JPH0117432B2 - - Google Patents
Info
- Publication number
- JPH0117432B2 JPH0117432B2 JP58005822A JP582283A JPH0117432B2 JP H0117432 B2 JPH0117432 B2 JP H0117432B2 JP 58005822 A JP58005822 A JP 58005822A JP 582283 A JP582283 A JP 582283A JP H0117432 B2 JPH0117432 B2 JP H0117432B2
- Authority
- JP
- Japan
- Prior art keywords
- cod
- gas
- liquid contact
- containing wastewater
- malodorous
- 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.)
- Expired
Links
- 239000007788 liquid Substances 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- 239000002351 wastewater Substances 0.000 claims description 14
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 150000002505 iron Chemical class 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 238000011284 combination treatment Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 239000010800 human waste Substances 0.000 description 4
- 159000000014 iron salts Chemical class 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910019440 Mg(OH) Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- -1 alkalis Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【発明の詳細な説明】
本発明は、COD含有廃水と悪臭ガスの両者を
合理的に処理する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for rationally treating both COD-containing wastewater and malodorous gas.
し尿の生物処理水、各種産業廃水などCOD含
有廃水からCODを除去する方法として凝集沈殿、
活性炭吸着、化学酸化などがあるが、近年、化学
酸化法の一種としてフエントン酸化法が試みられ
る例がある。 Coagulation and precipitation are methods for removing COD from COD-containing wastewater, such as biologically treated human waste water and various industrial wastewaters.
There are activated carbon adsorption, chemical oxidation, etc., and in recent years, there has been an attempt to use the Fuenton oxidation method as a type of chemical oxidation method.
フエントン酸化法は、鉄塩（FeSO4、FeCl3な
ど）と過酸化水素によつてOHラジカルを発生さ
せてCOD成分を化学的に酸化分解する方法であ
る。 The Fenton oxidation method is a method of chemically oxidizing and decomposing COD components by generating OH radicals using iron salts (FeSO 4 , FeCl 3 , etc.) and hydrogen peroxide.
しかしながら、本発明者がフエントン法による
COD分解法を検討した結果、次のような大きな
問題点があることを知見した。 However, the present inventor uses the Fuenton method.
As a result of examining COD decomposition methods, we found that there were the following major problems.
すなわち
COD含有廃水にFeSO4とH2O2を添加してフ
エントン酸化反応を行つたあとの処理水にかな
りのH2O2が残留してしまい、この残留H2O2が
COD分析時にCOD成分として発現してしまう。 In other words, after FeSO 4 and H 2 O 2 are added to COD-containing wastewater and the Fenton oxidation reaction is performed, a considerable amount of H 2 O 2 remains in the treated water, and this residual H 2 O 2
It is expressed as a COD component during COD analysis.
従つて、残留H2O2を活性炭などと接触させ
て除去する工程が必要になる。 Therefore, a step is required to remove residual H 2 O 2 by bringing it into contact with activated carbon or the like.
COD含有廃水のCOD濃度の変動に応じて
H2O2添加量を厳密にコントロールするのが困
難であるため、しばしばH2O2の過剰注入を招
く。 Depending on changes in COD concentration in COD-containing wastewater
Difficulties in strictly controlling the amount of H 2 O 2 added often result in over-injection of H 2 O 2 .
本発明は、このような問題点を新規な発想によ
つて有効に解決するものであり、鉄塩と過酸化水
素を添加したCOD含有廃水を悪臭ガスと気液接
触することによつて、H2O2を悪臭ガスの酸化分
解にも利用しH2O2の残留を未然に防止するよう
にしたものである。 The present invention effectively solves these problems using a novel idea. By bringing COD-containing wastewater to which iron salts and hydrogen peroxide have been added into gas-liquid contact with foul-smelling gas, H 2 O 2 is also used for the oxidative decomposition of foul-smelling gases to prevent H 2 O 2 from remaining.
すなわち、本発明はCOD含有廃水に鉄塩と過
酸化水素を添加反応せしめてCOD成分を酸化分
解したのち、該廃水と悪臭ガスとを気液接触せし
めることを特徴とするCOD含有廃水と悪臭ガス
の合併処理方法である。 That is, the present invention is characterized in that the COD-containing wastewater and the malodorous gas are brought into gas-liquid contact after the COD-containing wastewater is reacted with iron salt and hydrogen peroxide to oxidize and decompose the COD components. This is the merger processing method.
次に、本発明の一実施態様を図面を参照しなが
ら説明する。 Next, one embodiment of the present invention will be described with reference to the drawings.
し尿の生物処理水などのCOD含有廃水１に硫
酸第１鉄（FeSO4）などの鉄塩２と過酸化水素３
を添加したのち、PH３〜４の条件でかくはんした
のち気液接触塔４に導入し悪臭ガス５と気液接触
させる。気液接触を終えた液６は循環ポンプ７に
よつて再び気液接触塔４に循環される。この過程
において、COD含有廃水１中のCOD成分はフエ
ントン反応によつて化学酸化され分解される（た
だし、すべてのCOD成分が酸化分解されるわけ
ではなく、フエントン反応によつても酸化分解さ
れないCOD成分は必然的に残留する）。一方、悪
臭ガス５中の悪臭成分（NH3、H2S、メルカプ
タンなど）はH2O2およびOHラジカルによつて
容易に酸化分解され、脱臭されたガス８が排出さ
れる。この気液接触は酸性条件下で行うのがよ
く、COD含有廃水は鉄塩と過酸化水素を添加さ
れて酸性側になつている。 COD-containing wastewater such as biologically treated human waste water (1), iron salts such as ferrous sulfate (FeSO 4 ), and hydrogen peroxide (3).
After adding , the mixture is stirred under the conditions of pH 3 to 4, and then introduced into a gas-liquid contact tower 4 to be brought into gas-liquid contact with the malodorous gas 5. The liquid 6 that has undergone gas-liquid contact is circulated again to the gas-liquid contact tower 4 by the circulation pump 7. In this process, the COD components in the COD-containing wastewater 1 are chemically oxidized and decomposed by the Fuenton reaction (however, not all COD components are oxidized and decomposed, and the COD components that are not oxidized and decomposed by the Fuenton reaction are components will inevitably remain). On the other hand, malodorous components (NH 3 , H 2 S, mercaptan, etc.) in malodorous gas 5 are easily oxidized and decomposed by H 2 O 2 and OH radicals, and deodorized gas 8 is discharged. This gas-liquid contact is preferably carried out under acidic conditions, and the COD-containing wastewater is made acidic by adding iron salts and hydrogen peroxide.
しかして、気液接触塔４から排出される液９は
Ca（OH）2、Mg（OH）2、NaOHなどのアルカリ剤
１０が添加され中和されFe3+イオンがFe（OH）3
として析出し、固液分離工程１１にて分離され
CODが減少した処理水１２が得られる。 Therefore, the liquid 9 discharged from the gas-liquid contact tower 4 is
Alkaline agents such as Ca(OH) 2 , Mg(OH) 2 and NaOH are added to neutralize Fe 3+ ions and convert them to Fe(OH) 3
It precipitates as
Treated water 12 with reduced COD is obtained.
以上のような本発明によれば、次のような重要
効果が得られる。 According to the present invention as described above, the following important effects can be obtained.
COD成分をフエントン酸化反応によつて除
去することを目的として添加したH2O2の一部
が残留するため、従来はH2O2分解剤（活性炭）
の添加を必要としたが、本発明ではH2O2残留
現象を悪臭ガスの脱臭に利用するので、H2O2
の残留を未然に防止でき、しかもH2O2分解剤
の添加を必要としない。 Because some of the H 2 O 2 added for the purpose of removing COD components through the Fuenton oxidation reaction remains, conventionally H 2 O 2 decomposers (activated carbon) were used.
However, in the present invention, since the residual phenomenon of H 2 O 2 is used to deodorize malodorous gas, H 2 O 2
can be prevented from remaining, and does not require the addition of a H 2 O 2 decomposer.
従来は悪臭ガスの脱臭用として別個に酸、ア
ルカリ又は塩素剤などの薬品を必要としたが、
本発明ではCOD除去工程から不可避的に残留
するH2O2を脱臭剤として利用するので、悪臭
ガスの脱臭経費が減少するという一石二鳥の効
果が得られる。 Previously, chemicals such as acids, alkalis, or chlorine agents were required separately to deodorize foul-smelling gases, but
In the present invention, since H 2 O 2 that inevitably remains from the COD removal process is used as a deodorizing agent, it is possible to achieve the effect of killing two birds with one stone by reducing the cost of deodorizing malodorous gas.
しかも、フエントン反応の最適PHが３前後の
酸性であることを利用して、アンモニアなどの
アルカリ性悪臭成分を極めて効果的に吸収除去
することができる。 Moreover, by utilizing the fact that the optimum pH of the Fuenton reaction is acidic, around 3, alkaline malodorous components such as ammonia can be absorbed and removed extremely effectively.
この結果、フエントン反応によるCOD除去
工程の後、Fe3+イオンをFe（OH）3として析出
させるための中和用のアルカリ剤の所要量が減
少できる（悪臭ガスから吸収されたアンモニア
がアルカリ剤として機能するためである。）。 As a result, after the COD removal process by the Fuenton reaction, the amount of alkali agent required for neutralization to precipitate Fe 3+ ions as Fe(OH) 3 can be reduced (ammonia absorbed from the malodorous gas is used as an alkaline agent). ).
実施例
某し尿処理場に搬入されるし尿を無希釈で生物
学的硝化脱窒素法によつて生物処理した処理水の
溶解性CODは450〜510mg／であつた。これに
FeSO42000mg／、H2O2500ppm添加した結果、
PHは3.1となつた。この状態で４時間撹拌しフエ
ントン反応を進行させた。Example Human waste brought into a certain human waste treatment plant was subjected to biological treatment without dilution using a biological nitrification and denitrification method, and the soluble COD of the treated water was 450 to 510 mg/. to this
As a result of adding FeSO 4 2000mg/, H 2 O 2 500ppm,
The pH was 3.1. The mixture was stirred in this state for 4 hours to allow the Fenton reaction to proceed.
しかるのち、充填塔（充填材はテラレツトを使
用）型の気液接触塔に導き、し尿の前処理工程
（し尿中の 雑物を除去する工程）から発生する
悪臭空気（NH3、H2Sを主成分とするもの）と
液ガス比（Ｌ／Ｇ）1.0で気液接触させた。この
結果、気液接触塔入口の悪臭空気の臭気濃度平均
50000が、気液接触塔出口で臭気濃度1000以下と
なつた。 After that, it is introduced into a gas-liquid contact tower of the packed tower type (Teraretsu is used as the packing material) to remove the foul-smelling air (NH 3 , H 2 S (main component)) was brought into gas-liquid contact at a liquid-gas ratio (L/G) of 1.0. As a result, the average odor concentration of the foul-smelling air at the inlet of the gas-liquid contact tower
50,000, but the odor concentration became less than 1,000 at the outlet of the gas-liquid contact tower.
一方、気液接触塔から流出する液にMg（OH）2
を添加しPH5.0に中和し、析出するFe（OH）3沈殿
を分離した上澄水のCODは70〜82mg／であつ
た。また、残留H2O2濃度を塩化チタンによる比
色法で測定した結果1ppm以下であつた。 On the other hand, Mg(OH) 2 is present in the liquid flowing out from the gas-liquid contact tower.
was added to neutralize the pH to 5.0, and the precipitated Fe(OH) 3 precipitate was separated, and the COD of the supernatant water was 70 to 82 mg/. Further, the residual H 2 O 2 concentration was measured by a colorimetric method using titanium chloride and was found to be 1 ppm or less.
図面は、本発明の一実施態様を示すフローシー
トである。
１……COD含有廃水、２……鉄塩、３……過
酸化水素、４……気液接触塔、５……悪臭ガス、
６，９……液、７……循環ポンプ、８……ガス、
１０……アルカリ剤、１１……固液分離工程、１
２……処理水。
The drawing is a flow sheet illustrating one embodiment of the invention. 1... COD-containing wastewater, 2... Iron salt, 3... Hydrogen peroxide, 4... Gas-liquid contact tower, 5... Malodorous gas,
6, 9...Liquid, 7...Circulation pump, 8...Gas,
10...Alkaline agent, 11...Solid-liquid separation step, 1
2... Treated water.
Claims (1)
応せしめてCOD成分を酸化分解したのち、該廃
水と悪臭ガスとを気液接触せしめることを特徴と
するCOD含有廃水と悪臭ガスの合併処理方法。 ２ 前記気液接触処理を酸性条件下で行う特許請
求の範囲第１項記載の方法。[Claims] 1 A COD-containing wastewater characterized by adding an iron salt and hydrogen peroxide to the COD-containing wastewater to oxidize and decompose the COD component, and then bringing the wastewater and a malodorous gas into gas-liquid contact. Combination treatment method for malodorous gas. 2. The method according to claim 1, wherein the gas-liquid contact treatment is performed under acidic conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58005822A JPS59132995A (en) | 1983-01-19 | 1983-01-19 | Combined treatment of cod-contg. waste water and stenchy gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58005822A JPS59132995A (en) | 1983-01-19 | 1983-01-19 | Combined treatment of cod-contg. waste water and stenchy gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59132995A JPS59132995A (en) | 1984-07-31 |
| JPH0117432B2 true JPH0117432B2 (en) | 1989-03-30 |
Family
ID=11621762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58005822A Granted JPS59132995A (en) | 1983-01-19 | 1983-01-19 | Combined treatment of cod-contg. waste water and stenchy gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59132995A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2754808B1 (en) * | 1996-10-23 | 1998-12-04 | Atochem Elf Sa | PROCESS FOR THE MANUFACTURE OF SUPERPHOSPHATES WITHOUT EMISSION OF PUNISH OR ORGANIC ODORS |
| CN105498495A (en) * | 2015-12-31 | 2016-04-20 | 中山大学 | Device for treating waste gas by Fenton oxidation |
| CN108273384A (en) * | 2018-03-02 | 2018-07-13 | 深圳市中润恒泰环境科技有限公司 | A kind of deodorizing method and device for administering indoles scatol pyridines stench |
-
1983
- 1983-01-19 JP JP58005822A patent/JPS59132995A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59132995A (en) | 1984-07-31 |
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