JP2730513B2 - Treatment method for wastewater containing sulfoxides - Google Patents
Treatment method for wastewater containing sulfoxidesInfo
- Publication number
- JP2730513B2 JP2730513B2 JP6869895A JP6869895A JP2730513B2 JP 2730513 B2 JP2730513 B2 JP 2730513B2 JP 6869895 A JP6869895 A JP 6869895A JP 6869895 A JP6869895 A JP 6869895A JP 2730513 B2 JP2730513 B2 JP 2730513B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- tank
- sulfoxide
- electrolytic
- treatment
- 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.)
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Classifications
-
- 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
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Activated Sludge Processes (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はスルホキシド類有機硫黄
化合物を汚染物として含有する廃水の処理方法に関し、
特に生物化学的処理法を適用した場合にはスルフィド
類、メルカプタン類、硫化水素といった悪臭を有する硫
化物を発生させることなく、廃水を処理する方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating wastewater containing sulfoxides as organic pollutants.
In particular, the present invention relates to a method for treating wastewater without generating malodorous sulfides such as sulfides, mercaptans, and hydrogen sulfide when a biochemical treatment method is applied.
【０００２】[0002]
【従来の技術】現在ジメチルスルホキドは、国内で年間
約３０００トン生産され、主にアクリル繊維、医薬・農
薬などの合成、染料・顔料用溶剤、または剥離・洗浄剤
としての用途に使用されており、その工業的利用に伴い
大量のスルホキシド類含有廃水が生じている。従来、有
機物（ＣＯＤ、ＢＯＤ）を含有する廃水の処理において
は有機物の酸化処理が重要なプロセスであり、化学的酸
化処理法と生物化学的処理法に大別される。2. Description of the Related Art Currently, 3,000 tons of dimethyl sulfoxide is produced in Japan annually, and is mainly used for the synthesis of acrylic fiber, pharmaceuticals and agricultural chemicals, the solvent for dyes and pigments, or the use as a stripping / cleaning agent. As a result, a large amount of sulfoxide-containing wastewater is generated due to its industrial use. 2. Description of the Related Art Conventionally, in the treatment of wastewater containing organic substances (COD, BOD), oxidation processing of organic substances is an important process, and is roughly classified into a chemical oxidation treatment method and a biochemical treatment method.
【０００３】化学的な酸化処理法としては過マンガン酸
カリウム（ＫＭｎＯ４）、過酸化水素（Ｈ２Ｏ２）、塩
素（Ｃｌ２）、次亜塩素酸ナトリウム（ＮａＣｌＯ）等
の酸化剤処理やオゾン酸化処理、電解酸化処理法が採用
されており、スルホキシド類含有廃水に対してこれらの
酸化処理を行うことにより、ＣＯＤ値を完全に低下させ
ることが可能である。As a chemical oxidation treatment method, treatment with an oxidizing agent such as potassium permanganate (KMnO 4 ), hydrogen peroxide (H 2 O 2 ), chlorine (Cl 2 ), sodium hypochlorite (NaClO), or the like can be used. An ozone oxidation treatment and an electrolytic oxidation treatment method are employed, and by performing these oxidation treatments on sulfoxide-containing wastewater, it is possible to completely reduce the COD value.
【０００４】また、活性汚泥法を代表とした生物化学的
処理法は、微生物の働きにより有機物を分解する方法で
あり、溶解性有機物を凝集、吸着、分解、沈澱の機能を
果たし、都市下水、有機性廃水の処理技術として有力な
処理法である。スルホキシド類は活性汚泥法のような好
気条件では生分解されないため、嫌気条件での処理が採
用され、スルホキシド中の硫黄成分は分解途中でスルフ
ィド類、メルカプタン類、ジスルフィド類または硫化水
素等の代謝物を生成後、最終的に硫酸が生成し処理が完
了する。[0004] A biochemical treatment method typified by the activated sludge method is a method of decomposing organic substances by the action of microorganisms. This is an effective treatment method for treating organic wastewater. Sulfoxides are not biodegraded under aerobic conditions such as the activated sludge process, so treatment under anaerobic conditions is adopted, and the sulfur component in the sulfoxide is metabolized to sulfides, mercaptans, disulfides, hydrogen sulfide, etc. during decomposition. After the product is generated, sulfuric acid is finally generated and the process is completed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら上述した
従来の処理技術において、化学的に酸化処理する技術の
うち電解酸化処理法は、添加剤として少量の電解質のみ
で処理が可能で後工程への影響はほとんどないものの、
この技術をスルホキシド含有廃水に対して施した場合、
陽極での酸化反応と同時に陰極での還元反応が進行し、
悪臭物質であるスルフィド類が生成するという問題点が
あった。また、酸化反応もスルホン類が生成した時点で
完結し、それ以上の酸化分解反応は進行しない。However, among the above-mentioned conventional treatment techniques, among the techniques for chemically oxidizing treatment, the electrolytic oxidation treatment method can be carried out with only a small amount of electrolyte as an additive and affects the subsequent steps. Is rare,
When this technology is applied to sulfoxide-containing wastewater,
At the same time as the oxidation reaction at the anode, the reduction reaction at the cathode proceeds,
There was a problem that sulfides, which are malodorous substances, were generated. Further, the oxidation reaction is completed when the sulfones are generated, and no further oxidative decomposition reaction proceeds.
【０００６】一方、次亜塩素酸ナトリウムや過酸化水素
等の酸化剤かあるいはオゾン等による酸化処理を施した
場合、悪臭物質の発生はないが、電解酸化の場合と同様
スルホン類が最終生成物として生成し、それ以上の酸化
分解反応は進行しない。通常、有機物を含んだ廃水に対
して、有機物を完全に酸化分解した場合には、二酸化炭
素、水が最終的な生成物として得られ、また硫黄化合物
を含んだ有機物の場合にはさらに硫酸が生成するが、ス
ルホキシド含有廃水の場合、化学的な酸化処理ではスル
ホキシド含有廃水の無機化はなされていないため、ＣＯ
Ｄ値としては低下が見られるが、ＢＯＤ値を完全に低下
させるには至らなかった。On the other hand, when oxidizing treatment with an oxidizing agent such as sodium hypochlorite or hydrogen peroxide or ozone does not generate odorous substances, sulfones are converted to the final product as in the case of electrolytic oxidation. And no further oxidative decomposition reaction proceeds. Usually, when organic matter is completely oxidized and decomposed in wastewater containing organic matter, carbon dioxide and water are obtained as final products, and in the case of organic matter containing sulfur compounds, sulfuric acid is further added. However, in the case of sulfoxide-containing wastewater, the chemical oxidation treatment does not demineralize the sulfoxide-containing wastewater.
Although the D value was reduced, the BOD value was not completely reduced.
【０００７】一方、生物化学的処理法をスルホキシド類
の有機硫黄化合物を含んだ廃水に適用した場合には、活
性汚泥法のような好気条件ではスルホキシド類は生分解
されず、スルホキシド類は処理中に流出する。また嫌気
条件では比較的容易に分解が進行するが、嫌気条件下の
分解途中でスルフィド類、メルカプタン類、ジスルフィ
ド類または硫化水素等の代謝物を生成し、廃水から悪臭
物質が大気中に拡散し環境を悪化するといった問題があ
った。また活性汚泥法でも嫌気条件下で容易に分解する
ため、曝気槽で分解されなかったスルホキシド類がプロ
セス中の嫌気条件となる汚泥の沈澱槽等で分解し、悪臭
発生が問題となっていた。On the other hand, when a biochemical treatment method is applied to wastewater containing an organic sulfur compound of sulfoxides, sulfoxides are not biodegraded under aerobic conditions such as an activated sludge method, and sulfoxides are not treated. Spill into. Decomposition proceeds relatively easily under anaerobic conditions, but metabolites such as sulfides, mercaptans, disulfides or hydrogen sulfide are generated during decomposition under anaerobic conditions, and malodorous substances diffuse from the wastewater into the atmosphere. There was a problem of deteriorating the environment. In addition, even in the activated sludge method, since it is easily decomposed under anaerobic conditions, sulfoxides that have not been decomposed in an aeration tank are decomposed in a sludge sedimentation tank or the like which is subjected to anaerobic conditions during the process, and the generation of offensive odor has been a problem.
【０００８】[0008]
【課題を解決するための手段】上記課題を克服するため
のもので、本発明の第１の発明は、スルホキシド類有機
硫黄化合物を含有する有機廃水に対して、あらかじめス
ルホキシド類有機硫黄化合物中への酸素の付加によるス
ルホン類の合成反応を行った後、スルホン類をさらに生
物化学的処理により好気性条件下で分解し、処理するこ
とを特徴とする廃水の処理方法である。また第２の発明
は、第１の発明におけるスルホン類の合成反応におい
て、電解酸化法によりスルホン類の合成反応を行うこと
を特徴とする廃水の処理方法である。Means for Solving the Problems To overcome the above-mentioned problems, a first invention of the present invention is to convert organic wastewater containing an organic sulfur compound of a sulfoxide into an organic sulfur compound of a sulfoxide in advance. The method for treating wastewater is characterized in that after the synthesis reaction of sulfones by addition of oxygen, the sulfones are further decomposed and treated under aerobic conditions by biochemical treatment. A second invention is a method for treating wastewater, wherein the synthesis reaction of sulfones in the first invention is performed by an electrolytic oxidation method.
【０００９】また第３の発明は、第１の発明におけるス
ルホン類の合成反応において、電極間に隔膜を使用した
二槽、またはそれ以上の反応槽を有する多槽式電解槽の
陽極槽にスルホキシド類含有廃水、陰極槽に電解質溶液
をそれぞれ供給し電解酸化を行うことを特徴とする廃水
の処理方法である。また第４の発明は、第１の発明にお
けるスルホン類の合成反応において、陽イオン交換膜を
隔膜として使用した二槽、またはそれ以上の反応槽を有
する多槽式の電解槽の陽極槽に電解質として酸を加えた
スルホキシド類含有廃水、陰極槽に電解質溶液をそれぞ
れ供給し電解酸化を行うことを特徴とする廃水の処理方
法である。In a third aspect of the present invention, in the sulfone synthesis reaction according to the first aspect of the invention, the sulfoxide is added to the anode tank of a multi-chamber electrolytic cell having two or more reaction tanks using a diaphragm between electrodes. This is a method for treating wastewater, which comprises supplying an electrolyte solution to a wastewater containing substances and an electrolytic solution to a cathode tank, respectively, and performing electrolytic oxidation. According to a fourth aspect of the invention, in the synthesis reaction of sulfones according to the first aspect, the electrolyte is added to the anode tank of a multi-tank electrolytic tank having two or more reaction tanks using a cation exchange membrane as a membrane. A method for treating wastewater comprising supplying a sulfoxide-containing wastewater to which an acid is added, and an electrolytic solution by supplying an electrolyte solution to a cathode tank.
【００１０】[0010]
【作用】本発明ににおいては、化学的に酸化処理により
生成したスルホン類に対して生物化学的処理した場合に
は中間生成物としてスルフィン酸類（Ｒ−ＳＯ２Ｈ）、
スルホン酸類（Ｒ−ＳＯ３Ｈ）が生成し、硫酸が生成す
るもので、スルホキシド類に対しての生物化学的処理時
に発生するようなスルフィド類、メルカプタン類、また
は硫化水素など悪臭を有する生成物は発生せず処理が行
われる。生物処理時での悪臭物質の発生を防止し、Ｈ２
Ｏ、ＣＯ２、Ｈ２ＳＯ４までの分解処理ができるもので
ある。According to the present invention, sulfones (R-SO 2 H), as intermediate products, are obtained when biochemical treatment is applied to sulfones produced by a chemical oxidation treatment.
Sulfonic acids (R-SO 3 H) is generated, and generates sulfuric acid, sulfides, such as those generated during biochemical processing for sulfoxides, mercaptans, or products with a malodorous, such as hydrogen sulfide Does not occur and processing is performed. To prevent the occurrence of offensive odor substances at the time of biological treatment, H 2
It can decompose O, CO 2 and H 2 SO 4 .
【００１１】[0011]
【実施例】以下に本発明の実施例を図を用いて説明す
る。 ［実施例１］本発明の第１の実施例を図１で説明する。
図１は、スルホキシド類含有廃水に対して、酸化剤（次
亜塩素酸ナトリウム）による化学的酸化処理を施し、ス
ルホン類を生成させた後に好気的条件下で生物化学的処
理する、本発明の処理法を示すフローチャートである。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 A first embodiment of the present invention will be described with reference to FIG.
FIG. 1 shows the present invention in which a sulfoxide-containing wastewater is subjected to a chemical oxidation treatment with an oxidizing agent (sodium hypochlorite) to generate sulfones and then to undergo a biochemical treatment under aerobic conditions. 6 is a flowchart showing a processing method of the first embodiment.
【００１２】まず、ジメチルスルホキシド含有廃水（２
５００ｍｇ／ｌ、５００ｍｌ）のｐＨ値を約２に保ち、
酸化剤として次亜塩素酸ナトリウム水溶液（１０．５
％）を２５ｍｌ加え、酸化処理を行った。その結果、酸
化処理後のジメチルスルホキシドはすべてジメチルスル
ホンとなり、その濃度は２９００ｍｇ／ｌであった。First, dimethyl sulfoxide-containing wastewater (2
500 mg / l, 500 ml) at a pH of about 2,
Aqueous sodium hypochlorite solution (10.5
%) Was added to perform oxidation treatment. As a result, all of the dimethyl sulfoxide after the oxidation treatment was dimethyl sulfone, and the concentration was 2900 mg / l.
【００１３】続いて、生成したジメチルスルホン含有廃
水を３日置き、次亜塩素酸の濃度の１０ｍｇ／ｌまでの
低下を確認した後、水酸化ナトリウム水溶液で中和し
た。これを約１０倍に希釈し、ＮＨ４Ｃｌ ３００ｍｇ
／ｌ、Ｋ２ＨＰＯ４ １００ｍｇ／ｌ、ＭｇＳＯ４ ２
５ｍｇ／ｌ、ＫＣｌ ２５ｍｇ／ｌ、ＦｅＣｌ２ ０．
２ｍｇ／ｌ、酵母エキス ３０ｍｇ／ｌとなるように溶
解した。活性汚泥は予めジメチルスルホンに１ケ月馴養
し、馴養過程でメタンスルフィン酸およびメタンスルホ
ン酸、その後の硫黄イオン濃度の増加でジメチルスルホ
ンの好気条件下での分解能力を確認した。Subsequently, the generated dimethyl sulfone-containing wastewater was placed for 3 days, and after confirming that the concentration of hypochlorous acid had dropped to 10 mg / l, the solution was neutralized with an aqueous sodium hydroxide solution. This was diluted about 10-fold, and NH 4 Cl 300 mg
/ L, K 2 HPO 4 100 mg / l, MgSO 4 2
5 mg / l, KCl 25 mg / l, FeCl 2 .
It dissolved so that it might become 2 mg / l and yeast extract 30 mg / l. The activated sludge was previously acclimated to dimethyl sulfone for one month, and the degradation ability of dimethyl sulfone under aerobic conditions was confirmed by increasing the concentration of methanesulfinic acid and methanesulfonic acid during the acclimation process and then increasing the sulfur ion concentration.
【００１４】容量１Ｌの曝気槽を用意し、曝気槽にＭＬ
ＳＳが３０００ｍｇ／ｌとなるように添加し、温度２５
℃に保った。曝気槽は汚泥が十分撹拌されるよう、円塔
形状ものを使用し、曝気とともにスターラーで撹拌し
た。分解に伴いｐＨが低下するので、１Ｎの水酸化ナト
リウム水溶液でｐＨ７にコントロールした。滞留時間を
２０時間に設定し、５０ｍｌ／ｈｒで希釈したジメチル
スルホン含有廃水を曝気槽に流入した。沈殿槽を設けず
にフィルターセパレーターを使用して処理水を流出させ
た。２０時間後の流出水中のジメチルスルホンの濃度は
０ｍｇ／ｌであり、またメチルメルカプタンなどの悪臭
の発生は無かった。処理水のＴＯＣ濃度は２ｍｇ／ｌで
あった。An aeration tank having a capacity of 1 L is prepared, and ML is provided in the aeration tank.
SS was added so as to be 3000 mg / l.
C. The aeration tank used was a column-shaped one so that the sludge was sufficiently stirred, and was stirred with the stirrer together with the aeration. Since the pH was lowered with the decomposition, the pH was controlled at 7 with a 1N aqueous sodium hydroxide solution. The residence time was set at 20 hours, and the dimethyl sulfone-containing wastewater diluted at 50 ml / hr was flowed into the aeration tank. The treated water was discharged using a filter separator without providing a sedimentation tank. After 20 hours, the concentration of dimethyl sulfone in the effluent was 0 mg / l, and no malodor such as methyl mercaptan was generated. The TOC concentration of the treated water was 2 mg / l.
【００１５】［実施例２］次いで、本発明の実施例２を
図２、および図３を用いて説明する。図２は、スルホキ
シド類含有廃水に対して、電解酸化処理を施し、スルホ
ン類を生成させた後に生物化学的処理を行う、本発明の
処理法を示すフローチャートである。また、図３は電解
酸化処理に用いた電解槽の構造を示す断面図である。ま
ず、電解用隔膜として陽イオン交換膜（１）を使用した
二槽式の電解槽（２）の陽極室に電解質として硫酸（５
ｇ）を加えたジメチルスルホキシド含有廃水（３）（２
５００ｍｇ／ｌ、 ５００ｍｌ）を供給し、陰極室には
硫酸水溶液（４）（０．１ｍｌ／ｌ、 ５００ｍｌ）を
供給した。陽極（５）、陰極（６）ともに白金電極（５
０ｍｍ×５０ｍｍ）を用い、電極間距離１００ｍｍでセ
ットした後、直流電源（７）にて印可電圧４Ｖで５時間
電解酸化処理を行った。Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 2 is a flow chart showing a treatment method of the present invention in which a sulfoxide-containing wastewater is subjected to an electrolytic oxidation treatment to generate a sulfone, followed by a biochemical treatment. FIG. 3 is a sectional view showing the structure of the electrolytic cell used for the electrolytic oxidation treatment. First, sulfuric acid (5%) was used as an electrolyte in the anode chamber of a two-cell electrolytic cell (2) using a cation exchange membrane (1) as an electrolytic membrane.
g) to which dimethyl sulfoxide-containing wastewater (3) (2)
500 mg / l, 500 ml), and a sulfuric acid aqueous solution (4) (0.1 ml / l, 500 ml) was supplied to the cathode chamber. Both the anode (5) and the cathode (6) are platinum electrodes (5
(0 mm × 50 mm), and the electrode was set at a distance between the electrodes of 100 mm, and then subjected to electrolytic oxidation treatment with a DC power supply (7) at an applied voltage of 4 V for 5 hours.
【００１６】その結果、電解酸化処理後のジメチルスル
ホキシドはすべてジメチルスルホンとなり、その濃度は
３０００ｍｇ／ｌであった。続いて、得られたジメチル
スルホン含有廃水を水酸化ナトリウム水溶液で中和した
後、１０倍に希釈し、以下実施例１と同様の活性汚泥法
による生物化学的処理を行った。その結果、処理水のＴ
ＯＣは３ｍｇ／ｌとなり、ジメチルスルホンは検出され
ず、硫酸イオン濃度が３００ｍｇ／ｌ増加していた。本
実施例では、酸化剤を使用しないため、電解酸化処理に
より生成したジメチルスルホン含有廃水には次亜塩素酸
のような殺菌作用を有する物質は含まれず、生物処理へ
の悪影響や有機塩素化合物の生成などの問題を考慮する
必要がないという利点がある。As a result, the dimethyl sulfoxide after the electrolytic oxidation treatment was all dimethyl sulfone, and the concentration was 3000 mg / l. Subsequently, the obtained dimethyl sulfone-containing wastewater was neutralized with an aqueous sodium hydroxide solution, diluted 10-fold, and subjected to the same biochemical treatment as in Example 1 by the activated sludge method. As a result, the T
OC was 3 mg / l, dimethyl sulfone was not detected, and the sulfate ion concentration was increased by 300 mg / l. In the present embodiment, since no oxidizing agent is used, the dimethyl sulfone-containing wastewater generated by the electrolytic oxidation treatment does not contain a substance having a bactericidal action such as hypochlorous acid, and has an adverse effect on biological treatment and an organic chlorine compound. There is an advantage that it is not necessary to consider problems such as generation.
【００１７】[0017]
【比較例１】ジメチルスルホキシド廃水（２５００ｍｇ
／ｌ、 ５００ｍｌ）に対して酸化処理を行わず、１０
倍に希釈した後、実施例１と同様の活性汚泥法による生
物化学的処理を行った。処理水中のＴＯＣ濃度は７８ｍ
ｇ／ｌ、ジメチルスルホキシドは２４９ｍｇ／ｌであ
り、ジメチルスルホキシドはほとんど生分解していない
ことが確認された。Comparative Example 1 Dimethyl sulfoxide wastewater (2500 mg
/ L, 500 ml) without oxidation treatment.
After diluting by a factor of 2, biochemical treatment was performed by the same activated sludge method as in Example 1. TOC concentration in treated water is 78m
g / l, dimethylsulfoxide was 249 mg / l, and it was confirmed that dimethylsulfoxide was hardly biodegraded.
【００１８】[0018]
【比較例２】電解用隔膜を使用しない電解槽に電解質と
して硫酸（５ｇ）を加えたジメチルスルホキシド含有廃
水（２５００ｍｇ／ｌ、５００ｍｌ）を供給し、陽極、
陰極ともに白金電極（５０ｍｍ×５０ｍｍ）を用い、電
極間距離１００ｍｍでセットした後、印可電圧４Ｖにて
電解酸化処理を行った。その結果、電解酸化処理後まも
なく、ジメチルスルフィドが陰極での還元反応により生
成し、臭気が発生した。COMPARATIVE EXAMPLE 2 Dimethyl sulfoxide-containing wastewater (2500 mg / l, 500 ml) to which sulfuric acid (5 g) was added as an electrolyte was supplied to an electrolytic cell not using an electrolytic diaphragm, and an anode,
A platinum electrode (50 mm × 50 mm) was used for the cathode, and the electrode was set at a distance between the electrodes of 100 mm. Then, electrolytic oxidation was performed at an applied voltage of 4 V. As a result, shortly after the electrolytic oxidation treatment, dimethyl sulfide was generated by the reduction reaction at the cathode, and odor was generated.
【００１９】[0019]
【発明の効果】以上説明したように、本発明によれば、
スルホキシド類有機硫黄化合物を含有する廃水に対して
あらかじめ化学的な酸化処理を行いスルホン類を生成さ
せた後、さらに生物化学的処理法により再処理すること
により、生物処理時での悪臭物質の発生を防止し、Ｈ２
Ｏ、ＣＯ２、Ｈ２ＳＯ４までの分解処理が可能となる。
また、化学的な酸化処理に電解酸化法を適用する場合に
は電極間に隔膜を使用した多槽式の電解槽の陽極側にの
みスルホキシド類含有廃水を供給し、電解酸化処理を行
うことにより陰極でのスルホキシド類の還元反応を防止
し、酸化処理を行うことができるという効果を奏するも
のである。As described above, according to the present invention,
Sulfoxides Wastewater containing organic sulfur compounds is subjected to chemical oxidation in advance to generate sulfones, and then reprocessed by biochemical treatment to generate odorous substances during biological treatment To prevent H 2
Decomposition processing to O, CO 2 , H 2 SO 4 becomes possible.
In addition, when applying the electrolytic oxidation method to the chemical oxidation treatment, the sulfoxide-containing wastewater is supplied only to the anode side of a multi-tank type electrolytic cell using a diaphragm between the electrodes, and the electrolytic oxidation treatment is performed. This has the effect of preventing the reduction reaction of sulfoxides at the cathode and performing an oxidation treatment.
【図１】本発明の実施例１における酸化剤による化学的
酸化処理と生物学的処理を組み合わせた処理法を示すフ
ローチャートである。FIG. 1 is a flowchart showing a processing method in which a chemical oxidation treatment with an oxidizing agent and a biological treatment are combined in Embodiment 1 of the present invention.
【図２】本発明の実施例２における電解酸化処理と生物
学的処理を組み合わせた処理法を示すフローチャートで
ある。FIG. 2 is a flowchart showing a processing method in which electrolytic oxidation processing and biological processing are combined in Embodiment 2 of the present invention.
【図３】本発明の実施例２における電解酸化処理に用い
た電解槽の構造を示す断面図である。FIG. 3 is a cross-sectional view showing a structure of an electrolytic cell used for electrolytic oxidation treatment in Example 2 of the present invention.
１ 陽イオン交換膜 ２ 電解槽 ３ 硫酸添加スルホキシド含有廃水 ４ 硫酸水溶液 ５ 陽極 ６ 陰極 ７ 直流電源 DESCRIPTION OF SYMBOLS 1 Cation exchange membrane 2 Electrolysis tank 3 Sulfoxide added wastewater containing sulfuric acid 4 Sulfuric acid aqueous solution 5 Anode 6 Cathode 7 DC power supply
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/46 ＣＤＶ Ｃ０２Ｆ 1/46 ＣＤＶ ＺＡＢ ＺＡＢ 1/461 1/72 ＺＡＢＺ 1/72 ＺＡＢ 3/12 Ｎ 3/12 ＺＡＢＶ ＺＡＢ 1/46 １０１Ｃ ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 Identification code Agency reference number FI Technical display location C02F 1/46 CDV C02F 1/46 CDV ZAB ZAB 1/461 1/72 ZABZ 1/72 ZAB 3 / 12 N 3/12 ZABV ZAB 1/46 101C
Claims (4)
る有機廃水に対して、あらかじめスルホキシド類有機硫
黄化合物中への酸素の付加によるスルホン類の合成反応
を行った後、スルホン類をさらに生物化学的処理により
好気性条件下で分解し、処理することを特徴とする廃水
の処理方法。An organic wastewater containing an organic sulfur compound of a sulfoxide is subjected to a synthesis reaction of a sulfone by adding oxygen to the organic sulfur compound of a sulfoxide in advance, and the sulfone is further subjected to a biochemical treatment. A wastewater treatment method, wherein the wastewater is decomposed and treated under aerobic conditions.
化法によりスルホン類の合成反応を行うことを特徴とす
る請求項１記載の廃水の処理方法。2. The method for treating wastewater according to claim 1, wherein the synthesis reaction of the sulfones is carried out by an electrolytic oxidation method.
に隔膜を使用した二槽、またはそれ以上の反応槽を有す
る多槽式電解槽の陽極槽にスルホキシド類含有廃水、陰
極槽に電解質溶液をそれぞれ供給し電解酸化を行うこと
を特徴とする請求項１記載の廃水の処理方法。3. In a synthesis reaction of sulfones, sulfoxides-containing wastewater is placed in an anode tank of a multi-tank electrolytic tank having two or more reaction tanks using a diaphragm between electrodes, and an electrolyte solution is placed in a cathode tank. 2. The method for treating wastewater according to claim 1, wherein each of them is supplied and subjected to electrolytic oxidation.
ン交換膜を隔膜として使用した二槽、またはそれ以上の
反応槽を有する多槽式の電解槽の陽極槽に電解質として
酸を加えたスルホキシド類含有廃水、陰極槽に電解質溶
液をそれぞれ供給し電解酸化を行うことを特徴とする請
求項１記載の廃水の処理方法。4. A sulfoxide obtained by adding an acid as an electrolyte to an anode cell of a multi-cell electrolytic cell having two or more reaction tanks using a cation exchange membrane in a synthesis reaction of a sulfone compound. 2. The method for treating wastewater according to claim 1, wherein the electrolytic oxidation is performed by supplying the electrolyte solution to the contained wastewater and the cathode tank, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6869895A JP2730513B2 (en) | 1995-03-02 | 1995-03-02 | Treatment method for wastewater containing sulfoxides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6869895A JP2730513B2 (en) | 1995-03-02 | 1995-03-02 | Treatment method for wastewater containing sulfoxides |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08238497A JPH08238497A (en) | 1996-09-17 |
| JP2730513B2 true JP2730513B2 (en) | 1998-03-25 |
Family
ID=13381255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6869895A Expired - Fee Related JP2730513B2 (en) | 1995-03-02 | 1995-03-02 | Treatment method for wastewater containing sulfoxides |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730513B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117902689B (en) * | 2024-01-22 | 2024-07-12 | 浙江宏电环保装备有限公司 | Device and process for preparing MSM from DMSO wastewater |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5064165A (en) * | 1973-10-11 | 1975-05-31 |
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1995
- 1995-03-02 JP JP6869895A patent/JP2730513B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08238497A (en) | 1996-09-17 |
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