JPH04247284A - Treatment of ammonia liquor - Google Patents
Treatment of ammonia liquorInfo
- Publication number
- JPH04247284A JPH04247284A JP3012072A JP1207291A JPH04247284A JP H04247284 A JPH04247284 A JP H04247284A JP 3012072 A JP3012072 A JP 3012072A JP 1207291 A JP1207291 A JP 1207291A JP H04247284 A JPH04247284 A JP H04247284A
- Authority
- JP
- Japan
- Prior art keywords
- water
- activated carbon
- ammonia liquor
- oxidation
- ammonium
- 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
- 235000011114 ammonium hydroxide Nutrition 0.000 title abstract 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000001179 sorption measurement Methods 0.000 claims abstract description 12
- 239000000571 coke Substances 0.000 claims abstract description 9
- 238000005273 aeration Methods 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000003245 coal Substances 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 37
- 230000033116 oxidation-reduction process Effects 0.000 claims description 9
- 238000010000 carbonizing Methods 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 5
- 230000015271 coagulation Effects 0.000 claims description 3
- 238000005345 coagulation Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 241000894006 Bacteria Species 0.000 abstract description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract 3
- 230000003647 oxidation Effects 0.000 abstract 2
- 238000007254 oxidation reaction Methods 0.000 abstract 2
- 238000003763 carbonization Methods 0.000 abstract 1
- 230000016615 flocculation Effects 0.000 abstract 1
- 238000005189 flocculation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910021529 ammonia Inorganic materials 0.000 description 5
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 5
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 5
- 235000011130 ammonium sulphate Nutrition 0.000 description 5
- 235000010344 sodium nitrate Nutrition 0.000 description 5
- 239000004317 sodium nitrate Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- -1 nitrate ions Chemical class 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
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
- Water Treatment By Sorption (AREA)
- Activated Sludge Processes (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、石炭を乾留してコー
クスを製造するときに発生する安水処理方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a method for treating ammonium water generated when coke is produced by carbonizing coal.
【０００２】0002
【従来の技術】石炭をコークス炉で乾留してコークスを
製造する際には、副産物としてコークス炉ガス、軽油お
よびタール等が発生する外に、安水が発生する。この安
水は、タールと混合された状態で発生するので、タール
と安水の混合液をタールデカンタに受け、この混合液を
静置することにより、タールを沈澱させ、タールと安水
に分離するようにしている。2. Description of the Related Art When coke is produced by carbonizing coal in a coke oven, not only coke oven gas, light oil, tar, etc. are produced as by-products, but also ammonium water is produced. This ammonium water is generated mixed with tar, so by receiving the mixture of tar and ammonium water in a tar decanter and allowing this mixture to stand, the tar is precipitated and separated into tar and ammonium water. I try to do that.
【０００３】上述した安水中には、アンモニアをはじめ
とする不純物が含まれており、そのまま放流すると公害
を引き起こすことになるので、これらの不純物を安水中
から除去するための水処理が行われている。[0003] The above-mentioned ammonium water contains impurities such as ammonia, and if released as is, it will cause pollution, so water treatment is carried out to remove these impurities from the ammonium water. There is.
【０００４】図２は、安水処理の１例を示す工程図であ
る。タールデカンタでタールと分離された安水は、安水
タンク２１に貯蔵される。そして、ポンプ２２により安
水ストリッパー２３に送られ、処理水中からアンモニア
が分離され、分離されたアンモニアはコークス炉ガス管
に送られる。アンモニアが分離された処理水は、ｐＨ調
整槽２４に送られ、ここで硫酸が添加されて中和される
。ｐＨを調整された処理水は、ポンプ２５により原水タ
ンク２６に蓄えられる。そして、原水タンク２６に蓄え
られた処理水は、ポンプ２７により曝気槽２８に送られ
、ここで処理水中のフェノール、アンモニア等の不純物
は、好気性バクテリアにより食べられる。そして、増殖
したバクテリアは、処理水の表面に浮いているので、沈
澱槽２９で沈澱させるとともに、処理水を凝集沈澱槽３
０に送って、凝集剤を加えてバクテリアを凝集沈澱させ
るようにしている。さらに、ポンプ３１により処理水を
ろ過器３２に送ってろ過し、活性炭吸着塔３３で処理水
中の着色成分を吸着させ、処理水を無色かつ無害な状態
にして、放流する。FIG. 2 is a process diagram showing one example of ammonium water treatment. Ammonium water separated from tar in the tar decanter is stored in an ammonium water tank 21. Then, the water is sent to the ammonium water stripper 23 by the pump 22, where ammonia is separated from the treated water, and the separated ammonia is sent to the coke oven gas pipe. The treated water from which ammonia has been separated is sent to the pH adjustment tank 24, where sulfuric acid is added to neutralize it. The pH-adjusted treated water is stored in a raw water tank 26 by a pump 25. The treated water stored in the raw water tank 26 is sent to the aeration tank 28 by a pump 27, where impurities such as phenol and ammonia in the treated water are eaten by aerobic bacteria. Since the bacteria that have proliferated are floating on the surface of the treated water, they are precipitated in the sedimentation tank 29 and the treated water is coagulated and sedimented in the sedimentation tank 3.
0, and a flocculant is added to flocculate and precipitate the bacteria. Further, the pump 31 sends the treated water to the filter 32 for filtration, and the activated carbon adsorption tower 33 adsorbs colored components in the treated water, making the treated water colorless and harmless, and then discharging it.
【０００５】上述した安水処理工程を利用して、硫安製
造プラントで発生した凝縮水を処理することがある。硫
安の製造は、硫安母液（硫安３０％、残り水）中の水分
を蒸発させて、硫安の結晶を得るという方法で行われる
が、蒸発した水分は再び凝縮させ、水分中の有害成分を
水処理を行うことにより除去した後、放流するようにし
ている。そして、これ自体を単独で水処理するには、処
理費用がかかりすぎるので、上記したように安水処理工
程を利用して処理するのである。[0005] The above-mentioned ammonium water treatment process is sometimes used to treat condensed water generated in an ammonium sulfate manufacturing plant. Ammonium sulfate is produced by evaporating the water in the ammonium sulfate mother liquor (30% ammonium sulfate, remaining water) to obtain ammonium sulfate crystals. After removing it through treatment, it is released into the water. Since it would be too expensive to treat this substance alone with water, it is treated using the ammonium water treatment process as described above.
【０００６】ところで、この凝縮水の中には、硫黄分や
ＳＯ４２−が含まれるが、これらの成分の影響にり活性
炭吸着塔の活性炭内に硫酸還元菌が発生する。そして、
このためＨ２Ｓガスが発生し、処理水が白濁して透視度
が悪くなり、そのままでは処理水を放流できなくなる。
そのため、従来はＨ２Ｓガスが発生すると、その発生量
に対比させて処理水中に硝酸ソーダ（ＮａＮＯ３）を添
加して、Ｈ２Ｓガスの発生を抑制するようにしている。By the way, this condensed water contains sulfur and SO42-, and due to the influence of these components, sulfate-reducing bacteria are generated within the activated carbon of the activated carbon adsorption tower. and,
As a result, H2S gas is generated, and the treated water becomes cloudy and its visibility deteriorates, making it impossible to discharge the treated water as it is. Therefore, conventionally, when H2S gas is generated, sodium nitrate (NaNO3) is added to the treated water in proportion to the amount of H2S gas generated to suppress the generation of H2S gas.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、上述し
た硝酸ソーダを添加して、Ｈ２Ｓガスの発生を抑制する
方法には、次のような問題点があった。
（１）Ｈ２Ｓガスの発生が予知できず、Ｈ２Ｓガス発生
後に硝酸ソーダを添加するので、対応が遅れる。
（２）使用する硝酸ソーダの費用が莫大となる。[Problems to be Solved by the Invention] However, the above-mentioned method of adding sodium nitrate to suppress the generation of H2S gas has the following problems. (1) Since the generation of H2S gas cannot be predicted and sodium nitrate is added after H2S gas is generated, the response is delayed. (2) The cost of the sodium nitrate used becomes enormous.
【０００８】この発明は、従来技術の上記のような問題
点を解消し、活性炭吸着塔の活性炭内で硫酸還元菌が発
生しない、安水の水処理方法を提供することを目的とし
ている。The object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method for treating ammonium water in which sulfate-reducing bacteria are not generated in the activated carbon of an activated carbon adsorption tower.
【０００９】[0009]
【課題を解決するための手段】この発明に係る安水処理
方法は、石炭を乾留してコークスを製造するときに発生
する安水を、曝気槽、凝集沈澱槽、ろ過槽および活性炭
吸着塔を通して不純物を除去し、規制値以下にしてから
放流する安水の水処理方法において、最終活性炭処理工
程における処理水中の酸化還元電位を測定し、この酸化
還元電位が４０ｍＶ以上になるように、活性炭処理前に
吹き込む空気量を調整する安水処理方法である。[Means for Solving the Problems] The ammonium water treatment method according to the present invention passes ammonium water generated when coke is produced by carbonizing coal through an aeration tank, a coagulation sedimentation tank, a filter tank, and an activated carbon adsorption tower. In the water treatment method of ammonium water, which removes impurities and brings the temperature below the regulatory value before discharging it, the redox potential of the treated water in the final activated carbon treatment step is measured, and the activated carbon treatment is performed so that the redox potential is 40 mV or higher. This is a low water treatment method that adjusts the amount of air that is blown in beforehand.
【００１０】0010
【作用】この発明に係る安水処理方法は、石炭を乾留し
てコークスを製造するときに発生する安水を、曝気槽、
凝集沈澱槽、ろ過槽および活性炭吸着塔を通して不純物
を除去し、規制値以下にしてから放流する安水処理方法
において、最終活性炭処理工程における処理水中の酸化
還元電位を測定し、この酸化還元電位が４０ｍＶ以上に
なるように、活性炭処理前に吹き込む空気量を調整する
ようにしている。[Function] The ammonium water treatment method according to the present invention is characterized in that the ammonium water generated when coke is produced by carbonizing coal is treated in an aeration tank,
In the ammonium water treatment method, in which impurities are removed through a coagulation sedimentation tank, a filter tank, and an activated carbon adsorption tower, and the water is discharged after being brought to below a regulatory value, the oxidation-reduction potential of the treated water in the final activated carbon treatment step is measured, and this oxidation-reduction potential is The amount of air blown before activated carbon treatment is adjusted so that the voltage is 40 mV or higher.
【００１１】上記のようにしているのは、次の理由によ
るものである。硫酸還元菌が発生していることから、活
性炭内は還元雰囲気と思われるので、活性炭吸着塔で発
生するＨ２Ｓガス濃度（ｐｐｍ）と、処理水の酸化還元
電位（ｍＶ）との関係を調査したところ、図３のグラフ
に示すような関係にあることが分かった。酸化還元電位
がマイナス側、すなわち還元側にあるときには、Ｈ２Ｓ
ガス濃度が高くなり、その濃度は酸化還元電位がマイナ
スになればなるほど高くなる。そして、酸化還元電位が
４０ｍＶ以上であれば、Ｈ２Ｓガスの発生が抑えられる
ということが分かった。当然酸化還元電位が４０ｍＶか
ら高くなればなるほど、Ｈ２Ｓガスの発生は限り無く０
に近づいていくが、実用的には２００ｍＶ程度以下であ
ればよい。The reason for doing so is as follows. Since sulfate-reducing bacteria are present, it seems that there is a reducing atmosphere inside the activated carbon, so we investigated the relationship between the H2S gas concentration (ppm) generated in the activated carbon adsorption tower and the redox potential (mV) of the treated water. However, it was found that there was a relationship as shown in the graph of FIG. When the redox potential is on the negative side, that is, on the reduction side, H2S
The gas concentration increases, and the more negative the redox potential becomes, the higher the concentration becomes. It was also found that when the oxidation-reduction potential is 40 mV or more, the generation of H2S gas can be suppressed. Naturally, the higher the redox potential is from 40 mV, the less H2S gas will be generated.
However, for practical purposes, it is sufficient that it is about 200 mV or less.
【００１２】次に、酸化還元電位と、活性炭処理前での
処理水中に含まれる溶存酸素濃度（ｐｐｍ）との関係を
調査した。これは、処理水中に含まれる溶存酸素濃度が
高まれば、処理水が好気性の雰囲気になり、硝酸イオン
の発生が活発となって、これが活性炭吸着塔でのＨ２Ｓ
ガスの発生を抑え、したがって酸化還元電位が高まると
考えられるからである。調査の結果、酸化還元電位と、
曝気槽での処理水中に含まれる溶存酸素濃度との関係は
、図４のグラフに示す関係となり、溶存酸素濃度を高め
れば、ひいては酸素の吹き込み量を多くすれば、酸化還
元電位を高めることができ、したがって活性炭吸着塔で
のＨ２Ｓガスの発生が抑えられることが分かった。Next, the relationship between the oxidation-reduction potential and the dissolved oxygen concentration (ppm) contained in the treated water before the activated carbon treatment was investigated. This is because when the dissolved oxygen concentration in the treated water increases, the treated water becomes an aerobic atmosphere, and the generation of nitrate ions becomes active, which causes H2S in the activated carbon adsorption tower.
This is because it is believed that gas generation is suppressed and therefore the redox potential is increased. As a result of the investigation, the redox potential and
The relationship between the concentration of dissolved oxygen contained in the water treated in the aeration tank is as shown in the graph in Figure 4, and the redox potential can be increased by increasing the dissolved oxygen concentration and by increasing the amount of oxygen blown into the water. It was found that the generation of H2S gas in the activated carbon adsorption tower was suppressed.
【００１３】本発明に係る安水処理方法は、上述のよう
な理由により、最終活性炭処理工程における処理水中の
酸化還元電位を測定し、この酸化還元電位が４０ｍＶ以
上になるように、曝気槽に吹き込む空気量を調整するよ
うにしたのである。[0013] For the reasons mentioned above, the ammonium water treatment method according to the present invention measures the oxidation-reduction potential of the treated water in the final activated carbon treatment step, and injects water into the aeration tank so that the oxidation-reduction potential becomes 40 mV or more. The amount of air blown was adjusted.
【００１４】[0014]
【実施例】本発明の１実施例の安水処理方法を実施した
結果を、図１に示す。図１（ａ）は、本発明の１実施例
の安水処理方法を１００日以上にわたって実施したとき
の溶存酸素濃度（ｐｐｍ）の推移、図１（ｂ）はＨ２Ｓ
ガスの発生量（ｐｐｍ）の推移を示すグラフである。図
１から明らかなように、酸化還元電位を４０ｍＶ以上に
保つように、溶存酸素濃度、すなわち空気の吹き込み量
を調整することにより、Ｈ２Ｓガスの発生が抑えられて
いることが分かる。[Example] Figure 1 shows the results of carrying out the ammonium water treatment method according to one example of the present invention. Figure 1(a) shows the change in dissolved oxygen concentration (ppm) when the ammonium water treatment method of one embodiment of the present invention was carried out for over 100 days, and Figure 1(b) shows the H2S
It is a graph showing changes in the amount of gas generated (ppm). As is clear from FIG. 1, the generation of H2S gas is suppressed by adjusting the dissolved oxygen concentration, that is, the amount of air blown so as to maintain the redox potential at 40 mV or higher.
【００１５】[0015]
【発明の効果】この発明により、活性炭吸着塔でのＨ２
Ｓガスの発生が抑えられる。Effect of the invention: According to this invention, H2 in an activated carbon adsorption tower can be reduced.
Generation of S gas is suppressed.
【図１】本発明の１実施例の安水の水処理方法を１００
日以上にわたって実施したときの溶存酸素濃度およびＨ
２Ｓガスの発生量の推移を示すグラフである。FIG. 1 shows a method for treating ammonium water according to one embodiment of the present invention.
Dissolved oxygen concentration and H
It is a graph showing changes in the amount of 2S gas generated.
【図２】安水処理工程を示す工程図である。FIG. 2 is a process diagram showing an ammonium water treatment process.
【図３】Ｈ２Ｓガスの発生量と酸化還元電位との関係を
示すグラフである。FIG. 3 is a graph showing the relationship between the amount of H2S gas generated and the oxidation-reduction potential.
【図４】酸化還元電位と溶存酸素濃度との関係を示すグ
ラフである。FIG. 4 is a graph showing the relationship between redox potential and dissolved oxygen concentration.
Claims (1)
きに発生する安水を、曝気槽、凝集沈澱槽、ろ過槽およ
び活性炭吸着塔を通して不純物を除去し、規制値以下に
してから放流する安水処理方法において、最終活性炭処
理工程における処理水中の酸化還元電位を測定し、この
酸化還元電位が４０ｍＶ以上になるように、活性炭処理
前に吹き込む空気量を調整することを特徴とする安水処
理方法。Claim 1: An ammonium water produced when producing coke by carbonizing coal is passed through an aeration tank, a coagulation sedimentation tank, a filter tank, and an activated carbon adsorption tower to remove impurities and bring it below regulatory values before discharging it. In the water treatment method, the ammonium water treatment is characterized by measuring the oxidation-reduction potential in the treated water in the final activated carbon treatment step, and adjusting the amount of air blown in before the activated carbon treatment so that the oxidation-reduction potential becomes 40 mV or more. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3012072A JPH04247284A (en) | 1991-02-01 | 1991-02-01 | Treatment of ammonia liquor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3012072A JPH04247284A (en) | 1991-02-01 | 1991-02-01 | Treatment of ammonia liquor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04247284A true JPH04247284A (en) | 1992-09-03 |
Family
ID=11795394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3012072A Pending JPH04247284A (en) | 1991-02-01 | 1991-02-01 | Treatment of ammonia liquor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04247284A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0819780A (en) * | 1994-07-07 | 1996-01-23 | Mikasa:Kk | Water redox potential control device |
| CN102358656A (en) * | 2011-09-14 | 2012-02-22 | 黑龙江建龙钢铁有限公司 | Residual ammonia water degreasing method |
| JP2014130064A (en) * | 2012-12-28 | 2014-07-10 | Toshiba Corp | Washing waste liquid processing device and washing waste liquid processing method |
| CN104496102A (en) * | 2014-12-15 | 2015-04-08 | 刘刚 | Reusing treatment method and reusing treatment system for residual coking ammonia water |
| CN108658291A (en) * | 2018-05-22 | 2018-10-16 | 重庆欣欣向荣精细化工有限公司 | A method of it reducing o-ethoxyphenol and produces Determination of Volatile Phenol in Refinery Wastewater content |
-
1991
- 1991-02-01 JP JP3012072A patent/JPH04247284A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0819780A (en) * | 1994-07-07 | 1996-01-23 | Mikasa:Kk | Water redox potential control device |
| CN102358656A (en) * | 2011-09-14 | 2012-02-22 | 黑龙江建龙钢铁有限公司 | Residual ammonia water degreasing method |
| JP2014130064A (en) * | 2012-12-28 | 2014-07-10 | Toshiba Corp | Washing waste liquid processing device and washing waste liquid processing method |
| CN104496102A (en) * | 2014-12-15 | 2015-04-08 | 刘刚 | Reusing treatment method and reusing treatment system for residual coking ammonia water |
| CN108658291A (en) * | 2018-05-22 | 2018-10-16 | 重庆欣欣向荣精细化工有限公司 | A method of it reducing o-ethoxyphenol and produces Determination of Volatile Phenol in Refinery Wastewater content |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6546581B2 (en) | Process for the biological removal of nitrogen from wastewater | |
| JP3445901B2 (en) | Method and apparatus for treating selenium-containing wastewater | |
| US20130112617A1 (en) | Redox wastewater biological nutrient removal treatment method | |
| CN105084589A (en) | Treatment method and system for wet magnesium desulphurization wastewater | |
| US5647996A (en) | Groundwater total cyanide treatment method | |
| JPH04247284A (en) | Treatment of ammonia liquor | |
| CN108726669A (en) | A kind of method that magnetic activated sludge process synchronizes a variety of non-steroidal estrogenics of removal | |
| JP2004033897A (en) | Flocculation method of excretion-containing wastewater, flocculation equipment therefor, composting system equipped therewith | |
| CN111995181A (en) | Treatment method of photovoltaic industrial wastewater | |
| JP2007196172A (en) | Liquid extract of humic substance, solidifying agent, concentrating agent and method for treating organic waste water by using them | |
| CN104860455A (en) | Methylene dithiocyanate wastewater treatment method | |
| JPH04235796A (en) | Treatment of ammoniacal liquor | |
| JPS6320600B2 (en) | ||
| DE2848710A1 (en) | METHOD FOR WASTEWATER CLEANING | |
| JP4051183B2 (en) | Water quality control equipment for sewage treatment plants | |
| JPH04334593A (en) | Advanced water treatment system and method for starting up the same | |
| JPS62289299A (en) | Treatment of phosphorus-containing waste liquid | |
| CN103214073B (en) | Coagulant adding method of A/O biological decarbonization and denitrification technology | |
| KR101367904B1 (en) | Method for Removing Phosphate from Waste water by Recycling Unreacted Coagulant in the third treatment sludge into a Previous Process | |
| SU1346587A1 (en) | Method of biological purification of waste water from phosphorus and nitrogen | |
| JPH11128982A (en) | Treatment of selenium-containing waste water | |
| Sabirova et al. | Final purification of biochemically treated coke-plant wastewater | |
| JPS62193697A (en) | Treatment of heavy metal-containing waste water by sulfuric acid reducing bacteria | |
| JPH0232036B2 (en) | ||
| CN117105474A (en) | Oxidation treatment process of desulfurization wastewater three-header device |