JP4023715B2 - Wastewater treatment system - Google Patents
Wastewater treatment system Download PDFInfo
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- JP4023715B2 JP4023715B2 JP2001375636A JP2001375636A JP4023715B2 JP 4023715 B2 JP4023715 B2 JP 4023715B2 JP 2001375636 A JP2001375636 A JP 2001375636A JP 2001375636 A JP2001375636 A JP 2001375636A JP 4023715 B2 JP4023715 B2 JP 4023715B2
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- tank
- nitrification
- denitrification
- polyphenols
- wastewater
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- 238000004065 wastewater treatment Methods 0.000 title claims description 11
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 27
- 235000013824 polyphenols Nutrition 0.000 claims description 27
- 241000894006 Bacteria Species 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 7
- 241000228143 Penicillium Species 0.000 claims description 5
- 241000216766 Penicillium sp. CGMCC-0816 Species 0.000 claims description 3
- 230000000593 degrading effect Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 20
- 239000010802 sludge Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 239000002351 wastewater Substances 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 239000000126 substance Substances 0.000 description 5
- 244000005700 microbiome Species 0.000 description 3
- 230000001546 nitrifying effect Effects 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000010840 domestic wastewater Substances 0.000 description 2
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 domestic wastewater Chemical compound 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Biological Treatment Of Waste Water (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、生活廃水、食品加工廃水、ディスポーザー廃水等の、窒素分の他に着色原因物質であるポリフェノール類を含む有機性廃水の処理に適した廃水処理システムに関するものである。
【０００２】
【従来の技術】
上記のような窒素分を含む廃水の処理方法としては、従来から活性汚泥法が広く用いられている。この方法は、曝気槽内に空気または酸素を吹き込み、好気性微生物の働きにより廃水中の有機分を酸化分解させる処理方法である。この方法において活性汚泥は溶解性有機物の吸着、分解、凝集沈殿などの機能を果たす。しかしこの活性汚泥法は長い処理時間を必要とするうえ、その内部で進行する食物連鎖が短いために大量の活性汚泥が発生し、その沈降分離や汚泥処理に多くの時間と手数を要するという問題があった。しかもこの方法に用いられる好気性微生物は易分解性有機物のみを硝化し、難分解性有機物でありまた着色原因物質でもあるポリフェノール類を分解することができないため、処理水が着色しているという問題があった。
【０００３】
このほか、硝化液循環が行なわれる脱窒槽と硝化槽とを用いて廃水中の窒素を除去する生物学的窒素除去法も広く実用化されている。この方法は、廃水中のアンモニア態窒素を後段の硝化槽で硝酸態窒素とし、この硝化液を前段の脱窒槽に循環させて脱窒する方法である。この生物学的窒素除去法では、脱窒槽で処理された廃水が硝化槽に流入することとなる。しかし上記のようなポリフェノール類を含む有機性廃水を処理すると、脱窒槽からの流出水（硝化槽への流入水）中にＢＯＤが多く残留し、硝化槽での硝化効率が悪化して脱窒効率も低下するという問題があった。
【０００４】
【発明が解決しようとする課題】
本発明は上記した従来の問題点を解決し、窒素分の他に着色原因物質であるポリフェノール類を含む有機性廃水をも高度に処理し、脱色された処理水とすることができる脱窒効率の高い新規な廃水処理システムを提供するためになされたものである。また本発明の他の目的は、処理時間が短く、活性汚泥法のように大量の汚泥を発生させることもない廃水処理システムを提供することである。
【０００５】
【課題を解決するための手段】
上記の課題を解決するためになされた本発明の廃水処理システムは、硝化液循環が行なわれる脱窒槽と硝化槽との間に、ポリフェノール分解菌であるペニシリウム - ゲアストリボルス（ Penicillium geastrivorus ）ＮＭ１０ｂ株（寄託番号ＦＥＲＭ Ｐ - １８１６６）を固定した流動担体が投入されたポリフェノール類処理槽を設け、このポリフェノール類処理槽で脱窒槽からの流出水中に含有されるＢＯＤの高度除去を行なわせることを特徴とするものである。
【０００６】
本発明で用いられる上記したペニシリウム-ゲアストリボルス（Penicillium geastrivorus）ＮＭ１０ｂ株は、出願人により特許生物寄託センターにＦＥＲＭ Ｐ−１８１６６として寄託済みである。
【０００７】
本発明は硝化工程と脱窒工程とからなる生物学的窒素除去を基本とするものであるが、脱窒槽と硝化槽との間にポリフェノール分解菌を固定した流動担体が投入されたポリフェノール類処理槽を設け、このポリフェノール類処理槽で脱窒槽からの流出水中に含有されるＢＯＤの高度除去を行なわせるため、硝化槽において硝化菌がＢＯＤにより阻害されることがなく、高い硝化効率を達成することができる。このため従来よりも脱窒効率を向上させることができ、また着色原因物質であるポリフェノール類が分解されるため、脱色された処理水を得ることができる。
【０００８】
【発明の実施の形態】
以下に本発明の好ましい実施形態を示す。
図１は本発明の実施形態を示すもので、１は生活廃水、食品加工廃水、ディスポーザー廃水等の窒素分の他に着色原因物質であるポリフェノール類を含む原水が流入する最初沈殿池である。この最初沈殿池１において、原水中のＳＳ等が初沈汚泥として分離される。
【０００９】
２は最初沈殿池１からの流出水が入る脱窒槽、３はその後段に設置された硝化槽であり、本発明ではそれらの間にポリフェノール類処理槽４が設置されている。これらの脱窒槽２と硝化槽３は従来から用いられていたものと特に変わるところはなく、従来と同様に循環経路８を介して硝化槽３から脱窒槽２への硝化液循環が行なわれている。脱窒槽２には攪拌機９が設けられており、硝化槽３とポリフェノール類処理槽４には散気手段１０が設けられている。
【００１０】
図示のように脱窒槽２には脱窒菌が固定された流動担体５を，また硝化槽３には硝化菌が固定された流動担体６をそれぞれ投入しておくことが好ましい。なお各槽における担体充填率は、槽容量に対して５〜２０容積％とし、脱窒槽２と硝化槽３の処理時間は１〜３時間程度とすることが好ましい。またポリフェノール類処理槽４の処理時間は２〜６時間程度とし、全体の処理時間を４〜１２時間とすることが好ましい。
【００１１】
ポリフェノール類処理槽４には、ポリフェノール分解菌を固定した流動担体７が投入されている。ポリフェノール分解菌としては、ペニシリウム-ゲアストリボルス（Penicillium geastrivorus）ＮＭ１０ｂ株を用いるものとする。この線菌目ペニシリウム属に属する菌株は、従来の好気性微生物が分解できなかったポリフェノール類を水中において特異的に分解する能力を有するものであり、既に特許生物寄託センターにＦＥＲＭ Ｐ−１８１６６として寄託済みである。
【００１２】
このように構成された本発明の廃水処理システムにおいては、従来と同様に硝化液循環による生物学的窒素除去が行なわれるのであるが、脱窒槽２からの流出水に含まれる難分解性有機物であるポリフェノール類は、ポリフェノール類処理槽４内のポリフェノール分解菌によって分解除去される。このため、その後段の硝化槽３にはポリフェノール類を主体とするＢＯＤが流入することがなく、高い硝化効率が達成され、従ってまた高い脱窒効率が達成されることとなる。
【００１３】
このように本発明の廃水処理システムでは活性汚泥を使用しないため、汚泥発生量を大幅に削減することができる。特に流動担体を用いることにより食物連鎖を長くし、上位の菌体が下位の菌体を分解させるようにすることによって、汚泥発生量をより少なくすることができる。また流動担体を用いることにより槽内の菌体濃度を高め、処理時間を短縮することができる。
次に本発明の実施例を示す。
【００１４】
【実施例】
槽容量０.６ｍ3の脱窒槽と、槽容量０.４ｍ3のポリフェノール類処理槽と、槽容量０.６ｍ3の硝化槽とを図１の通り配置し、表１に示した原水の処理を行った。各槽には流動担体が５容積％ずつ投入されており、ポリフェノール類処理槽の流動担体にはポリフェノール分解菌であるペニシリウム-ゲアストリボルスＮＭ１０ｂ株を担持させた。処理水量は４.８ｍ3/ｄａｙであり、全体の処理時間は８時間、硝化液循環率は原水の１５０％とした。その結果を、表１に示した。また比較のために、同一の原水を標準活性汚泥法により処理した結果も示した。
【００１５】
【表１】
表１のデータに示されるように、本発明の廃水処理システムによれば、窒素除去率が６０％（標準活性汚泥法では３０％）、ＴＯＣ除去率が９３％（標準活性汚泥法では８６％）、ＢＯＤ除去率が９７％（標準活性汚泥法では９５％）となり、いずれも従来よりも優れた結果を示した。また標準活性汚泥法では３０までしか低下させることができなかった色度を１０にまで低下させることができ、ほぼ無色の処理水とすることができた。
【００１７】
【発明の効果】
以上に説明したように、本発明の廃水処理システムによれば、着色原因物質であるポリフェノール類を含む有機性廃水を高度に処理し、脱色された処理水とすることができる。しかも本発明の廃水処理システムは、脱窒効率が高く、処理時間が短く、活性汚泥法のように大量の汚泥を発生させることもない等の多くの利点を有するものである。
【図面の簡単な説明】
【図１】本発明の実施形態の説明図である。
【符号の説明】
１ 最初沈殿池、２ 脱窒槽、３ 硝化槽、４ ポリフェノール類処理槽、５脱窒菌が固定された流動担体、６ 硝化菌が固定された流動担体、７ ポリフェノール分解菌を固定した流動担体、８ 循環経路、９ 攪拌機、１０ 散気手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wastewater treatment system suitable for treating organic wastewater containing polyphenols which are coloring cause substances in addition to nitrogen, such as domestic wastewater, food processing wastewater, and disposer wastewater.
[0002]
[Prior art]
As a method for treating wastewater containing nitrogen as described above, an activated sludge method has been widely used. This method is a treatment method in which air or oxygen is blown into an aeration tank, and organic components in wastewater are oxidatively decomposed by the action of aerobic microorganisms. In this method, activated sludge performs functions such as adsorption, decomposition, and coagulation sedimentation of soluble organic matter. However, this activated sludge method requires a long treatment time, and a large amount of activated sludge is generated due to the short food chain in the interior, requiring a lot of time and labor for the sedimentation and sludge treatment. was there. In addition, the aerobic microorganism used in this method nitrifies only readily decomposable organic matter and cannot decompose polyphenols that are hardly decomposable organic matter and also cause coloration, so that the treated water is colored. was there.
[0003]
In addition, a biological nitrogen removal method for removing nitrogen in wastewater using a denitrification tank in which nitrification liquid circulation is performed and a nitrification tank has been widely put into practical use. In this method, ammonia nitrogen in waste water is converted to nitrate nitrogen in a subsequent nitrification tank, and the nitrification liquid is circulated to the previous denitrification tank for denitrification. In this biological nitrogen removal method, the waste water treated in the denitrification tank flows into the nitrification tank. However, when organic wastewater containing polyphenols as described above is treated, a large amount of BOD remains in the effluent from the denitrification tank (inflow water to the nitrification tank), and the nitrification efficiency in the nitrification tank deteriorates and denitrification occurs. There was a problem that efficiency was also lowered.
[0004]
[Problems to be solved by the invention]
The present invention solves the above-mentioned conventional problems, and denitrification efficiency that can highly treat organic wastewater containing polyphenols that are coloring-causing substances in addition to nitrogen content to obtain decolorized treated water. It was made in order to provide a new wastewater treatment system with high quality. Another object of the present invention is to provide a wastewater treatment system that has a short treatment time and does not generate a large amount of sludge as in the activated sludge method.
[0005]
[Means for Solving the Problems]
The wastewater treatment system of the present invention, which has been made to solve the above-described problems, includes a penicillium - geastribols ( Penicillium) which is a polyphenol-degrading bacterium between a denitrification tank in which nitrification liquid circulation is performed and a nitrification tank. geastrivorus ) A polyphenols treatment tank into which a fluid carrier fixed with NM10b strain (deposit number FERMP P - 18166) is placed is provided, and BOD contained in the effluent from the denitrification tank is removed at a high level in this polyphenols treatment tank. It is characterized by making it.
[0006]
The above-mentioned Penicillium-geastrivorus NM10b strain used in the present invention has been deposited as FERM P-18166 by the applicant at the Patent Organism Depositary.
[0007]
The present invention is based on biological nitrogen removal consisting of a nitrification step and a denitrification step, but a polyphenol treatment in which a fluid carrier in which a polyphenol-degrading bacterium is fixed is inserted between the denitrification vessel and the nitrification vessel. A tank is provided, and BOD contained in the effluent water from the denitrification tank is highly removed in this polyphenol treatment tank, so that nitrifying bacteria are not inhibited by BOD in the nitrification tank, and high nitrification efficiency is achieved. be able to. For this reason, the denitrification efficiency can be improved as compared with the prior art, and since the polyphenols that are the color-causing substances are decomposed, decolorized treated water can be obtained.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention are shown below.
FIG. 1 shows an embodiment of the present invention. Reference numeral 1 denotes an initial settling basin into which raw water containing polyphenols which are coloring causative substances in addition to nitrogen content such as domestic wastewater, food processing wastewater, and disposer wastewater flows. In the first settling basin 1, SS and the like in the raw water are separated as the first settling sludge.
[0009]
[0010]
As shown in the figure, it is preferable to put a
[0011]
The polyphenol processing tank 4 is loaded with a
[0012]
In the wastewater treatment system of the present invention configured as described above, biological nitrogen removal by nitrification liquid circulation is performed in the same manner as in the prior art. Certain polyphenols are decomposed and removed by polyphenol-degrading bacteria in the polyphenol processing tank 4. For this reason, BOD mainly composed of polyphenols does not flow into the
[0013]
Thus, since the activated water sludge is not used in the wastewater treatment system of the present invention, the amount of sludge generated can be greatly reduced. In particular, the amount of sludge generated can be reduced by using a fluid carrier to lengthen the food chain and allow the upper cells to decompose the lower cells. Further, by using a fluid carrier, the bacterial cell concentration in the tank can be increased and the treatment time can be shortened.
Next, examples of the present invention will be described.
[0014]
【Example】
And denitrification tank volume 0.6 m 3, and polyphenols treatment tank of the tank volume 0.4 m 3, a nitrification tank of the tank volume 0.6 m 3 arranged as in FIG. 1, the processing of raw water as shown in Table 1 Went. Each tank was charged with 5% by volume of a fluid carrier, and the fluid carrier in the polyphenols treatment tank was loaded with Penicillium-Geastribols NM10b strain, which is a polyphenol-degrading bacterium. The amount of treated water was 4.8 m 3 / day, the total treatment time was 8 hours, and the nitrification liquid circulation rate was 150% of raw water. The results are shown in Table 1. For comparison, the results of treating the same raw water by the standard activated sludge method are also shown.
[0015]
[Table 1]
As shown in the data of Table 1, according to the wastewater treatment system of the present invention, the nitrogen removal rate is 60% (30% in the standard activated sludge method), and the TOC removal rate is 93% (86% in the standard activated sludge method). ), The BOD removal rate was 97% (95% in the standard activated sludge method), and all showed results superior to those of the prior art. In addition, the chromaticity that could only be reduced to 30 in the standard activated sludge method could be reduced to 10 and the treated water could be made almost colorless.
[0017]
【The invention's effect】
As described above, according to the wastewater treatment system of the present invention, organic wastewater containing polyphenols that are color-causing substances can be highly treated to obtain decolorized treated water. Moreover, the wastewater treatment system of the present invention has many advantages such as high denitrification efficiency, short treatment time, and no generation of a large amount of sludge as in the activated sludge method.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 First sedimentation basin, 2 Denitrification tank, 3 Nitrification tank, 4 Polyphenol processing tank, 5 Fluid carrier to which denitrifying bacteria are fixed, 6 Fluid carrier to which nitrifying bacteria are immobilized, 7 Fluid carrier to which polyphenol degrading bacteria are immobilized, 8 Circulation path, 9 agitator, 10 aeration means
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001375636A JP4023715B2 (en) | 2001-12-10 | 2001-12-10 | Wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001375636A JP4023715B2 (en) | 2001-12-10 | 2001-12-10 | Wastewater treatment system |
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| Publication Number | Publication Date |
|---|---|
| JP2003170190A JP2003170190A (en) | 2003-06-17 |
| JP4023715B2 true JP4023715B2 (en) | 2007-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2001375636A Expired - Fee Related JP4023715B2 (en) | 2001-12-10 | 2001-12-10 | Wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5061315B2 (en) * | 2007-09-04 | 2012-10-31 | 独立行政法人酒類総合研究所 | Microorganisms that decolorize molasses pigment and decolorization treatment method using the same |
| JP2012125702A (en) * | 2010-12-15 | 2012-07-05 | Tsukishima Kikai Co Ltd | Water treatment apparatus |
| CN103755037B (en) * | 2013-12-12 | 2015-05-13 | 北京师范大学 | Fixed adsorption tube reactor used for treating high-salinity phosphorus-deficient organic chemical waste water |
| CN110981092B (en) * | 2019-12-11 | 2021-12-24 | 中煤科工集团杭州研究院有限公司 | Biological phenol-reducing denitrification system and method for coal chemical wastewater |
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