JP4425288B2 - Surplus sludge solubilizer and ozone treatment tank for surplus sludge solubilizer - Google Patents
Surplus sludge solubilizer and ozone treatment tank for surplus sludge solubilizer Download PDFInfo
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- 239000010802 sludge Substances 0.000 title claims description 326
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims description 297
- 239000002904 solvent Substances 0.000 title claims description 14
- 230000004087 circulation Effects 0.000 claims description 78
- 238000005063 solubilization Methods 0.000 claims description 47
- 230000007928 solubilization Effects 0.000 claims description 47
- 238000004891 communication Methods 0.000 claims description 40
- 238000005273 aeration Methods 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 34
- 239000010815 organic waste Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 description 21
- 238000012545 processing Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 9
- 210000002421 cell wall Anatomy 0.000 description 6
- 230000003381 solubilizing effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004332 deodorization Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000002977 intracellular fluid Anatomy 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- -1 that is Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Description
本発明は、余剰汚泥可溶化装置及びそのためのオゾン処理槽に関する。より詳しく述べると、生物処理を利用した有機性廃液処理システムで生じる余剰汚泥を可溶化して汚泥を減容するための可溶化装置及び余剰汚泥可溶化装置用のオゾン処理槽に関する。 The present invention relates to an excess sludge solubilizer and an ozone treatment tank therefor. More specifically, the present invention relates to a solubilizer for solubilizing excess sludge generated in an organic waste liquid treatment system using biological treatment to reduce the sludge and an ozone treatment tank for the excess sludge solubilizer.
下水に代表される有機性排液は、例えば図８に示す通り、活性汚泥法等の生物処理により処理されている。
図８は、従来の一般的有機性廃液処理システムを示す模式図である。この有機性排液処理システムは、流量調整槽１０１と、流量調整槽１０１により搬送された有機性排液を生物処理するための第１曝気槽１０２、第２曝気槽１０３と、第２曝気槽１０３と接続され、第１曝気槽１０２、第２曝気槽１０３により処理した有機性排液を液体成分と沈殿した汚泥とに分離するための沈殿槽１０４と、沈殿槽１０４と接続され、沈殿槽１０４からの汚泥を濃縮し、第１曝気槽１０２に戻し、濃縮した汚泥を後段の汚泥処理槽１０６に送る汚泥濃縮貯留槽１０５と、汚泥濃縮貯留槽１０５で濃縮した汚泥を貯留するための汚泥貯留槽１０６とから主として構成されている。
Organic drainage typified by sewage is treated by biological treatment such as an activated sludge method as shown in FIG. 8, for example.
FIG. 8 is a schematic diagram showing a conventional general organic waste liquid treatment system. The organic drainage treatment system includes a flow rate adjustment tank 101, a first aeration tank 102, a second aeration tank 103, and a second aeration tank for biologically treating the organic drainage conveyed by the flow rate adjustment tank 101. 103, a first aeration tank 102, a second aeration tank 103, a separation tank 104 for separating the organic drainage liquid into liquid components and precipitated sludge, and a precipitation tank 104 connected to the precipitation tank 104. Sludge for concentrating sludge from 104, returning it to the first aeration tank 102, sending the concentrated sludge to the subsequent sludge treatment tank 106, and sludge for storing the sludge concentrated in the sludge concentration storage tank 105 The storage tank 106 is mainly configured.
なお、生物処理槽である曝気槽の数は任意であり、また汚泥濃縮槽槽１０５からの分離液は、第１曝気槽１０２の代わりに流量調整槽１０１に戻す構成としてもよい。 The number of aeration tanks that are biological treatment tanks is arbitrary, and the separation liquid from the sludge concentration tank 105 may be returned to the flow rate adjustment tank 101 instead of the first aeration tank 102.
第１曝気槽１０２および第２曝気槽１０３は、有機性排液を生物処理するための処理槽であり、一般に曝気（エアレーション）するための曝気装置を有しており、好気的条件により生物処理している。
生物処理した液体（処理液）を沈殿槽１０４で固液分離し、分離された液体（分離液）は殺菌又は消毒された後、放流される。
固液分離された固体成分（スラリー状物）は、後段の汚泥濃縮貯留槽１０５に搬送されて、汚泥濃縮貯留槽１０５でさらに液体と固体とに分離される。
The first aeration tank 102 and the second aeration tank 103 are treatment tanks for biologically treating the organic waste liquid, and generally have an aeration apparatus for aeration (aeration). Processing.
The biologically treated liquid (treatment liquid) is solid-liquid separated in the settling tank 104, and the separated liquid (separated liquid) is sterilized or disinfected and then discharged.
The solid component (slurry) that has been subjected to solid-liquid separation is transported to the subsequent sludge concentration storage tank 105 and further separated into liquid and solid in the sludge concentration storage tank 105.
分離された液体の大部分は、第１曝気槽１０２（または流量調整槽１０１）に戻され再び第１曝気槽１０２および第２曝気槽１０３で生物処理に供せられる。
一方、分離された汚泥（および少量の分離液を含む）は、後段の汚泥貯留槽１０６に搬送された後に、余剰汚泥として処理される。
Most of the separated liquid is returned to the first aeration tank 102 (or the flow rate adjustment tank 101) and again subjected to biological treatment in the first aeration tank 102 and the second aeration tank 103.
On the other hand, the separated sludge (and a small amount of separation liquid) is transferred to the subsequent sludge storage tank 106 and then processed as excess sludge.
余剰汚泥は、例えば最終処分場や焼却処理施設等で処理されるかあるいはコンポスト化されて再利用されている。 Excess sludge is treated, for example, at a final disposal site or an incineration facility, or is composted and reused.
しかしながら、最終処分場での処理可能量が少なくなり、また焼却処分を行う場合にはダイオキシン対策を講じる必要がある等の課題がある。 However, there is a problem that the amount that can be processed at the final disposal site is reduced, and dioxin measures need to be taken when incineration is performed.
これに対して、特許文献１〜３は、図９に示す通り余剰汚泥をオゾン処理して可溶化する方法が記載されている。
図９は、従来の余剰汚泥減容化装置を組み込んだ有機性排液処理システムを示す模式図である。
On the other hand, Patent Documents 1 to 3 describe a method of solubilizing excess sludge by ozone treatment as shown in FIG.
FIG. 9 is a schematic diagram showing an organic drainage treatment system incorporating a conventional excess sludge volume reducing device.
図９に示すシステムは、図８に示す従来の有機性廃液処理システムにおいて、沈殿槽１０４からの汚泥の一部を抜き取り、オゾン処理により可溶化するためのオゾン処理槽２０６、オゾン処理した汚泥から脱オゾンするための脱オゾン槽が設けられ、オゾン処理槽で汚泥の一部をオゾン処理により可溶化した汚泥を第１の曝気槽１０２（または流量調整槽１０１）に戻している（汚泥返送ライン）。
しかしながら、特許文献１〜３の方法では、汚泥の一部を抜き取って可溶化するので余剰汚泥の減容化量に課題がある。より具体的には、特許文献１〜３に記載の方法は、汚泥に対してワンパスでオゾン処理しているので、汚泥の減容化率は５０％程度である。また、使用するオゾン量は多量であるので、オゾン消費量を低減したいという要求がある。 However, in the methods of Patent Documents 1 to 3, since a part of the sludge is extracted and solubilized, there is a problem in the volume reduction of the excess sludge. More specifically, since the methods described in Patent Documents 1 to 3 perform ozone treatment on sludge in one pass, the volume reduction rate of sludge is about 50%. Further, since the amount of ozone used is large, there is a demand for reducing the amount of ozone consumed.
したがって、本発明の課題は、オゾンの消費量を抑え、より効率的に、好ましくは実質的に１００％、余剰汚泥を減容化する装置及び余剰を減容化する方法を提供することである。 Accordingly, an object of the present invention is to provide an apparatus for reducing the volume of excess sludge and a method for reducing the volume of excess sludge by suppressing consumption of ozone and more efficiently, preferably substantially 100%. .
上記課題を解決するために本発明者は鋭意検討した結果、有機性排液を生物処理するための生物処理槽および生物処理の際に生じる余剰汚泥を貯留するための汚泥貯留槽を含む有機性排液処理システムにおける余剰汚泥を減容化する余剰汚泥可溶化装置であって、前記汚泥貯留槽からの余剰汚泥を計量添加するための計量添加手段と、計量添加した余剰汚泥をオゾン処理するためのオゾン発生手段とを有するオゾン処理槽と、前記オゾン処理槽と前記余剰汚泥を循環可能に接続された循環槽であって、オゾン処理した余剰汚泥を散気手段により圧縮空気を散気しながら前記オゾン処理槽と循環槽との間を所定時間循環させて熟成処理して前記余剰汚泥の可溶化を完了し、そして可溶化を完了した余剰汚泥を前記生物処理槽側に戻す循環槽と、前記循環槽に接続され、前記循環槽で発生するオゾンを含む気体からオゾンを吸着するための脱オゾン槽と、から構成されることを特徴とする余剰汚泥可溶化装置、および
この装置を用いた、有機性排液を生物処理槽で生物処理した際に生じる余剰汚泥を減溶化する余剰汚泥の可容化方法であって、
（ａ） 所定量の余剰汚泥をオゾン処理槽に搬送する余剰汚泥搬送工程と、
（ｂ） 搬送した余剰汚泥をオゾン処理するオゾン処理工程と、
（ｃ） 前記オゾン処理した余剰汚泥を循環槽で圧縮空気を散気しながら熟成させるのと同時に、発生したオゾンを含む気体からオゾンを分解する熟成工程と、
（ｄ） 工程（ｃ）からの余剰汚泥をオゾン処理槽と循環槽との間で循環させて可溶化を完了する循環工程と、
（ｅ） 可溶化を完了した余剰汚泥を再び生物処理槽に戻して生物処理する生物処理工程と、を含むことを特徴とする余剰汚泥の可溶化方法により、既存の有機性廃液処理システムに接続して、有機性廃液処理システムから発生する余剰汚泥を少ないオゾンの消費量で充分に可溶化して有機性廃液処理システムの生物処理槽に戻すことによって、実質的に全ての余剰汚泥を減容化することが可能となることを先に見出して特許出願した（特願２００６−２１６６２８）。
In order to solve the above-mentioned problems, the present inventor has intensively studied, and as a result, an organic material including a biological treatment tank for biological treatment of organic waste liquid and a sludge storage tank for storing excess sludge generated during biological treatment. A surplus sludge solubilizing device for reducing the volume of surplus sludge in a wastewater treatment system, wherein the surplus sludge from the sludge storage tank is metered and added, and the surplus sludge that has been metered is ozone-treated. An ozone treatment tank having ozone generation means, and a circulation tank connected so as to be able to circulate the ozone treatment tank and the excess sludge while the compressed air is diffused by the aeration means with the excess sludge treated with ozone. A circulation tank that circulates between the ozone treatment tank and the circulation tank for a predetermined time to complete the solubilization of the surplus sludge and return the surplus sludge that has been solubilized to the biological treatment tank side, A surplus sludge solubilization device, which is connected to the circulation tank and configured to adsorb ozone from a gas containing ozone generated in the circulation tank, and using this apparatus A method for making surplus sludge to reduce excess sludge generated when biological wastewater is biologically treated in a biological treatment tank,
(A) a surplus sludge transporting step for transporting a predetermined amount of surplus sludge to an ozone treatment tank;
(B) an ozone treatment process for ozone treatment of the excess sludge conveyed;
(C) A maturing step of decomposing ozone from a gas containing generated ozone at the same time that the surplus sludge treated with ozone is aged while being diffused with compressed air in a circulation tank;
(D) a circulation step in which excess sludge from step (c) is circulated between the ozone treatment tank and the circulation tank to complete solubilization;
(E) The surplus sludge that has been solubilized is returned to the biological treatment tank and biologically treated, and the surplus sludge is solubilized and connected to an existing organic waste liquid treatment system. Then, the excess sludge generated from the organic waste liquid treatment system is sufficiently solubilized with a small amount of ozone consumption and returned to the biological treatment tank of the organic waste liquid treatment system, thereby substantially reducing the volume of all excess sludge. First, it was found that it was possible to make it possible, and a patent application was filed (Japanese Patent Application No. 2006-216628).
なお、本発明で使用する用語「熟成」とは、オゾン処理して一部可溶化した余剰汚泥の可溶化を所定のレベルまで促進する処理を意味する。また、所定レベルまで可溶化することを本発明では、可溶化の完了と言う。 The term “ripening” used in the present invention means a treatment for promoting solubilization of surplus sludge partially solubilized by ozone treatment to a predetermined level. Further, solubilization to a predetermined level is referred to as completion of solubilization in the present invention.
本発明者等はさらに、鋭意検討した結果、前記装置において、オゾン処理槽を所定の構成にすることによって、オゾン処理槽におけるオゾン処理した（オゾン処理している）汚泥の滞留時間を長くとることができ、すなわち、オゾン処理槽内でのオゾンと汚泥との接触時間をより長時間とることが可能となり、比較的少ないスペースで効率よく汚泥のオゾン処理を行うことができることを見出して本発明を創作するに至った。 Further, as a result of intensive studies, the present inventors have made the ozone treatment tank have a predetermined configuration in the above-described apparatus, thereby increasing the residence time of the ozone-treated (ozone-treated) sludge in the ozone treatment tank. In other words, the present invention finds that the contact time between ozone and sludge in the ozone treatment tank can be made longer, and that sludge can be efficiently treated with ozone in a relatively small space. I came to create.
すなわち、本発明の第１実施形態によると有機性排液を生物処理するための生物処理槽および生物処理の際に生じる余剰汚泥を貯留するための汚泥貯留槽を含む有機性排液処理システムにおける余剰汚泥を減容化する余剰汚泥可溶化装置であって、
前記汚泥貯留槽からの余剰汚泥を計量添加するための計量添加手段と、計量添加した余剰汚泥をオゾン処理するためのオゾン発生手段とを有するオゾン処理槽と、
前記オゾン処理槽と前記余剰汚泥を循環可能に接続された循環槽であって、オゾン処理した余剰汚泥を散気手段により圧縮空気を散気しながら前記オゾン処理槽と循環槽との間を所定時間循環させて熟成処理して前記余剰汚泥の可溶化を完了し、そして可溶化を完了した余剰汚泥を前記生物処理槽側に戻す循環槽と、
前記循環槽に接続され、前記循環槽で発生するオゾンを含む気体からオゾンを吸着するための脱オゾン槽と、
から構成され、
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、前記汚泥貯留槽および前記循環槽からの汚泥を導入するための汚泥導入手段と、前記処理槽側からの汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を循環槽に搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置が提供される。
That is, according to the first embodiment of the present invention, in an organic drainage treatment system including a biological treatment tank for biologically treating organic wastewater and a sludge storage tank for storing surplus sludge generated during biological treatment. A surplus sludge solubilization device for reducing the volume of surplus sludge,
An ozone treatment tank having metering addition means for metering and adding surplus sludge from the sludge storage tank, and ozone generating means for ozone treatment of the metered surplus sludge;
A circulation tank connected to be able to circulate the ozone treatment tank and the excess sludge, and the ozone treatment tank and the circulation tank are predetermined between the ozone treatment tank and the circulation tank while the compressed air is diffused by the aeration means. A circulation tank that circulates for a period of time to complete solubilization of the surplus sludge, and returns the surplus sludge that has been solubilized to the biological treatment tank side,
A deozonation tank connected to the circulation tank and for adsorbing ozone from a gas containing ozone generated in the circulation tank;
Consisting of
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks includes an ozone introduction means provided extending in a vertical direction of the treatment tank body for introducing ozone generated by the ozone generation means, and the sludge storage tank. And sludge introduction means for introducing sludge from the circulation tank, sludge introduction means for introducing sludge from the treatment tank side, and communication for transporting the sludge to be treated with ozone to the next treatment tank A tube and
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge to the circulation tank, and the plurality of treatment tanks The treatment tank in the middle of the treatment tank has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
The surplus sludge solubilizer is provided, wherein the sludge introduced into the first treatment tank together with ozone is liquid-tightly pumped to the next treatment apparatus and discharged from the last treatment tank.
また、本発明の第２実施形態に係る発明は、有機性排液を生物処理するための生物処理槽および生物処理の際に生じる余剰汚泥を貯留するための汚泥貯留槽を含む有機性排液処理システムにおける余剰汚泥を減容化する余剰汚泥可溶化装置であって、
前記汚泥貯留槽からの余剰汚泥を計量添加するための計量添加手段と、計量添加した余剰汚泥をオゾン処理するためのオゾン発生手段とを有するオゾン処理槽と、
前記オゾン処理槽と前記余剰汚泥を循環可能に接続された循環槽であって、オゾン処理した余剰汚泥を散気手段により圧縮空気を散気しながら前記オゾン処理槽と循環槽との間を所定時間循環させて熟成処理して前記余剰汚泥の可溶化を完了し、そして可溶化を完了した余剰汚泥を前記生物処理槽側に戻す循環槽と、
前記循環槽に接続され、前記循環槽で発生するオゾンを含む気体からオゾンを吸着するための脱オゾン槽と、
から構成された余剰汚泥可溶化装置におけるオゾン処理槽であって、
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、前記汚泥貯留槽および前記循環槽からの汚泥を導入するための汚泥導入手段と、前記処理槽側からの汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を循環槽に搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置用のオゾン処理槽である。
Moreover, the invention which concerns on 2nd Embodiment of this invention is the organic waste liquid containing the biological treatment tank for biologically processing organic waste liquid, and the sludge storage tank for storing the excess sludge produced in the case of biological treatment An excess sludge solubilization device for reducing the volume of excess sludge in a treatment system,
An ozone treatment tank having metering addition means for metering and adding surplus sludge from the sludge storage tank, and ozone generating means for ozone treatment of the metered surplus sludge;
A circulation tank connected to be able to circulate the ozone treatment tank and the excess sludge, and the ozone treatment tank and the circulation tank are predetermined between the ozone treatment tank and the circulation tank while the compressed air is diffused by the aeration means. A circulation tank that circulates for a period of time to complete solubilization of the surplus sludge, and returns the surplus sludge that has been solubilized to the biological treatment tank side,
A deozonation tank connected to the circulation tank and for adsorbing ozone from a gas containing ozone generated in the circulation tank;
It is an ozone treatment tank in an excess sludge solubilization device composed of:
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks includes an ozone introduction means provided extending in a vertical direction of the treatment tank body for introducing ozone generated by the ozone generation means, and the sludge storage tank. And sludge introduction means for introducing sludge from the circulation tank, sludge introduction means for introducing sludge from the treatment tank side, and communication for transporting the sludge to be treated with ozone to the next treatment tank A tube and
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge to the circulation tank, and the plurality of treatment tanks The treatment tank in the middle of the treatment tank has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
It is an ozone treatment tank for surplus sludge solubilizer, wherein the sludge introduced together with ozone into the first treatment tank is pumped in a liquid-tight manner and discharged from the last treatment tank.
さらに、本発明の第３実施形態に係る発明は、オゾン処理によって有機性排液由来の汚泥を減容化するためのオゾン処理槽であって、
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置用のオゾン処理槽である。
Furthermore, the invention according to the third embodiment of the present invention is an ozone treatment tank for reducing the volume of sludge derived from organic waste liquid by ozone treatment,
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks introduces sludge and ozone introduction means provided extending in the vertical direction of the treatment tank main body for introducing ozone generated by the ozone generation means. And a communication pipe for conveying the ozone-treated sludge to the next treatment tank,
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge, and the plurality of treatment tanks Among them, the treatment tank in the middle has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
It is an ozone treatment tank for surplus sludge solubilizer, wherein the sludge introduced together with ozone into the first treatment tank is pumped in a liquid-tight manner and discharged from the last treatment tank.
このようにして構成された本発明によると、密封系のオゾン処理槽を縦方向に区切って複数の処理槽を設け、そして最初の処理槽から順次オゾン発生装置で発生したオゾンとともに汚泥を圧送するので、省スペースで滞留時間を長くとることが可能となり、すなわち、オゾンと汚泥との接触時間を長くとることが可能となり、そのため効率よく密封系内で汚泥をオゾン処理することが可能となる。従って、より少ないオゾン量で効率よく、実際には約１００％、汚泥処理を行うことが可能となる。 According to the present invention configured as described above, a plurality of treatment tanks are provided by vertically dividing a sealed ozone treatment tank, and sludge is pumped together with ozone generated in the ozone generator sequentially from the first treatment tank. Therefore, it is possible to take a long residence time in a space-saving manner, that is, it is possible to take a long contact time between ozone and sludge, so that the sludge can be efficiently ozone-treated in the sealed system. Therefore, sludge treatment can be performed efficiently with a smaller amount of ozone, and in fact, about 100%.
以下、本発明を添付図面に基づいて詳細に説明する。図１は、本発明の余剰汚泥減容化装置を組み込んだ有機性排液処理システムを示す模式図であり、図２は、本発明の余剰汚泥減容化装置を示す模式図であり、図３は、本発明のオゾン処理槽を示す側面図であり、図４は、本発明のオゾン処理槽の平面図であり、図５は、図３に示すオゾン処理槽のＡ-Ａ断面図であり、図６は、余剰汚泥の分解の様子を示す模式図であり、そして図７は本発明の余剰汚泥可溶化を示すフローチャートである。 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram showing an organic drainage treatment system incorporating the surplus sludge volume reducing device of the present invention, and FIG. 2 is a schematic diagram showing the surplus sludge volume reducing device of the present invention. 3 is a side view showing the ozone treatment tank of the present invention, FIG. 4 is a plan view of the ozone treatment tank of the present invention, and FIG. 5 is an AA cross-sectional view of the ozone treatment tank shown in FIG. FIG. 6 is a schematic view showing how the excess sludge is decomposed, and FIG. 7 is a flowchart showing the solubilization of the excess sludge according to the present invention.
〔余剰汚泥の可溶化装置〕
まず、図１に基づいて、本発明の余剰汚泥の可溶化装置の説明をする。
図１に示す通り、本発明の余剰汚泥の可溶化装置は、既存の有機性廃液の生物処理システム（例えば、図８に記載したシステム：図１中、点線で囲った部分）に接続して生物処理システムから生じる余剰汚泥を可溶化して生物処理側に可溶化した汚泥を戻す装置である。
[Solubilizer for excess sludge]
First, the excessive sludge solubilization apparatus of the present invention will be described with reference to FIG.
As shown in FIG. 1, the surplus sludge solubilization apparatus of the present invention is connected to an existing organic waste liquid biological treatment system (for example, the system shown in FIG. 8: a portion surrounded by a dotted line in FIG. 1). It is an apparatus that solubilizes excess sludge generated from a biological treatment system and returns the solubilized sludge to the biological treatment side.
既存の有機性排液処理システムは、従来技術で記載した通り、流量調整槽１０１と、流量調整槽１０１により搬送された有機性排液を生物処理するための第１曝気槽１０２、第２曝気槽１０３と、第２曝気槽１０３と接続され、第１、２曝気槽１０２、１０３により処理した有機性排液を液体成分と沈殿した汚泥とに分離するための沈殿槽１０４と、沈殿槽１０４と接続され、沈殿槽１０４からの汚泥を濃縮し、第１の曝気槽１０２に戻し、濃縮した汚泥を後段の汚泥処理槽１０６に送る汚泥濃縮貯留槽１０５と、汚泥濃縮貯留槽１０５で濃縮した汚泥を貯留するための汚泥貯留槽１０６とから主として構成されている（段落０００２〜０００５参照）。 As described in the prior art, the existing organic drainage treatment system includes a flow rate adjustment tank 101, a first aeration tank 102 and a second aeration for biological treatment of the organic drainage conveyed by the flow rate adjustment tank 101. A settling tank 104 connected to the tank 103, the second aeration tank 103, and for separating the organic waste liquid treated by the first and second aeration tanks 102, 103 into a liquid component and precipitated sludge; And the sludge from the sedimentation tank 104 is concentrated, returned to the first aeration tank 102, and the concentrated sludge is sent to the subsequent sludge treatment tank 106 and concentrated in the sludge concentration storage tank 105. It mainly comprises a sludge storage tank 106 for storing sludge (see paragraphs 0002 to 0005).
本発明の余剰汚泥の可溶化装置は、汚泥貯留槽１０６と接続された多槽式オゾン処理槽１と、前記多槽式オゾン処理槽１と循環可能に接続された循環槽２と、多槽式オゾン処理槽１で発生したオゾンを含有する気体からオゾンを吸着する脱オゾン槽３と、循環処理槽２で充分熟成して可溶化した汚泥を生物処理槽（流量調整槽１０１または第１曝気槽１０２、図の例では第１曝気槽１０２）に戻すためのラインとから主として構成されている。 The surplus sludge solubilization apparatus of the present invention includes a multi-tank ozone treatment tank 1 connected to a sludge storage tank 106, a circulation tank 2 connected to the multi-tank ozone treatment tank 1 in a circulatory manner, and a multi-tank. The deozonation tank 3 that adsorbs ozone from the gas containing ozone generated in the ozone treatment tank 1, and the biological treatment tank (the flow adjustment tank 101 or the first aeration) It is mainly composed of a tank 102 and a line for returning to the first aeration tank 102) in the illustrated example.
（多槽式オゾン処理槽１）
本発明の多槽式オゾン処置槽１は、汚泥貯留槽１０６に貯留された余剰汚泥にオゾン添加して（オゾンガスの吹き込み）、余剰汚泥とオゾンガスとを接触させ、余剰汚泥の細胞壁にオゾンの酸化力により傷を付け浸透圧で細胞内の液を出して可溶化する槽である。そのため、オゾン処理槽１は、図２に示す通りオゾン発生器１１と接続されている。
オゾン発生器１１は、所定量のオゾンを発生できる装置であれば特に限定されるものではないが、一般には常温常圧の空気を原料として無声放電方式でインバータを使用して高濃度のオゾンを連続して発生する装置である。オゾン発生器１１にはオゾン量を調節するための調整ダイヤルとオゾン化するための空気の量を調整により行う。そして、オゾン量を調整して所定量のオゾンガスを本発明の多槽式オゾン処理槽１に添加する。
(Multi-tank type ozone treatment tank 1)
The multi-tank type ozone treatment tank 1 of the present invention adds ozone to excess sludge stored in the sludge storage tank 106 (injection of ozone gas), brings the excess sludge into contact with ozone gas, and oxidizes ozone on the cell wall of the excess sludge. It is a tank that is damaged by force and is solubilized by removing intracellular fluid with osmotic pressure. Therefore, the ozone treatment tank 1 is connected to the ozone generator 11 as shown in FIG.
The ozone generator 11 is not particularly limited as long as it is a device that can generate a predetermined amount of ozone. It is a device that generates continuously. The ozone generator 11 is adjusted by adjusting an adjustment dial for adjusting the amount of ozone and the amount of air for ozonization. Then, the ozone amount is adjusted and a predetermined amount of ozone gas is added to the multi-tank ozone treatment tank 1 of the present invention.
本発明の多槽式オゾン処理槽１は、汚泥をオゾン処理して可溶化するとともに、オゾン処理して可溶化した汚泥を、後述する循環槽２との間で所定時間循環させるための槽であり、密封系の処理槽本体を垂直方向に多室式に区切った構成を有している。なお、本発明の余剰汚泥の可溶化装置において、多槽式オゾン処理槽１には、後述する循環槽２との間での汚泥を循環して処理する際に所定量のオゾンを絶えず添加している。 The multi-tank type ozone treatment tank 1 of the present invention is a tank for circulating and sludge sludge solubilized by ozone treatment for a predetermined time with a circulation tank 2 described later. There is a configuration in which the main body of the processing tank of the sealed system is divided into a multi-chamber type in the vertical direction. In the surplus sludge solubilization apparatus of the present invention, a predetermined amount of ozone is continuously added to the multi-tank type ozone treatment tank 1 when the sludge is circulated between the circulation tank 2 described later and treated. ing.
より、具体的には、本発明の多槽式オゾン処理槽１は、図３〜図５に示す通りの構成を有している。なお図３〜図５に示す実施形態では、本発明の多槽式オゾン処理槽１は４槽式のオゾン処理槽として例示されているが、本発明のオゾン処理槽１の槽の数は、本発明の目的・効果を奏するものであれば特に４槽に限定されるものではなく、３槽であってもあるいは５槽以上であってもよい。 More specifically, the multi-tank type ozone treatment tank 1 of the present invention has a configuration as shown in FIGS. In addition, in embodiment shown in FIGS. 3-5, although the multi-tank type ozone treatment tank 1 of this invention is illustrated as a 4-tank type ozone treatment tank, the number of the tanks of the ozone treatment tank 1 of this invention is as follows. As long as the objects and effects of the present invention are exhibited, the number of tanks is not particularly limited, and may be 3 tanks or 5 tanks or more.
図３〜図５に示す通り、本発明の多槽式オゾン処理槽１は、密閉式の装置本体を垂直方向に区切った第１処理槽１ａ、第２処理槽１ｂ、第３処理槽１ｃおよび第4処理槽１ｄの各々独立した密閉槽である４つの処理槽から構成されている。第１処理槽1ａにはオゾン発生器１１（図１、図２参照）からのオゾンを第１の処理槽に導入するためのオゾン導入管１２（請求項でいうオゾン導入手段）と、図１に示す汚泥貯留槽１０６および循環槽２からの汚泥を導入するための汚泥導入手段１３と、前記オゾン処理する汚泥を次の処理槽である第２処理槽１ｂへ圧送するための汚泥連通管１４ａとを有しており、そして中間処理槽である第２および第３処理槽１ｂ、１ｃには、第１処理槽１ａから第２処理槽１ｂへオゾン処理中の汚泥を圧送するための汚泥連通管１４ａ、第２処理槽１ｂから第３処理槽１ｃへオゾン処理中の汚泥を圧送するための連通管１４ｂ、第３処理槽１ｃから最後の処理槽である第４処理槽１ｄへオゾン処理中の汚泥を圧送するための汚泥連通管１４ｃが各々設けられている。 As shown in FIGS. 3 to 5, the multi-tank type ozone treatment tank 1 of the present invention includes a first treatment tank 1 a, a second treatment tank 1 b, a third treatment tank 1 c, and a sealed apparatus body divided in the vertical direction. The fourth processing tank 1d is composed of four processing tanks that are independent sealed tanks. The first treatment tank 1a has an ozone introduction pipe 12 (ozone introduction means in the claims) for introducing ozone from the ozone generator 11 (see FIGS. 1 and 2) into the first treatment tank, and FIG. The sludge introduction means 13 for introducing the sludge from the sludge storage tank 106 and the circulation tank 2 shown in FIG. 2 and the sludge communication pipe 14a for pressure-feeding the sludge to be ozone-treated to the second treatment tank 1b as the next treatment tank. The second and third treatment tanks 1b and 1c, which are intermediate treatment tanks, have sludge communication for feeding sludge during ozone treatment from the first treatment tank 1a to the second treatment tank 1b. Ozone treatment from pipe 14a, second treatment tank 1b to third treatment tank 1c, communication pipe 14b for pressure-feeding sludge during ozone treatment, third treatment tank 1c to fourth treatment tank 1d as the last treatment tank Sludge communication pipes 14c for pumping sludge It is
そして、前記複数の処理槽のうち最後の処理槽である第４処理槽は１ｄ、前段の処理槽である第３処理槽１ｃからの汚泥を導入するための汚泥連通管１４ｃと、オゾン処理中の汚泥を循環槽２（図１、図２参照）に搬出（系外へ搬出）するための搬出管１５を有している。 And the 4th processing tank which is the last processing tank among the plurality of processing tanks is 1d, the sludge communication pipe 14c for introducing the sludge from the third processing tank 1c which is the previous processing tank, and the ozone treatment. The unloading pipe 15 for unloading the sludge to the circulation tank 2 (see FIGS. 1 and 2) (unloading outside the system) is provided.
すなわち、本実施形態のオゾン処理槽１は、密閉空間であるオゾン処理槽１を４つの密閉空間である第１〜第４処理槽に仕切り（液密・気密に仕切り）、各処理槽１ａ〜１ｄを汚泥連通管１４ａ〜１４ｃにより連通した構成を有している。そして、本実施形態のオゾン処理槽１における最初の処理槽である第１処理槽１ａはオゾン発生器２と、汚泥貯留槽１０６および循環槽２からの汚泥を導入するための二つの汚泥導入手段１３と接続されており、そして最後の処理槽である第４処理槽１ｄは、汚泥排出口である排出管１５から構成されている。
また、汚泥連通管１４ａ〜１４ｃは、各処理槽１ａ〜１ｃの下方から次の処理槽１ｂ〜１ｄの上方に向かってオゾン処理している汚泥を圧送するように構成されている。
That is, the ozone treatment tank 1 of this embodiment partitions the ozone treatment tank 1 that is a sealed space into four first to fourth treatment tanks that are sealed spaces (liquid-tight and air-tight partitions), and each of the treatment tanks 1a to 1a. 1d is communicated by sludge communication pipes 14a to 14c. And the 1st processing tank 1a which is the first processing tank in the ozone processing tank 1 of this embodiment is the ozone generator 2, and the two sludge introduction means for introducing the sludge from the sludge storage tank 106 and the circulation tank 2. 13 and the fourth treatment tank 1d, which is the last treatment tank, is composed of a discharge pipe 15 that is a sludge discharge port.
Moreover, the sludge communication pipes 14a to 14c are configured to pump the sludge subjected to ozone treatment from below the respective treatment tanks 1a to 1c toward the top of the next treatment tanks 1b to 1d.
このように各々液密（気密）に区切られた複数（本実施形態の場合には４槽）の処理槽から構成した本発明のオゾン処理槽は、まずオゾン発生器１１からのオゾンとともに汚泥が最初の処理槽である第１処理槽１ａに汚泥が導入される（流体の導入）と、第１処理槽１ａの流体量が連続して増加し、増加した体積分だけ汚泥連通管１４ａを介して汚泥、すなわちオゾン処理中である汚泥が第２処理槽１ｂに圧送される。そして順次連通管を介してオゾン処理中の汚泥が第２処理槽１ｂから第３処理槽１ｃへ、第３処理槽１ｃから第４処理槽１ｄへと圧送され、そして第４処理槽１ｄから密閉系である本発明の多槽式オゾン処理槽１の系外へと連続して搬送される。
この際に、第１処理槽１ａに上方から導入された汚泥は、オゾン発生器１１から同じく上方から散気されたオゾンとともに、第１処理槽１ａの下方へと圧送される。そして、汚泥は、オゾンが散気された状態で第１処理槽１ａの下方にある汚泥連通管１４ａ内を圧送されて上方から処理槽１ｂに入る。同様にして、オゾン処理中の汚泥は、第２処理槽１ｂの下方から汚泥連通管１４ｂ内を圧送されて上方から第３処理槽１ｃに入り、第３処理槽１ｃの下方から汚泥連通管１４ｃ内を圧送されて上方から第４処理槽１ｄに入り、そして第４処理槽１ｄからオゾン処理槽１の外に排出される。
本発明の多槽式オゾン処理槽１において、汚泥は、オゾン発生器１１からのオゾンとともに汚泥貯留槽１０６および循環槽２からの絶えず第１処理槽１ａに供給され、そして密閉空間である第１〜第４処理槽１ａ〜１ｄ内で所定の圧力が負荷された状態で循環槽２へ排出されることとなる。
Thus, the ozone treatment tank of the present invention constituted by a plurality of treatment tanks (four tanks in the case of the present embodiment) divided into liquid tightness (air tightness), first, sludge together with ozone from the ozone generator 11. When the sludge is introduced into the first treatment tank 1a, which is the first treatment tank (introduction of fluid), the amount of fluid in the first treatment tank 1a continuously increases, and the increased volume fraction passes through the sludge communication pipe 14a. Then, sludge, that is, sludge being subjected to ozone treatment, is pumped to the second treatment tank 1b. Then, the sludge during ozone treatment is sequentially pumped from the second treatment tank 1b to the third treatment tank 1c, from the third treatment tank 1c to the fourth treatment tank 1d, and sealed from the fourth treatment tank 1d through the communication pipe. It is continuously conveyed out of the system of the multi-tank ozone treatment tank 1 of the present invention which is a system.
At this time, the sludge introduced into the first treatment tank 1a from above is pumped together with ozone diffused from above from the ozone generator 11 to the lower side of the first treatment tank 1a. The sludge is pumped through the sludge communication pipe 14a below the first treatment tank 1a with ozone diffused and enters the treatment tank 1b from above. Similarly, sludge during the ozone treatment is pumped through the sludge communication pipe 14b from below the second treatment tank 1b and enters the third treatment tank 1c from above, and the sludge communication pipe 14c from below the third treatment tank 1c. The inside is pumped, enters the fourth treatment tank 1d from above, and is discharged out of the ozone treatment tank 1 from the fourth treatment tank 1d.
In the multi-tank ozone treatment tank 1 of the present invention, the sludge is supplied to the first treatment tank 1a from the sludge storage tank 106 and the circulation tank 2 together with the ozone from the ozone generator 11, and is a first sealed space. -It will be discharged | emitted to the circulation tank 2 in the state by which the predetermined pressure was loaded in the 4th process tank 1a-1d.
そのため、本発明の多槽式オゾン処理槽１は、連続して汚泥をオゾン処理することが可能であるとともに、多槽式オゾン処理槽１でのオゾン処理中の汚泥の滞留時間を長く取ることが可能となる。また。本発明の多槽式オゾン処理槽１は、処理槽本体を複数の密閉空間に区切っているので、単位面積当たりの滞留時間を長くすることができるので、少ないスペースでも充分にオゾン処理を行うことが可能となる。
すなわち、単槽式のオゾン処理装置に比較して、例えば４槽式の本発明によるオゾン処理装置は、密閉空間内で約４倍のオゾン処理槽内での滞留時間（すなわち、オゾンと汚泥との接触時間）を確保することが可能となるので、省スペースで効率のより汚泥のオゾン処理を行うことが可能となる。
さらに、本発明のオゾン処理槽１において、汚泥は、オゾン発生器１１からのオゾンとともに汚泥貯留槽１０６および循環槽２から絶えず第１処理槽１ａに供給され、そして密閉空間である第１〜第４処理槽１ａ〜１ｄ内で所定の圧力が負荷された状態で循環槽２へ排出されるので、汚泥は絶えず散気されているオゾンと、所定の圧力が負荷された状態で反応すると考えられる。そのため、オゾンと汚泥との反応効率が格段に上昇するものと考えられる。
また、本実施形態のオゾン処理槽１は、密閉空間であるオゾン処理槽１を４つの密閉空間である第１〜第４処理槽に仕切ることにより、各処理槽を構成しているので、各処理槽は、比較的簡単な構成を有しており、メンテナンスなどを容易に行うことができる。すなわち、一般に滞留時間を長くとるためには、じゃま板などを設けて処理槽内を通流する汚泥の処理槽内での滞留時間を確保することが考えられるが、このように処理槽内を複雑化するとメンテナンス等が大変となるだけでなく、場合によっては目詰まりの原因となる。
これに対して本発明のように縦方向に処理槽を区切るという簡単な構成で多槽式オゾン処理槽を実現することによって、処理槽の製造もメンテナンスも用意になるという副次的効果も奏する。
Therefore, the multi-tank type ozone treatment tank 1 of the present invention can continuously treat the sludge with ozone and take a long sludge residence time during the ozone treatment in the multi-tank type ozone treatment tank 1. Is possible. Also. Since the multi-tank type ozone treatment tank 1 of the present invention divides the treatment tank main body into a plurality of sealed spaces, the residence time per unit area can be increased, so that the ozone treatment can be sufficiently performed even in a small space. Is possible.
That is, compared with a single tank type ozone treatment apparatus, for example, a four tank type ozone treatment apparatus according to the present invention has a residence time (that is, ozone, sludge, The contact time) of the sludge can be ensured, so that it is possible to perform the ozone treatment of sludge in a space-saving and more efficient manner.
Furthermore, in the ozone treatment tank 1 of the present invention, the sludge is continuously supplied from the sludge storage tank 106 and the circulation tank 2 together with the ozone from the ozone generator 11 to the first treatment tank 1a, and is the first to first sealed spaces. Since it is discharged to the circulation tank 2 in a state where a predetermined pressure is loaded in the four treatment tanks 1a to 1d, it is considered that sludge reacts with ozone being continuously diffused in a state where the predetermined pressure is loaded. . Therefore, it is considered that the reaction efficiency between ozone and sludge increases markedly.
Moreover, since the ozone treatment tank 1 of this embodiment comprises each treatment tank by partitioning the ozone treatment tank 1 that is a sealed space into first to fourth treatment tanks that are four sealed spaces, The treatment tank has a relatively simple configuration and can be easily maintained. That is, in general, in order to increase the residence time, it is conceivable to provide a baffle plate or the like to secure the residence time in the treatment tank of sludge flowing through the treatment tank. If it becomes complicated, not only will maintenance be difficult, but it may cause clogging in some cases.
On the other hand, by implementing a multi-tank type ozone treatment tank with a simple configuration in which the treatment tanks are partitioned in the vertical direction as in the present invention, there is also a secondary effect that preparation and maintenance of the treatment tanks are prepared. .
（循環槽２）
循環槽２は、本発明の多槽式オゾン処理槽１で可溶化した汚泥を、オゾン処理槽１との間で循環させて熟成させるための槽である。そして、循環槽２で熟成した汚泥を、既存のシステムの生物処理側に搬送して再び生物処理を行うとともに、一部（有意部分）を本発明の多層式オゾン処理槽１に戻す。すなわち、前述の通り本発明の多槽式オゾン処理装置１でオゾン処理した汚泥を循環槽に滞留させて熟成（可溶化の促進）を行い、再び本発明の多槽式オゾン処理装置１でオゾン処理を行う。本発明の多槽式オゾン処理装置では、循環槽２で熟成処理された汚泥を再びオゾン処理を行うが、前述の通り、本発明の多槽式オゾン処理装置１は、汚泥をオゾン処理槽内に長時間滞留させることができるので、このように多槽式オゾン処理装置１と循環槽２との間で汚泥を循環させることにより、効率よく汚泥の可溶化を行うことが可能となる。
(Circulation tank 2)
The circulation tank 2 is a tank for circulating and maturing the sludge solubilized in the multi-tank type ozone treatment tank 1 of the present invention with the ozone treatment tank 1. Then, the sludge aged in the circulation tank 2 is transported to the biological treatment side of the existing system to perform biological treatment again, and a part (significant part) is returned to the multilayer ozone treatment tank 1 of the present invention. That is, as described above, the sludge ozonated by the multi-tank ozone treatment apparatus 1 of the present invention is retained in the circulation tank and ripened (acceleration of solubilization), and the ozone is again produced by the multi-tank ozone treatment apparatus 1 of the present invention. Process. In the multi-tank type ozone treatment apparatus of the present invention, the sludge aged in the circulation tank 2 is ozone-treated again. As described above, the multi-tank type ozone treatment apparatus 1 of the present invention removes sludge in the ozone treatment tank. Therefore, it is possible to efficiently solubilize sludge by circulating the sludge between the multi-tank ozone treatment apparatus 1 and the circulation tank 2 in this manner.
図１に示す通り循環槽２は、複数の部屋に区切られており、各部屋には圧縮空気を送るための散気手段２１が設けられている。そして散気手段２１により圧縮空気を送ることにより汚泥の可溶化を促進するとともに、汚泥中のオゾンを脱気させる機能を有している。
循環槽２は、さらにオゾン処理槽１との間を循環させるための循環ラインと、オゾンを含有する気体からオゾンを吸着する脱オゾン槽３と、可溶化を促進した（実質的に完全に可溶化した）汚泥を、生物処理槽（図１の例では第１曝気槽１０２）に戻すための返送ラインとを有している。
As shown in FIG. 1, the circulation tank 2 is divided into a plurality of rooms, and each room is provided with an air diffuser 21 for sending compressed air. And by sending compressed air with the aeration means 21, it has the function to accelerate | stimulate solubilization of sludge and to deaerate ozone in sludge.
The circulation tank 2 further promotes solubilization (substantially completely possible), a circulation line for circulating between the ozone treatment tank 1 and a deozone tank 3 that adsorbs ozone from a gas containing ozone. There is a return line for returning the solubilized sludge to the biological treatment tank (first aeration tank 102 in the example of FIG. 1).
なお、本発明の好ましい実施形態によると、散気手段２１は、圧縮空気温度を１５〜３５℃の範囲に制御するための温度調整手段（例えば熱交換器）を有することが好ましい。このように温度調整することにより、安定した熟成処理を行うことが可能となる。 In addition, according to preferable embodiment of this invention, it is preferable that the aeration means 21 has a temperature adjustment means (for example, heat exchanger) for controlling compressed air temperature in the range of 15-35 degreeC. By adjusting the temperature in this way, it is possible to perform a stable aging treatment.
（脱オゾン槽３）
脱オゾン槽３は、循環槽２で発生したオゾンガスを含む気体を、排風機により吸い取るための吸気手段と、オゾンを吸着させるための活性炭槽と、オゾンを吸着した気体を排気するための排気口から構成されている。
このように構成した本発明の汚泥の可溶化装置は、多槽式オゾン処理槽と循環槽との間で、多槽式オゾン処理槽でオゾン処理した汚泥を循環させるので、実質的に全ての汚泥を可溶化することが可能である。しかも、前述の通り、本発明のオゾン処理槽は、処理槽本体を複数の密閉空間に区切っているので、単位面積当たりの滞留時間を長くすることができ（単槽式のオゾン処理装置に比較して、例えば４槽式の本発明によるオゾン処理装置は、密閉空間内で約４倍のオゾン処理槽内での滞留時間を確保することが可能となり、また高圧力下で密閉空間でオゾンと汚泥とを反応させるので、オゾンの反応率が格段に上昇する。従って、ワンパスで多量のオゾンを使用して汚泥のオゾン処理を行う従来技術の汚泥の可溶化装置における汚泥の可溶化が約５０％であるのに対して実質的に１００％の汚泥を可溶化させることが可能となる。
(Deozonation tank 3)
The deozonation tank 3 has an intake means for sucking out gas containing ozone gas generated in the circulation tank 2 by an exhaust fan, an activated carbon tank for adsorbing ozone, and an exhaust port for exhausting the gas adsorbed with ozone. It is composed of
The sludge solubilization device of the present invention configured as described above circulates the sludge treated with ozone in the multi-tank type ozone treatment tank between the multi-tank type ozone treatment tank and the circulation tank. It is possible to solubilize sludge. Moreover, as described above, the ozone treatment tank of the present invention divides the treatment tank main body into a plurality of sealed spaces, so that the residence time per unit area can be increased (compared to a single tank type ozone treatment apparatus). Thus, for example, a four-tank type ozone treatment apparatus according to the present invention can secure a residence time in the ozone treatment tank that is about four times in the sealed space, and ozone and the ozone in the sealed space under high pressure. The reaction rate of ozone is remarkably increased because it reacts with sludge, so that sludge solubilization in a sludge solubilization apparatus of the prior art that performs sludge ozone treatment using a large amount of ozone in one pass is about 50. It becomes possible to solubilize substantially 100% of sludge.
［余剰汚泥の可溶化装置の動作・余剰汚泥の可溶化］
次に、本発明の余剰汚泥の可溶化装置の動作（余剰汚泥の可溶化方法）について説明する。
（オゾン処理（工程（ａ）、工程（ｂ））
まず、汚泥貯留槽らの余剰汚泥を所定量、本発明の多槽式オゾン処理槽１の第１処理槽１aに搬送する。余剰汚泥の第１処理槽１ａへの搬送と同時に所定量のオゾンを連続してオゾン処理槽１における第１処理槽１ａに吹き込む。
余剰汚泥と、オゾンとがオゾン処理槽で接触することによって余剰汚泥は、オゾンの酸化作用により可溶化し始める。
[Operation of solubilizer for excess sludge / Solubilization of excess sludge]
Next, the operation of the surplus sludge solubilizer according to the present invention (method for solubilizing surplus sludge) will be described.
(Ozone treatment (step (a), step (b))
First, a predetermined amount of excess sludge from the sludge storage tanks is conveyed to the first treatment tank 1a of the multi-tank ozone treatment tank 1 of the present invention. A predetermined amount of ozone is continuously blown into the first treatment tank 1a in the ozone treatment tank 1 simultaneously with the transfer of excess sludge to the first treatment tank 1a.
As the excess sludge and ozone come into contact with each other in the ozone treatment tank, the excess sludge begins to be solubilized by the oxidizing action of ozone.
すなわち、余剰汚泥中（有機性排液）中のＳＳ成分は、生物に起因する有機物質である。オゾンは、有機性浮遊物を構成する細胞壁や細胞質膜を攻撃してこれらを破壊する。さらに、オゾンは、細胞壁を構成する多糖類も分解する。 That is, the SS component in the excess sludge (organic drainage liquid) is an organic substance derived from living organisms. Ozone attacks and destroys cell walls and cytoplasmic membranes that make up organic suspensions. Furthermore, ozone also decomposes the polysaccharides that make up the cell walls.
より具体的には、図６に示す通り、オゾンを添加すると、汚泥を構成する微生物等の細胞壁に傷が付き分解されやすい状態となる。また、一部の糖類やたんぱく質の分解も開始される。
次いで、細胞壁が分解することにより浸透圧の関係から余剰汚泥を構成する微生物等の細胞内へ水が流入し、膨張・肥大化してくる。そして、水の流入により膨張・肥大化した余剰汚泥を構成する細胞内から内容物が流出し始める。このようにして余剰汚泥は分解されて可溶化状態となる。
この際に、本発明のオゾン処理工程を、前述のような多槽式オゾン処理槽１に行うことによって、汚泥への可溶化を促進する。
More specifically, as shown in FIG. 6, when ozone is added, cell walls of microorganisms and the like that constitute sludge are easily damaged and decomposed. In addition, decomposition of some saccharides and proteins is also started.
Next, when the cell wall is decomposed, water flows into cells such as microorganisms constituting the excess sludge from the relationship of osmotic pressure, and expands and enlarges. And the content begins to flow out from the cell which comprises the excess sludge expanded and enlarged by inflow of water. In this way, the excess sludge is decomposed and becomes a solubilized state.
At this time, solubilization in sludge is promoted by performing the ozone treatment process of the present invention in the multi-tank type ozone treatment tank 1 as described above.
すなわち、本発明におけるオゾン処理工程を多槽式のオゾン処理装置を用いて行うことにより、単槽式のオゾン処理装置に比較して、例えば４槽式の本発明によるオゾン処理装置の場合には、密閉空間内で約４倍のオゾン処理槽内での滞留時間（すなわち、オゾンと汚泥との接触時間）を確保することが可能となる。
また、本発明のオゾン処理槽１において、オゾン処理に供せられる汚泥は、散気されたオゾンとともに汚泥貯留槽および循環槽から絶えず第１処理槽１ａに供給され、そして密閉空間である複数の処理槽内で所定の圧力が負荷された状態で循環槽へ排出されるので、汚泥は絶えず散気されているオゾンと、所定の圧力下で反応すると考えられる。そのため、オゾンと汚泥との反応効率が格段に上昇するものと考えられる。
That is, by performing the ozone treatment process in the present invention using a multi-tank type ozone treatment apparatus, compared to a single tank type ozone treatment apparatus, for example, in the case of an ozone treatment apparatus according to the present invention having four tank types. In addition, it is possible to secure a residence time (that is, a contact time between ozone and sludge) in the ozone treatment tank that is about four times in the sealed space.
Moreover, in the ozone treatment tank 1 of the present invention, the sludge to be subjected to the ozone treatment is continuously supplied from the sludge storage tank and the circulation tank to the first treatment tank 1a together with the diffused ozone, and is a plurality of sealed spaces. Since it is discharged into the circulation tank in a state where a predetermined pressure is applied in the treatment tank, it is considered that the sludge reacts with ozone that is continuously diffused under a predetermined pressure. Therefore, it is considered that the reaction efficiency between ozone and sludge increases markedly.
（熟成・循環工程（工程（ｃ）、（ｄ））
本発明では、このような可溶化状態を促進するために、本発明による多槽式オゾン処理槽と循環槽との間にオゾン処理して可溶化し始めた余剰汚泥を循環させる。
すなわち、オゾン処理した余剰汚泥の可溶化は充分とは言えず可溶化されていない部分を充分に含んでいる（一部可溶化状態）。
この熟成・循環工程でも本発明による多槽式オゾン処理槽内に一部可溶化状態の汚泥を導入した場合、前記のオゾン処理工程と同様に単槽式のオゾン処理装置に比較して、密閉空間内で略槽数倍のオゾン処理槽内での滞留時間（すなわち、オゾンと汚泥との接触時間）を確保することが可能となり、より長時間オゾンと一部可溶化汚泥との接触時間を確保することができる。
(Aging / circulation process (process (c), (d))
In the present invention, in order to promote such a solubilized state, surplus sludge that has started to be solubilized by ozone treatment is circulated between the multi-tank ozone treatment tank according to the present invention and the circulation tank.
That is, the surplus sludge treated with ozone is not sufficiently solubilized and contains a portion that has not been solubilized (partially solubilized state).
Even in this aging / circulation process, when partially solubilized sludge is introduced into the multi-tank ozone treatment tank according to the present invention, it is hermetically sealed as compared with the single tank type ozone treatment apparatus in the same manner as the ozone treatment process. It is possible to secure a residence time (that is, the contact time between ozone and sludge) in the ozone treatment tank that is approximately several times the number of tanks in the space, and a longer contact time between ozone and partially solubilized sludge. Can be secured.
すなわち、多槽式オゾン処理槽を用いる本発明では、多槽式オゾン処理槽から循環槽、循環槽から本発明の多槽式オゾン処理槽へと循環させながら可溶化を促進していく際に、オゾン処理槽からの一部可溶化した余剰汚泥を循環槽で圧縮空気の吹き込み下に滞留させることによって、可溶化を促進して、多槽式オゾン槽に戻すこととなる。この循環処理を所定時間（若しくは所定回数）繰り返すことによって、余剰汚泥の有意部分を可溶化する（可溶化完了）。図１に記載のように循環槽を多段化した場合には、順次処理した汚泥をオーバーフローさせながら次の部屋へと移していく。
この際に、本発明の多槽式オゾン処理槽は、前述した通り複数の密閉した槽から構成されているので、充分なオゾン処理時間を少ないスペースで確保することが可能となる。そのため、汚泥とオゾンとの接触時間が長くとれ、なおかつ密閉空間での圧力負荷条件下での効率よいオゾンと汚泥との反応のために、循環槽での負荷を軽減することができる。
That is, in the present invention using a multi-tank type ozone treatment tank, when solubilization is promoted while circulating from the multi-tank type ozone treatment tank to the circulation tank and from the circulation tank to the multi-tank type ozone treatment tank of the present invention. The surplus sludge partially solubilized from the ozone treatment tank is retained under the blowing of compressed air in the circulation tank, so that the solubilization is promoted and returned to the multi-tank ozone tank. By repeating this circulation process for a predetermined time (or a predetermined number of times), a significant portion of the excess sludge is solubilized (solubilization complete). When the circulation tank is multistaged as shown in FIG. 1, the sludge that has been sequentially processed is transferred to the next room while overflowing.
At this time, since the multi-tank type ozone treatment tank of the present invention is composed of a plurality of sealed tanks as described above, a sufficient ozone treatment time can be secured in a small space. Therefore, the contact time between the sludge and ozone can be long, and the load in the circulation tank can be reduced for efficient reaction between ozone and sludge under pressure load conditions in the sealed space.
また、循環槽では、温度調整された圧縮空気が常に散気されており、熟成している（可溶化が促進している状態の）余剰汚泥からオゾンを脱気して、脱オゾン槽によりオゾンを吸着して排気している。 Moreover, in the circulation tank, the temperature-adjusted compressed air is constantly diffused, ozone is degassed from the excess sludge that is aged (in a state where solubilization is promoted), and the ozone is removed by the ozone removal tank. Is adsorbed and exhausted.
循環時間（循環回数）は、所望の余剰汚泥の可溶化の程度、オゾンの添加量により適宜決定され特に限定されるものではない。また、本発明による可溶化の程度（可溶化完了または熟成終了）も特に限定されるものではないが、本発明の好ましい実施形態では、実質的に全ての余剰汚泥を可溶化する。 The circulation time (number of circulations) is appropriately determined depending on the desired degree of solubilization of excess sludge and the amount of ozone added, and is not particularly limited. Further, the degree of solubilization according to the present invention (solubilization completion or ripening completion) is not particularly limited, but in a preferred embodiment of the present invention, substantially all excess sludge is solubilized.
（生物処理工程（工程（ｅ））
このようにして所望の可溶化の程度まで可溶化した（可溶化を完了した）余剰汚泥は、生物処理槽（第１曝気層または流量調整槽）に戻され再び生物処理に供せられる。
すなわち、本発明で処理された余剰汚泥は、有意に（好ましくは実質的全て）可溶化されており、細胞壁や細胞膜を持っておらず、微生物のほとんど死滅しておりある程度の低分子化が進んだ状態、すなわちＢＯＤ源として扱える状態である。
したがって、可溶化を完了した余剰汚泥は、生物処理にて好気的に炭酸ガスと水とに分解される。
(Biological treatment process (process (e))
The surplus sludge solubilized to the desired level of solubilization (completed solubilization) is returned to the biological treatment tank (first aeration layer or flow rate adjustment tank) and again subjected to biological treatment.
That is, the surplus sludge treated in the present invention is significantly (preferably substantially all) solubilized, has no cell wall or cell membrane, and most of the microorganisms have been killed, and a certain degree of molecular weight reduction has progressed. This is a state that can be handled as a BOD source.
Therefore, the surplus sludge that has been solubilized is decomposed aerobically into carbon dioxide and water in biological treatment.
このようにして、可溶化を完了した余剰汚泥を生物処理槽に搬送した後、再び工程（ａ）、（ｂ）に戻り、次の余剰汚泥の可溶化処理を行う。
このようにバッチ式に余剰汚泥の可溶化処理を行うことによって、汚泥貯留槽に滞留している余剰汚泥を実質的全て可溶化して再び生物処理が施される。
そのため、ワンパスでオゾン処理を行う従来技術の汚泥の可溶化が約５０％であるのに対して実質的に１００％の汚泥を可溶化させることが可能となる。
In this way, after the surplus sludge that has been solubilized is transported to the biological treatment tank, the process returns to the steps (a) and (b) again, and the next surplus sludge is solubilized.
By solubilizing the surplus sludge in a batch manner in this way, the surplus sludge staying in the sludge storage tank is substantially all solubilized and biological treatment is performed again.
Therefore, it is possible to substantially solubilize 100% of sludge, whereas the solubilization of sludge of the prior art that performs ozone treatment in one pass is about 50%.
以上説明した通り、本発明の余剰汚泥可溶化装置及び可溶化方法によると、オゾン処理した余剰汚泥をオゾン処理槽と循環槽との間を所定時間（所定回数）循環処理するので、所望の程度（好ましくは実質的全て）余剰汚泥を可溶化することができる。しかも、本発明において、オゾン処理槽が、上述した構成の多槽式に構成されているので、オゾンの消費量を１槽式のオゾン処理槽と比較して少なくすることが可能となる。また、オゾン処理した余剰汚泥を本発明の多槽式オゾン処理槽と循環槽との間を所定時間（所定回数）循環処理することにより、オゾン処理槽の容積を少なくすることができる。
そのため、既存の有機性排液処理システムに容易に組み込むことが可能となる。
As described above, according to the surplus sludge solubilization apparatus and the solubilization method of the present invention, the surplus sludge that has been subjected to ozone treatment is circulated between the ozone treatment tank and the circulation tank for a predetermined time (predetermined number of times). Excess sludge can be solubilized (preferably substantially all). In addition, in the present invention, the ozone treatment tank is configured in the multi-tank type having the above-described configuration, so that it is possible to reduce the consumption of ozone as compared with the single tank type ozone treatment tank. Moreover, the volume of the ozone treatment tank can be reduced by circulating the surplus sludge treated with ozone between the multi-tank ozone treatment tank of the present invention and the circulation tank for a predetermined time (predetermined number of times).
Therefore, it can be easily incorporated into an existing organic drainage treatment system.
なお、本発明の多槽式オゾン処理装置は、上記の汚泥処理システムに組み込み可能であるだけでなく、例えば従来技術で説明したオゾン処理を用いた汚泥処理システムにも活用可能である。
従って本発明は、オゾン処理によって有機性排液由来の汚泥を減容化するためのオゾン処理槽であって、
前記オゾン処理槽は、「処理槽本体を垂直方向で区切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を搬出するための搬出管を有しており、そして前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有している、ことを特徴とする余剰汚泥可溶化装置用のオゾン処理槽。」まで拡張される。
The multi-tank type ozone treatment apparatus of the present invention can be incorporated not only in the above-described sludge treatment system but also in a sludge treatment system using ozone treatment described in the prior art, for example.
Therefore, the present invention is an ozone treatment tank for reducing the volume of sludge derived from organic waste liquid by ozone treatment,
The ozone treatment tank is composed of “a plurality of treatment tanks obtained by dividing the treatment tank body in the vertical direction,
The first treatment tank among the plurality of treatment tanks introduces sludge and ozone introduction means provided extending in the vertical direction of the treatment tank main body for introducing ozone generated by the ozone generation means. And a communication pipe for transporting the sludge to be treated with ozone to the next treatment tank, and the last treatment tank of the plurality of treatment tanks is from the previous treatment tank. It has a communication pipe for introducing sludge and a discharge pipe for carrying out sludge, and the intermediate treatment tank among the plurality of treatment tanks is for introducing sludge from the previous treatment tank. An ozone treatment tank for an excess sludge solubilizer, comprising a communication pipe and a communication pipe for carrying out sludge to a subsequent treatment tank. To be expanded.
１０１ 流量調整槽
１０２、１０３ 曝気槽
１０４ 沈殿槽
１０５ 汚泥濃縮貯留槽
１０６ 汚泥貯留槽
１ オゾン処理槽
１ａ,１ｂ,１ｃ,１ｄ 第１〜第４処理槽
２ 循環槽
３ 脱オゾン槽
DESCRIPTION OF SYMBOLS 101 Flow control tank 102,103 Aeration tank 104 Precipitation tank 105 Sludge concentration storage tank 106 Sludge storage tank 1 Ozone treatment tank 1a, 1b, 1c, 1d 1st-4th treatment tank 2 Circulation tank
3 Deodorization tank
Claims (3)
前記汚泥貯留槽からの余剰汚泥を計量添加するための計量添加手段と、計量添加した余剰汚泥をオゾン処理するためのオゾン発生手段とを有するオゾン処理槽と、
前記オゾン処理槽と前記余剰汚泥を循環可能に接続された循環槽であって、オゾン処理した余剰汚泥を散気手段により圧縮空気を散気しながら前記オゾン処理槽と循環槽との間を所定時間循環させて熟成処理して前記余剰汚泥の可溶化を完了し、そして可溶化を完了した余剰汚泥を前記生物処理槽側に戻す循環槽と、
前記循環槽に接続され、前記循環槽で発生するオゾンを含む気体からオゾンを吸着するための脱オゾン槽と、
から構成され、
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、前記汚泥貯留槽および前記循環槽からの汚泥を導入するための汚泥導入手段と、前記処理槽側からの汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を循環槽に搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置。 Excess sludge solubilization to reduce excess sludge in an organic drainage treatment system including a biological treatment tank for biological treatment of organic waste liquid and a sludge storage tank for storing surplus sludge generated during biological treatment A device,
An ozone treatment tank having metering addition means for metering and adding surplus sludge from the sludge storage tank, and ozone generating means for ozone treatment of the metered surplus sludge;
A circulation tank connected to be able to circulate the ozone treatment tank and the excess sludge, and the ozone treatment tank and the circulation tank are predetermined between the ozone treatment tank and the circulation tank while the compressed air is diffused by the aeration means. A circulation tank that circulates for a period of time to complete solubilization of the surplus sludge, and returns the surplus sludge that has been solubilized to the biological treatment tank side,
A deozonation tank connected to the circulation tank and for adsorbing ozone from a gas containing ozone generated in the circulation tank;
Consisting of
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks includes an ozone introduction means provided extending in a vertical direction of the treatment tank body for introducing ozone generated by the ozone generation means, and the sludge storage tank. And sludge introduction means for introducing sludge from the circulation tank, sludge introduction means for introducing sludge from the treatment tank side, and communication for transporting the sludge to be treated with ozone to the next treatment tank A tube and
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge to the circulation tank, and the plurality of treatment tanks The treatment tank in the middle of the treatment tank has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
A surplus sludge solubilization apparatus characterized in that the sludge introduced into the first treatment tank together with ozone is liquid-tightly pumped to the next treatment apparatus and discharged from the last treatment tank.
前記汚泥貯留槽からの余剰汚泥を計量添加するための計量添加手段と、計量添加した余剰汚泥をオゾン処理するためのオゾン発生手段とを有するオゾン処理槽と、
前記オゾン処理槽と前記余剰汚泥を循環可能に接続された循環槽であって、オゾン処理した余剰汚泥を散気手段により圧縮空気を散気しながら前記オゾン処理槽と循環槽との間を所定時間循環させて熟成処理して前記余剰汚泥の可溶化を完了し、そして可溶化を完了した余剰汚泥を前記生物処理槽側に戻す循環槽と、
前記循環槽に接続され、前記循環槽で発生するオゾンを含む気体からオゾンを吸着するための脱オゾン槽と、
から構成された余剰汚泥可溶化装置におけるオゾン処理槽であって、
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、前記汚泥貯留槽および前記循環槽からの汚泥を導入するための汚泥導入手段と、前記処理槽側からの汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を循環槽に搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置用のオゾン処理槽。 Excess sludge solubilization to reduce excess sludge in an organic drainage treatment system including a biological treatment tank for biological treatment of organic waste liquid and a sludge storage tank for storing surplus sludge generated during biological treatment A device,
An ozone treatment tank having metering addition means for metering and adding surplus sludge from the sludge storage tank, and ozone generating means for ozone treatment of the metered surplus sludge;
A circulation tank connected to be able to circulate the ozone treatment tank and the excess sludge, and the ozone treatment tank and the circulation tank are predetermined between the ozone treatment tank and the circulation tank while the compressed air is diffused by the aeration means. A circulation tank that circulates for a period of time to complete solubilization of the surplus sludge, and returns the surplus sludge that has been solubilized to the biological treatment tank side,
A deozonation tank connected to the circulation tank and for adsorbing ozone from a gas containing ozone generated in the circulation tank;
It is an ozone treatment tank in an excess sludge solubilization device composed of:
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks includes an ozone introduction means provided extending in a vertical direction of the treatment tank body for introducing ozone generated by the ozone generation means, and the sludge storage tank. And sludge introduction means for introducing sludge from the circulation tank, sludge introduction means for introducing sludge from the treatment tank side, and communication for transporting the sludge to be treated with ozone to the next treatment tank A tube and
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge to the circulation tank, and the plurality of treatment tanks The treatment tank in the middle of the treatment tank has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
An ozone treatment tank for an excess sludge solubilizer, wherein the sludge introduced together with ozone into the first treatment tank is pumped in a liquid-tight manner and discharged from the last treatment tank.
前記オゾン処理槽は、密閉式の処理槽本体を垂直方向に液密に仕切った複数の処理槽からなり、
前記複数の処理槽のうちの最初の処理槽は、前記オゾン発生手段で発生したオゾンを導入するための前記処理槽本体の垂直方向に延長されて設けられたオゾン導入手段と、汚泥を導入するための汚泥導入手段と、前記オゾン処理する汚泥を次の処理槽へ搬送するための連通管とを有しており、
前記複数の処理槽のうち最後の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、汚泥を搬出するための搬出管を有しており、そして
前記複数の処理槽のうち途中の処理槽は、前段の処理槽からの汚泥を導入するための連通管と、後段の処理槽に汚泥を搬出するための連通管を有しており、
前記最初の処理槽にオゾンとともに導入した汚泥を、液密に次段の処理装置圧送して最後の処理槽から排出することを特徴とする余剰汚泥可溶化装置用のオゾン処理槽。 An ozone treatment tank for reducing the volume of sludge derived from organic drainage by ozone treatment,
The ozone treatment tank is composed of a plurality of treatment tanks in which a sealed treatment tank body is liquid-tightly partitioned in the vertical direction.
The first treatment tank among the plurality of treatment tanks introduces sludge and ozone introduction means provided extending in the vertical direction of the treatment tank main body for introducing ozone generated by the ozone generation means. And a communication pipe for conveying the ozone-treated sludge to the next treatment tank,
The last treatment tank among the plurality of treatment tanks has a communication pipe for introducing sludge from a previous treatment tank, and a discharge pipe for carrying out sludge, and the plurality of treatment tanks Among them, the treatment tank in the middle has a communication pipe for introducing the sludge from the previous treatment tank and a communication pipe for carrying out the sludge to the subsequent treatment tank.
An ozone treatment tank for an excess sludge solubilizer, wherein the sludge introduced together with ozone into the first treatment tank is pumped in a liquid-tight manner and discharged from the last treatment tank.
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