CN105036459A - Treatment process for phenol-cyanogen wastewater - Google Patents
Treatment process for phenol-cyanogen wastewater Download PDFInfo
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- CN105036459A CN105036459A CN201510355955.3A CN201510355955A CN105036459A CN 105036459 A CN105036459 A CN 105036459A CN 201510355955 A CN201510355955 A CN 201510355955A CN 105036459 A CN105036459 A CN 105036459A
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- phenol
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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, relate to a kind for the treatment of 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, has reclaimed the multiple industrial chemicals such as tar, benzene, phenol simultaneously.Coke-oven gas is in de-naphthalene, desulfurization, take off in benzene scavenging process except ammonia, whole cold-peace, and each operation all produces some sewage---phenol-cyanogen sewages containing phenol, cyanogen, ammonia nitrogen.Phenol-cyanogen sewage mainly comprises coking production sewage, ammonia still process sewage, the supporting desalted water station sewer of coke dry quenching boiler, water in water circulating system with water and sanitary sewage and early-stage rainwater etc., wherein, a large amount of toxic substances such as phenol, cyanogen is contained in coking production sewage and ammonia still process sewage, and the pollutent such as ammonia nitrogen, tar, if not treated just direct discharge can cause significant damage to environment.
The phenol-cyanogen sewage process of most domestic coke-oven plant adopts biochemical treatment process; biochemical treatment process is a kind for the treatment of process developing in original phenol removal technique and come; pretreatment unit is added in originally single treatment scheme; be provided with grease removal tank, flotation cell etc., removing be light, tar heavy oil and oil in water emulsion; Increase equalizing tank, tentatively water quality is regulated; Improve aeration system, wastewater containing phenol and cyanide enters aeration tank again and carries out aeration after preaeration, the waste water after process and returned sluge is turned back to aeration tank again and carries out advanced treatment.
Although biochemical process can effectively reduce Phenol for Waste Water, cyanogen, wet goods pollutent, to COD
cr, ammonia nitrogen process but can not reach desirable effect.
In order to effectively remove the COD in waste water
cr, ammonia nitrogen, effluent quality is made to meet discharging standards requirement, bio-denitrification technology appears in wastewater containing phenol and cyanide treatment process as a kind of new and effective technology, and biological denitrificaion is the application of nitrification and denitrification reaction, and nitrification and denitrification reaction is biological denitrificaion 2 organic integral parts.Biological denitrificaion comprises aerobic and anoxic two sections of biological processes, namely nitrification and denitrification reaction bonded is got up, and the nitrification and denitrification completing ammonia nitrogen separates out the process of nitrogen.By the treatment process of anoxic and aerobic combination, it not only makes the NH after process in water
3-N and NO
x-N concentration is down to minimum, the organism degraded in water, and the organism of part difficult degradation in waste water is able to open chain process in anoxic section, make can not biochemical organism become can be biochemical, thus can simultaneously by COD
cr, ammonia nitrogen effectively processes.Because the organic pollutant in sewage mostly is polymer ring-type type organic, these organism are difficult to be degraded by good Institute of Micro-biology, water outlet NH
3the very difficult requirement reaching " iron and steel enterprise's Iron And Steel Industry pollution discharge standard " (abbreviation standard) such as-N, COD, and cost of sewage disposal is high, operational management is loaded down with trivial details, water after process is arranged outward and easily caused environmental pollution.
Summary of the invention
For overcoming above-mentioned technical disadvantages, the invention provides
a kind ofthe treatment process of phenol-cyanogen sewage, it enhances the pre-treatment of biochemical reaction tank, chemical method is utilized to remove cyanogen and large portion organism, then two film process is utilized, to remove cyanogen root and the organic sewage of major part is divided into clear liquid and dope, substantially not containing impurity such as organism in clear liquid, can as the water of productive use in other workshop; And dope proceeds biochemical treatment, from biochemistry pool out water a part as breath burnt water, another part in-depth process after qualified discharge.
The present invention solves the technological method that its technical problem adopts:
a kind ofthe treatment process of phenol-cyanogen sewage, its processing step is:
The first step: first add clorox in phenol-cyanogen sewage, clorox is the effective ways removing cryanide ion and compound thereof in sewage, under controlling the condition of suitable pH, adds NaClO solution in waste water, makes CN+ be oxidized to CO
2and N
2, react as follows:
CN
-+ClO
-+H
2O→CNCl+2OH
-
CNCl+2OH
-→CNO+Cl
-+H
2O
2CNO
-+3ClO
-→CO
2↑+N2↑+3Cl-+CO
3 2?
Clorox is strong oxidizer, can remove most of organism in wastewater containing phenol and cyanide, alleviate the difficulty of subsequent biochemical process;
Second step: react in the phenol-cyanogen sewage after for some time to the first step and add ferrous sulfate, make excessive clorox and ferrous sulfate concerted reaction, produce the very strong free radical of oxidation capacity, decompose the organism in sewage, the COD of wastewater containing phenol and cyanide is reduced to less than 800 from about 4000;
3rd step: use the bi-membrane method of ultra-filtration membrane and reverse osmosis membrane to process to the phenol-cyanogen sewage after second step process, thus sewage is changed into clear liquid and dope two kinds, and making the COD of clear water be less than 10, the concentration of water outlet reaches the requirement in " recirculated cooling water Standard of reclaimed water (HG/T3923-2007) ";
4th step: the dope that the 3rd step generates out proceeds biochemical treatment, and part is as the burnt water of breath, remain dope then continuation flocculation agent carry out advanced treatment, outer row after precipitation separation.
The invention has the beneficial effects as follows: the first, strong oxidizer clorox is applied to the process in early stage of wastewater containing phenol and cyanide;
It two is, by clorox with ferrous with the use of, utilize the free radical cracking organism produced; Meanwhile, utilize ferrous reductive action, eliminate the impact of clorox on biochemistry pool microorganism; It three is that two film process reduces the difficulty of biochemical treatment before being applied in biochemical treatment; Have that cost of sewage disposal is low, operational management is simple, water after process arranges advantages such as can not polluting again outward.
Accompanying drawing explanation
Fig. 1 is present invention process schema.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
see Fig. 1, a kind ofthe treatment process of phenol-cyanogen sewage, its processing step is:
The first step: first add clorox in phenol-cyanogen sewage, clorox is the effective ways removing cryanide ion and compound thereof in sewage, under controlling the condition of suitable pH, adds NaClO solution, make CN in waste water
-be oxidized to CO
2and N
2, react as follows:
CN
-+ClO
-+H
2O→CNCl+2OH
-
CNCl+2OH
-→CNO+Cl
-+H
2O
2CNO
-+3ClO
-→CO
2↑+N
2↑+3Cl-+CO
3 2?
Clorox is strong oxidizer, can remove most of organism in wastewater containing phenol and cyanide, alleviate the difficulty of subsequent biochemical process;
Second step: react the phenol-cyanogen sewage after for some time to the first step and add ferrous sulfate, excessive clorox and ferrous sulfate concerted reaction, be reduced to less than 800 by the COD of wastewater containing phenol and cyanide from about 4000;
3rd step: use the bi-membrane method of ultra-filtration membrane and reverse osmosis membrane to process to the phenol-cyanogen sewage after second step process, thus sewage is changed into clear liquid and dope two kinds, and making the COD of clear water be less than 10, the concentration of water outlet reaches the requirement in " recirculated cooling water Standard of reclaimed water (HG/T3923-2007) " equally;
4th step: the dope that the 3rd step generates out proceeds biochemical treatment, and be partially converted into breath Jiao water, remain dope then continuation flocculation agent carry out advanced treatment, and after finally precipitating, water to be arranged outward.
The present invention has following characteristics: the first, and strong oxidizer clorox is applied in the process in early stage of wastewater containing phenol and cyanide, utilizes the strong oxidizing property degradation of organic substances of clorox;
It two is, by clorox with ferrous with the use of, utilize the further degradation of organic substances of free radical produced; It three is that two film process reduces the difficulty of biochemical treatment before being applied in biochemical treatment; Have that cost of sewage disposal is low, operational management is simple, water after process can the advantage such as standard discharge.
Claims (1)
1.
a kind ofthe treatment process of phenol-cyanogen sewage, is characterized in that processing step is:
The first step: first add clorox in phenol-cyanogen sewage, clorox is the effective ways removing cryanide ion and compound thereof in sewage, under controlling the condition of suitable pH, adds NaClO solution in waste water, makes CN+ be oxidized to CO
2and N
2, react as follows:
CN
-+ClO
-+H
2O→CNCl+2OH
-
CNCl+2OH
-→CNO+Cl
-+H
2O
2CNO
-+3ClO
-→CO
2↑+N2↑+3Cl-+CO
3 2?
Clorox is strong oxidizer, can remove most of organism in wastewater containing phenol and cyanide, alleviate the difficulty of subsequent biochemical process;
Second step: react in the phenol-cyanogen sewage after for some time to the first step and add ferrous sulfate, make excessive clorox and ferrous sulfate concerted reaction, produce the very strong free radical of oxidation capacity, decompose the organism in sewage, the COD of wastewater containing phenol and cyanide is reduced to less than 800 from about 4000;
3rd step: use the bi-membrane method of ultra-filtration membrane and reverse osmosis membrane to process to the phenol-cyanogen sewage after second step process, thus sewage is changed into clear liquid and dope two kinds, and making the COD of clear water be less than 10, the concentration of water outlet reaches the requirement in " recirculated cooling water Standard of reclaimed water (HG/T3923-2007) ";
4th step: the dope that the 3rd step generates out proceeds biochemical treatment, and part is as the burnt water of breath, remain dope then continuation flocculation agent carry out advanced treatment, outer row after precipitation separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510355955.3A CN105036459B (en) | 2015-06-25 | 2015-06-25 | Treatment process for phenol-cyanogen wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510355955.3A CN105036459B (en) | 2015-06-25 | 2015-06-25 | Treatment process for phenol-cyanogen wastewater |
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|---|---|
| CN105036459A true CN105036459A (en) | 2015-11-11 |
| CN105036459B CN105036459B (en) | 2017-05-17 |
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ID=54443509
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111908710A (en) * | 2020-07-03 | 2020-11-10 | 严惠琴 | 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 |
-
2015
- 2015-06-25 CN CN201510355955.3A patent/CN105036459B/en active Active
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》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111908710A (en) * | 2020-07-03 | 2020-11-10 | 严惠琴 | Phenol-containing wastewater treatment system |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105036459B (en) | 2017-05-17 |
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