JPH01207199A - Waste water treatment - Google Patents
Waste water treatmentInfo
- Publication number
- JPH01207199A JPH01207199A JP63032334A JP3233488A JPH01207199A JP H01207199 A JPH01207199 A JP H01207199A JP 63032334 A JP63032334 A JP 63032334A JP 3233488 A JP3233488 A JP 3233488A JP H01207199 A JPH01207199 A JP H01207199A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- alkaline
- recovered
- biological treatment
- regenerating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004065 wastewater treatment Methods 0.000 title claims description 8
- 239000007788 liquid Substances 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 230000001172 regenerating effect Effects 0.000 claims abstract description 10
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 10
- 239000002351 wastewater Substances 0.000 claims abstract description 9
- 239000003463 adsorbent Substances 0.000 claims abstract description 8
- 239000010802 sludge Substances 0.000 claims abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 7
- 230000002378 acidificating effect Effects 0.000 claims abstract description 4
- 239000012670 alkaline solution Substances 0.000 claims description 10
- 230000001877 deodorizing effect Effects 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 4
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 230000009965 odorless effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 238000004332 deodorization Methods 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 5
- 238000005189 flocculation Methods 0.000 abstract description 2
- 230000016615 flocculation Effects 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 1
- 239000008394 flocculating agent Substances 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000000463 material Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010800 human waste Substances 0.000 description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000003957 anion exchange resin Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、廃水を生物処理槽で活性汚泥により生物処理
し、生物処理後の処理水を限外ろ過器により固液分離し
、前記限外ろ過器にてろ過した処理水に含まれるＣＯＤ
の原因となる成分及び色度の原因となる成分を、アルカ
リ液によって再生可能な吸着剤への吸着によって除去し
て浄化水を回収し、他方、アルカリ液でアルカリ域にｐ
Ｈ調整する脱臭塔において、前記生物処理槽等から発生
する酸性ガスをアルカリ次亜塩と反応させて無臭化する
廃水処理方法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention provides biological treatment of wastewater using activated sludge in a biological treatment tank, and solid-liquid separation of the treated water after the biological treatment using an ultrafilter. COD contained in treated water filtered with an external filter
Purified water is recovered by removing components that cause color and components that cause chromaticity by adsorption onto an adsorbent that can be regenerated using an alkaline solution.
The present invention relates to a wastewater treatment method in which acidic gas generated from the biological treatment tank or the like is reacted with alkaline hypochlorite to deodorize it in a deodorization tower for H adjustment.
従来、アルカリ液で前記吸着剤を再生して得た再生廃液
は、そのまま廃棄していると共に、脱臭塔では、吸着剤
の再生のために使用するアルカリとは別に、アルカリ液
を使用していた。Conventionally, the regenerated waste liquid obtained by regenerating the adsorbent with alkaline liquid was disposed of as is, and the alkaline liquid was used in the deodorizing tower separately from the alkali used to regenerate the adsorbent. .
しかし、廃棄する再生廃液は強アルカリ性になっている
ために、２次公害が生じやすいばかりか、全体として使
用する薬品の量が多くてランニングコストが高くつく欠
点があった。However, since the regenerated waste liquid to be disposed of is strongly alkaline, it not only tends to cause secondary pollution, but also has the disadvantage that the amount of chemicals used is large, resulting in high running costs.
本発明の目的は、２次公害少なく、しかも、使用する薬
品の量を少なくできるようにする点にある。An object of the present invention is to reduce secondary pollution and to reduce the amount of chemicals used.
本発明の廃水処理方法の特徴手段は、アルカリ液で吸着
剤を再生して得た再生廃液から逆浸透膜によってアルカ
リ液を分離回収し、その回収したアルカリ液を脱臭塔で
ｐＨ調整するために有効利用することにあり、その作用
効果は、次の通りである。The characteristic means of the wastewater treatment method of the present invention is that the alkaline liquid is separated and recovered from the regenerated waste liquid obtained by regenerating the adsorbent with the alkaline liquid using a reverse osmosis membrane, and the pH of the recovered alkaline liquid is adjusted in a deodorizing tower. The purpose is to utilize it effectively, and its effects are as follows.
つまり、逆浸透膜によって再生廃液からアルカリ液が除
去されて２次公害が生じにくく、しかも再処理も行いや
すくなると共に、回収したアルカリ液を脱臭塔で利用す
ることによって、廃水処理全体として必要なアルカリ液
の量を少なくできる。In other words, the reverse osmosis membrane removes the alkaline liquid from the recycled waste liquid, making it difficult to cause secondary pollution and making it easier to reprocess.By using the recovered alkaline liquid in the deodorizing tower, it becomes necessary for the overall wastewater treatment. The amount of alkaline solution can be reduced.
〔発明の効果〕
従って、廃水処理全体としての薬品の使用量を減少でき
て、経済的に有利になった。[Effects of the Invention] Therefore, the amount of chemicals used for wastewater treatment as a whole can be reduced, which is economically advantageous.
次に、本発明の実施例を、図面に基づいて説明する。 Next, embodiments of the present invention will be described based on the drawings.
し尿等の高濃度有機性の廃水を、生物処理槽（１）で活
性汚泥により硝化、脱窒等の生物処理を行い、生物処理
後の処理水を、ポンプ（Ｐ）によって限外ろ過器（２）
に供給し、その限外ろ過器（２）′により処理水を固液
分離して、ろ過した処理水は活性炭を充填した吸着塔（
３）に送ると共に、分離された固形分としての汚泥は、
返送路（４）を介して一部が生物処理槽（１）に返送さ
れ、且つ、残部が余剰汚泥として引抜かれる。Highly concentrated organic wastewater such as human waste is subjected to biological treatment such as nitrification and denitrification using activated sludge in a biological treatment tank (1), and the treated water after biological treatment is passed through an ultrafilter ( 2)
The treated water is supplied to the ultrafilter (2)' for solid-liquid separation, and the filtered treated water is passed through an adsorption tower (2) filled with activated carbon.
3), and the separated solid sludge is
A portion of the sludge is returned to the biological treatment tank (1) via the return path (4), and the remainder is withdrawn as surplus sludge.
前記吸着塔（３）では、アルカリ液によって再生可能な
０．４ｋｇ／ｌ以下（０，２３〜０．３５ｋｇ／ ｌ
）の充填密度のマクロポーラス状の活性炭を充填してあ
り、限外ろ過器（２）をろ過した処理水に含まれるＣＯ
Ｄの原因となる成分及び色度の原因となる成分を、吸着
によって除去して浄化水を得る。In the adsorption tower (3), 0.4 kg/l or less (0.23 to 0.35 kg/l) can be regenerated by alkaline liquid.
), the CO contained in the treated water filtered through the ultrafilter (2) is
The components that cause D and the components that cause chromaticity are removed by adsorption to obtain purified water.
そして、前記活性炭は定期的にアルカリ液（Ｎａ０１１
）で再生して再び使用し、そのアルカリ液（ＮａＯｌｌ
）で再生して得た再生廃液は再生廃液槽（５）で貯留し
、再生廃液槽（５）からの再生廃液をポンプ（Ｐ）によ
って逆浸透膜装置（６）に供給して、この逆浸透膜装置
（６）でＣＯＤの原因となる成分及び色度の原因となる
成分を含む有機廃水と、アルカリ液（ＮａＯｌｌ）とに
分離回収する。Then, the activated carbon is periodically added to the alkaline solution (Na011
) to regenerate and use it again, and use the alkaline solution (NaOll
) is stored in the recycled waste liquid tank (5), and the recycled waste liquid from the recycled waste liquid tank (5) is supplied to the reverse osmosis membrane device (6) by the pump (P). The osmotic membrane device (6) separates and collects organic wastewater containing components that cause COD and components that cause chromaticity, and an alkaline solution (NaOll).
他方、前記生物処理槽（１）から発生する酸性ガス（Ｈ
□Ｓ）を回収して脱臭塔（７）でアルカリ次亜塩（Ｎａ
Ｃ１０）により酸化反応させて無臭化し、脱臭塔（７）
ではｐｔ−ｔを１０程度に維持するためにアルカリ液（
Ｎａ０１１）を注入する。On the other hand, acidic gas (H
□S) is collected and deodorized to alkaline hyposalt (Na
C10) to make it odorless through an oxidation reaction, and the deodorizing tower (7)
Then, in order to maintain pt-t at around 10, add alkaline solution (
Inject Na011).
前記逆浸透膜装置（６）で分離回収した有機廃水中のＣ
ＯＤの原因となる成分及び色度の原因となる成分は、反
応槽（８）において塩化第二鉄（ＦｅＣｐ ３）等の凝
集剤で凝集反応させ、沈澱分離槽（９）で凝集物と上澄
水とに分離し、凝集物は生物処理槽（１）に返送する。C in the organic wastewater separated and recovered by the reverse osmosis membrane device (6)
The components that cause OD and the components that cause chromaticity are subjected to a flocculation reaction using a flocculant such as ferric chloride (FeCp 3) in a reaction tank (8), and then separated from the aggregates in a precipitation separation tank (9). It is separated into clear water and the aggregates are returned to the biological treatment tank (1).
また、逆浸透膜装置（６）からの回収アルカリ液（Ｎａ
０１１）は、脱臭塔（７）でｐＨ調整のために注入する
アルカリ液（ＮａＯＨ）として利用する。In addition, alkaline solution (Na) recovered from the reverse osmosis membrane device (6)
011) is used as an alkaline solution (NaOH) to be injected into the deodorizing tower (7) for pH adjustment.
前記吸着塔（３）での活性炭の再生方法は、主に２〜４
％のＮ ａ Ｏｔｌ溶液を活性炭の４〜５倍量を２〜３
時間通液するもので、具体的には、次の表に示した工程
順に行うものである。The method for regenerating activated carbon in the adsorption tower (3) is mainly 2 to 4.
% Na Otl solution and 4 to 5 times the amount of activated carbon to 2 to 3
The process is carried out in the order of steps shown in the table below.
尚、再生液の温度は６０〜８０℃が効率よく再生できる
。Note that efficient regeneration can be achieved at a temperature of the regenerating liquid of 60 to 80°C.
面、図中ＳＶは空塔速度を示し、１ｒｒｒの活性炭に１
ｔｒｉ／ｈｒの量で１ｌｌｌ液した時がＳＶ＝ １ｒ
ｒｒ／ｍ／ｈｒとし、図中の量は、通液量で活性炭量の
何倍かを示している。SV in the figure indicates the superficial velocity, and 1 rrr of activated carbon
SV = 1r when 1lll of liquid is poured at the amount of tri/hr
rr/m/hr, and the amount in the figure indicates how many times the amount of activated carbon is the amount of liquid passed through.
つまり、再生廃液としては７〜１０倍量であるが、特に
ＣＯＤ、色の濃い部分は、３〜５倍量であり、通液量全
体の約１１５０である。In other words, the amount of recycled waste liquid is 7 to 10 times the amount, but especially the COD, the dark colored part, is 3 to 5 times the amount, which is about 1150 times the total amount of liquid passed.
前記逆浸透膜装置（６）では、通常ルーズＲＯ膜と称さ
れる膜が使用され、アルカリ液を有機廃水と分離回収す
る。In the reverse osmosis membrane device (6), a membrane commonly called a loose RO membrane is used to separate and recover alkaline liquid from organic wastewater.
前記脱臭塔（７）でのＮａ０Ｉｌの使用量は、し尿１ｋ
ｌあたり約１ ｋｇであるが、活性炭再生時に使用する
ＮａＯＨは１ ｋｇで、同時に使用するＨＣｌとの反応
によるアルカリ減少分が０．４ｋｇで、残る有効なアル
カリ分（ＮａＯＨ）が０ 、６ ｋｇとなるために、脱
臭塔で使用するアルカリが０．４ｋｇに減少した。The amount of Na0Il used in the deodorizing tower (7) is 1k of human waste.
The amount of NaOH used during activated carbon regeneration is approximately 1 kg, and the alkali reduction due to the reaction with HCl used at the same time is 0.4 kg, and the remaining effective alkaline content (NaOH) is 0.6 kg. Therefore, the amount of alkali used in the deodorizing tower was reduced to 0.4 kg.
前記吸着剤としては、活性炭の他に、陰イオン交換樹脂
、両性樹脂等の有機物を吸着する機能を有するものであ
れば他のいかなるものであっても良く、また、アルカリ
液で再生しやすくするためには、ミクロポアーに冨んだ
ものよりは、マクロポーラス状のものの方が良い。In addition to activated carbon, the adsorbent may be any other material that has the function of adsorbing organic substances, such as anion exchange resins and amphoteric resins, and can be easily regenerated with an alkaline solution. For this purpose, a macroporous material is better than a material rich in micropores.
前記反応槽（８）で使用する凝集剤は、塩化第二鉄（Ｆ
ｅＣｌ 、）の他に硫酸ハンド（八／ ２（ＳＯ４）
３）も使用できる。The flocculant used in the reaction tank (8) is ferric chloride (F
In addition to eCl,), sulfuric acid hand (8/2 (SO4)
3) can also be used.
図面は本発明に係る廃水処理方法の概略フローを示す。
（１）・・・・・・生物処理槽、（２）・・・・・・限
外ろ過器、（７）・・・・・・脱臭塔。The drawing shows a schematic flow of the wastewater treatment method according to the present invention. (1)...Biological treatment tank, (2)...Ultrafilter, (7)...Deodorization tower.
Claims (1)
生物処理後の処理水を限外ろ過器（２）により固液分離
し、前記限外ろ過器（２）にてろ過した処理水に含まれ
るＣＯＤの原因となる成分及び色度の原因となる成分を
、アルカリ液によって再生可能な吸着剤への吸着によっ
て除去して浄化水を回収し、他方、アルカリ液でアルカ
リ域にｐＨ調整する脱臭塔（７）において、前記生物処
理槽（１）等から発生する酸性ガスをアルカリ次亜塩と
反応させて無臭化する廃水処理方法であって、アルカリ
液で前記吸着剤を再生して得た再生廃液から逆浸透膜に
よってアルカリ液を分離回収し、その回収したアルカリ
液を前記脱臭塔（７）でｐＨ調整するために有効利用す
る廃水処理方法。The wastewater is biologically treated with activated sludge in the biological treatment tank (1),
The treated water after biological treatment is separated into solid and liquid by an ultrafilter (2), and the components that cause COD and the chromaticity contained in the treated water filtered by the ultrafilter (2) are In the deodorizing tower (7), which collects purified water by removing components by adsorption onto a renewable adsorbent using an alkaline liquid, and on the other hand adjusts the pH to an alkaline range with an alkaline liquid, the biological treatment tank (1), etc. A wastewater treatment method in which acidic gas generated from a liquid is made odorless by reacting with an alkali hypochlorite, and the method comprises separating and recovering the alkaline liquid from the regenerated waste liquid obtained by regenerating the adsorbent with an alkaline liquid using a reverse osmosis membrane, A wastewater treatment method in which the recovered alkaline solution is effectively used to adjust the pH in the deodorizing tower (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032334A JPH01207199A (en) | 1988-02-15 | 1988-02-15 | Waste water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63032334A JPH01207199A (en) | 1988-02-15 | 1988-02-15 | Waste water treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01207199A true JPH01207199A (en) | 1989-08-21 |
Family
ID=12356053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63032334A Pending JPH01207199A (en) | 1988-02-15 | 1988-02-15 | Waste water treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01207199A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010172853A (en) * | 2009-01-30 | 2010-08-12 | Kurita Water Ind Ltd | Method for treating boron-containing water |
| CN106348540A (en) * | 2016-10-25 | 2017-01-25 | 天津市环境保护科学研究院 | Treatment method and device of high-salt-content nondegradable dye wastewater pit-pond |
-
1988
- 1988-02-15 JP JP63032334A patent/JPH01207199A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010172853A (en) * | 2009-01-30 | 2010-08-12 | Kurita Water Ind Ltd | Method for treating boron-containing water |
| CN106348540A (en) * | 2016-10-25 | 2017-01-25 | 天津市环境保护科学研究院 | Treatment method and device of high-salt-content nondegradable dye wastewater pit-pond |
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