CN105036459B - Treatment process for phenol-cyanogen wastewater - Google Patents
Treatment process for phenol-cyanogen wastewater Download PDFInfo
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- CN105036459B CN105036459B CN201510355955.3A CN201510355955A CN105036459B CN 105036459 B CN105036459 B CN 105036459B CN 201510355955 A CN201510355955 A CN 201510355955A CN 105036459 B CN105036459 B CN 105036459B
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Abstract
The invention relates to a treatment process for phenol-cyanogen wastewater. According to the treatment method, pretreatment of a biochemical reaction tank is enhanced, and cyanogen and a greater part of organic matters are removed through a chemical method; through double-film treatment, wastewater without cyanogen and the greater part of organic matters is divided into a clear liquid and a concentrated liquor, the clear liquid does not contain impurities such as organic matters basically, and can be used as production water for other workshops; the concentrated liquor is subjected to biochemical treatment continuously, part of water from a biochemical pool is used for coke quenching; the other part of water from the biochemical pool is treated further, so that the water can reach the standards to be discharged. The treatment process has the advantages that the wastewater treatment cost is low, the operation and maintenance are simple, and the discharged treated water cannot cause pollution any more.
Description
Technical field
The invention belongs to technical field of sewage, is related to a kind of handling process of phenol-cyanogen sewage.
Background technology
Metallurgical industry coke-oven plant mainly provides coke and coal gas to factories such as ironmaking, steel-making, steel rolling, while reclaiming
Various industrial chemicals such as tar, benzene, phenol.Coke-stove gas in de- naphthalene, desulfurization, except ammonia, eventually in cold and de- benzene purification process, each operation
Some are produced containing phenol, cyanogen, the sewage of ammonia nitrogen --- phenol-cyanogen sewage.Phenol-cyanogen sewage mainly includes coking production sewage, ammonia still process
The supporting desalted water station sewer of sewage, coke dry quenching boiler, water in water circulating system with water and sanitary sewage and early-stage rainwater etc., its
In, containing the noxious substance such as substantial amounts of phenol, cyanogen in coking production sewage and ammonia still process sewage, and the pollutant such as ammonia nitrogen, tar, such as
Without processing just, directly discharge can cause significant damage to environment.
Most domestic coke-oven plant phenol-cyanogen sewage is processed and adopts biochemical treatment process, and biochemical treatment process is at original dephenolize
A kind of processing method for developing in science and engineering skill and coming, in original single handling process pretreatment unit is increased, and is provided with and is removed
Oil sump, floation tank etc., remove light, tar heavy oil and oil emulsion；Increase regulating reservoir, tentatively water quality is adjusted；Improve aeration work
Skill, wastewater containing phenol and cyanide enters back into Aeration tank Jing after preaeration and carries out aeration, and the waste water and returned sludge after process is again returned to
Aeration tank carries out advanced treating.
Although biochemical process can effectively reduce the pollutant such as Phenol for Waste Water, cyanogen, oil, to CODCr, ammonia nitrogen process
But preferable effect can not be reached.
In order to effectively remove the COD in waste waterCr, ammonia nitrogen, make effluent quality meet discharging standards requirement, biological denitrificaion
Technology is occurred in wastewater containing phenol and cyanide handling process as a kind of new and effective technology, and biological denitrificaion is nitrification and denitrification reaction
Application, nitrification and denitrification reaction be the organic ingredient of biological denitrificaion 2.Biological denitrificaion includes aerobic and two sections of anoxia
Biochemical process, that is, nitrification and denitrification reaction bonded is got up, the nitrification and denitrification for completing ammonia nitrogen separates out nitrogen
Process.By anoxia and the processing method of aerobic combination, it not only makes the NH after process in water3- N and NOX- N concentration is down to most
The little, Organic substance degraded in water, the Organic substance of part difficult degradation is able to open chain process in anoxia section in waste water, and making can not be biochemical
Organic substance become can be biochemical, such that it is able to simultaneously by CODCr, ammonia nitrogen is effectively treated.Organic dirt in due to sewage
Dye thing mostly is macromolecule ring-type type organic, and these Organic substances are difficult to be degraded by good Institute of Micro-biology, water outlet NH3- N, COD etc. are difficult
Reach《Iron and steel enterprise's steel and iron industry pollution discharge standard》The requirement of (abbreviation standard), and cost of sewage disposal height, fortune
Row manages row outside the water after loaded down with trivial details, process and easily causes environmental pollution.
The content of the invention
To overcome above-mentioned technical disadvantages, the present invention to provide a kind of handling process of phenol-cyanogen sewage, it enhances biochemical anti-
The pre-treatment of Ying Chi, using chemical method cyanogen and big portion's Organic substance are removed, and then using double film process, will remove cyanogen root and big portion
The sewage for dividing Organic substance is divided into clear liquid and dope, has been substantially free of the impurity such as organic thing in clear liquid, can be used as other workshops
Industrial water；And dope proceeds biochemical treatment, from a biochemistry pool water part out as quenching water, another part depth
Qualified discharge after change process.
The present invention solves the technical method that adopted of its technical problem：A kind of handling process of phenol-cyanogen sewage, its technique
Step is：
The first step：Sodium hypochlorite is first added in phenol-cyanogen sewage, sodium hypochlorite is to remove cryanide ion and its chemical combination in sewage
The effective ways of thing, under conditions of controlling appropriate pH, add NaClO solution in waste water, make CN-It is oxidized to CO2And N2, instead
Should be as follows：
CN-+ClO-+H2O→CNCl+2OH-
CNCl+2OH-→CNO-+Cl-+H2O
2CNO-+3ClO-→CO2↑+N2↑+3Cl-+CO3 2-
Sodium hypochlorite is strong oxidizer, can remove most of Organic substance in wastewater containing phenol and cyanide, alleviates subsequent biochemical process
Difficulty；
Second step：React in the phenol-cyanogen sewage after a period of time to the first step and add ferrous sulfate, make excessive hypochlorous acid
Sodium and ferrous sulfate concerted reaction, produce the very strong free radical of oxidability, decompose the Organic substance in sewage, by wastewater containing phenol and cyanide
COD is reduced to below 800mg/L from 4000mg/L or so；
3rd step：Phenol-cyanogen sewage after second step process is processed using the bi-membrane method of ultrafilter membrane and reverse osmosis membrane,
So as to sewage is changed into into two kinds of clear liquid and dope, and make the COD of clear water less than 10mg/L, the concentration of water outlet reaches《Circulation is cold
But water is with Standard of reclaimed water (HG/T 3923-2007)》In requirement；
4th step：3rd step generates the dope for coming and proceeds biochemical treatment, and part is used as quenching water, and remaining
Then continuation carries out advanced treating to dope with flocculant, outer row after precipitation separation.
The invention has the beneficial effects as follows：The first, strong oxidizer sodium hypochlorite is applied to the early stage of wastewater containing phenol and cyanide and processes；
It two is to use cooperatively sodium hypochlorite with ferrous iron, using the free radical cracking Organic substance for producing；Meanwhile, utilize
Ferrous reduction, eliminates impact of the sodium hypochlorite to biochemistry pool microorganism；It three is that double film process are applied at biochemistry
Before reason, the difficulty of biochemical treatment is reduced；Arrange not outside water with cost of sewage disposal is low, operational management simple, after processing
The advantages of polluting again.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific embodiment
With reference to embodiment, the present invention is further described.
Referring to Fig. 1, a kind of handling process of phenol-cyanogen sewage, its processing step is：
The first step：Sodium hypochlorite is first added in phenol-cyanogen sewage, sodium hypochlorite is to remove cryanide ion and its chemical combination in sewage
The effective ways of thing, under conditions of controlling appropriate pH, add NaClO solution in waste water, make CN-It is oxidized to CO2And N2, instead
Should be as follows：
CN-+ClO-+H2O→CNCl+2OH-
CNCl+2OH-→CNO-+Cl-+H2O
2CNO-+3ClO-→CO2↑+N2↑+3Cl-+CO3 2-
Sodium hypochlorite is strong oxidizer, can remove most of Organic substance in wastewater containing phenol and cyanide, alleviates subsequent biochemical process
Difficulty；
Second step：The phenol-cyanogen sewage after a period of time is reacted to the first step and adds ferrous sulfate, excessive sodium hypochlorite with
Ferrous sulfate concerted reaction, below 800mg/L is reduced to by the COD of wastewater containing phenol and cyanide from 4000mg/L or so；
3rd step：Phenol-cyanogen sewage after second step process is processed using the bi-membrane method of ultrafilter membrane and reverse osmosis membrane,
So as to sewage is changed into into two kinds of clear liquid and dope, and make the COD of clear water less than 10mg/L, the concentration of water outlet equally reaches
《Recirculated cooling water is with Standard of reclaimed water (HG/T 3923-2007)》In requirement；
4th step：3rd step generates the dope for coming and proceeds biochemical treatment, and is partially converted into quenching water, and remains
Then continuation flocculant carries out advanced treating to remaining dope, and will arrange outside water after finally being precipitated.
The invention has the characteristics that：The first, strong oxidizer sodium hypochlorite applies the early stage in wastewater containing phenol and cyanide to process, profit
With the strong oxidizing property degradation of organic substances of sodium hypochlorite；
It two is to use cooperatively sodium hypochlorite with ferrous iron, using the further degradation of organic substances of free radical for producing；It three
It is that double film process were applied before biochemical treatment, reduces the difficulty of biochemical treatment；With cost of sewage disposal it is low, operation pipe
Reason is simple, process after water can with standard discharge the advantages of.
Claims (1)
1. a kind of handling process of phenol-cyanogen sewage, it is characterised in that processing step is：
The first step：Sodium hypochlorite is first added in phenol-cyanogen sewage, under conditions of controlling appropriate pH, adds NaClO molten in waste water
Liquid, makes CN-It is oxidized to CO2And N2, react as follows：
CN-+ClO-+H2O→CNCl+2OH-
CNCl+2OH-→CNO-+Cl-+H2O
2CNO-+3ClO-→CO2↑+N2↑+3Cl-+CO3 2-；
Second step：To the first step react a period of time after phenol-cyanogen sewage in add ferrous sulfate, make excessive sodium hypochlorite with
Ferrous sulfate concerted reaction, produces the very strong free radical of oxidability, decomposes the Organic substance in sewage, by the COD of wastewater containing phenol and cyanide from
4000mg/L or so is reduced to below 800mg/L；
3rd step：Phenol-cyanogen sewage after second step process is processed using the bi-membrane method of ultrafilter membrane and reverse osmosis membrane, so as to
Sewage is changed into into two kinds of clear liquid and dope, and makes the COD of clear water less than 10mg/L, the concentration of water outlet reaches《Recirculated cooling water
With Standard of reclaimed water (HG/T 3923-2007)》In requirement；
4th step：3rd step generates the dope for coming and proceeds biochemical treatment, and part as quenching water, and remaining dope
Then continuation carries out advanced treating with flocculant, outer row after precipitation separation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510355955.3A CN105036459B (en) | 2015-06-25 | 2015-06-25 | Treatment process for phenol-cyanogen wastewater |
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| CN201510355955.3A CN105036459B (en) | 2015-06-25 | 2015-06-25 | Treatment process for phenol-cyanogen wastewater |
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| CN105036459B true CN105036459B (en) | 2017-05-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106348426A (en) * | 2016-10-27 | 2017-01-25 | 湖南科瑞生物制药股份有限公司 | Treating method for cyanide-containing industrial wastewater |
| CN111908710B (en) * | 2020-07-03 | 2023-05-19 | 宁夏博安生物科技有限公司 | Phenol-containing wastewater treatment system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041534A (en) * | 2007-04-27 | 2007-09-26 | 济南晶恒有限责任公司 | Electroplating wastewater treatment reclaiming technique |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041534A (en) * | 2007-04-27 | 2007-09-26 | 济南晶恒有限责任公司 | Electroplating wastewater treatment reclaiming technique |
Non-Patent Citations (1)
| Title |
|---|
| 蒋辉."焦化废水的深度处理技术研究".《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》.2012,(第3期),第12页倒数第4段、第26页第1段. * |
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Address after: 512600 Guangdong City, Ruyuan Province, the town of the ancient town of Eagle Peak Road, former Civil Affairs Bureau office building, building 401, four Applicant after: Guangdong cloud Environment Technology Co., Ltd. Address before: Ring road 512700 Guangdong city of Shaoguan province Ruyuan County dairy town No. 9 (old procuratorate office building 2 floor) Applicant before: Shaoguan Lang Run Environmental Protection Technology Co., Ltd |
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