CN201932986U - Disposal system capable of improving biodegradability of coking wastewater - Google Patents
Disposal system capable of improving biodegradability of coking wastewater Download PDFInfo
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- CN201932986U CN201932986U CN2011200158958U CN201120015895U CN201932986U CN 201932986 U CN201932986 U CN 201932986U CN 2011200158958 U CN2011200158958 U CN 2011200158958U CN 201120015895 U CN201120015895 U CN 201120015895U CN 201932986 U CN201932986 U CN 201932986U
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- hydrolytic acidification
- hydrolytic
- acidication
- biodegradability
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Abstract
The utility model relates to a disposal system capable of improving biodegradability of coking wastewater, which belongs to the technical field of sewage disposal and is mainly formed by a sequential connection of a first hydrolytic acidification pool, a first sedimentation tank, a second hydrolytic acidification pool and a second sedimentation tank. On the basis of traditional method of hydrolytic acidification, the disposal system increases two-level acidification, sedimentation and sludge reflux, thereby strengthening hydrolytic acidification effect. Meanwhile, micro-aerating devices are arranged in the hydrolytic acidification pools to regulate the content of dissolved oxygen in the hydrolytic acidification pools, thereby providing a preferable living environment for hydrolytic bacteria and acid forming bacteria, strengthening sludge turbulence in the hydrolytic acidification pools so as to avoid precipitation of sludge and enable microorganisms to contact with organic matters adequately, and improving degradation efficiency of organic pollutants and biodegradability of wastewater. In addition, parts of the sludge in the sedimentation tanks are flowed back to the hydrolytic acidification pools so as to enable the hydrolytic acidification pools to maintain relative abundant and stable microfloras, thereby guaranteeing the stable proceeding of hydrolytic acidification reaction.
Description
Technical field
The utility model belongs to technical field of sewage, is specifically related to a kind of acidication system that helps promoting the coking chemical waste water biodegradability.
Background technology
Coking chemical waste water is mainly derived from production processes such as high temperature carbonization, gas purification and the Chemicals of raw coal are refining.Waste water quality can and reclaim the different differences to some extent of product because of ature of coal, coking production technology, but coking chemical waste water generally all has COD content height (more than 3000mg/L), NH
3-N content height (more than 1500mg/L), complicated component (containing a large amount of phenol, cyanogen, sulfide, polycyclic aromatic hydrocarbons, quinoline, pyridine, wet goods complex compound), the poor (BOD of biodegradability
5/ COD is between 0.15～0.3) etc. characteristic, belong to the bigger industrial organic waste water of intractability, both at home and abroad to this existing big quantity research.
At present, the treatment process of coking chemical waste water can reduce three classes on the whole: the one, and physico-chemical process, mainly comprise ammonia still process method, burning method, coagulant sedimentation, absorption method etc., though physico-chemical process have less investment, processing ease, energy consumption low, strong to the variation adaptability of temperature, can reclaim in the waste water advantage such as useful component, but it is lower that physico-chemical process is removed efficient, especially lower to the organic clearance of small molecules in the waste water, often can only be as the pre-treatment of waste water.The 2nd, chemical method, mainly comprise FenTon reagent oxidation method, catalytic wet air oxidation, photochemical treatment method etc., these methods often only have higher place to go efficient to some pollutent in the waste water, can not guarantee all has higher place to go efficient to all contaminants, and most method also is in experiment and trial run stage.The 3rd, biochemical process mainly comprises the A/O method, A
2/ O method, SBR method etc., biochemical process is as the main body method of wastewater treatment, the technology comparative maturity, processing efficiency is higher, and cost of investment and running cost are also lower, have obtained widespread use in wastewater treatment, but since coking chemical waste water COD content height, NH
3-N content height, complicated component, biodegradability is poor, uses traditional biochemical process to have the report of better treatment effect less to coking chemical waste water at present, numerous scholars and engineering technical personnel are actively inquiring into the measure that improves the coking chemical waste water biodegradability, solve the problem of Treatment of Coking Effluent difficulty to the greatest extent.
The common technology that improves the coking chemical waste water biodegradability mainly is the acidication method, this method is to consider that methanogen is different with the hydrolysis acid-producing bacteria speed of growth, anaerobic treatment is controlled at the two-stage before the short anaerobic treatment of reaction times section, promptly at a large amount of hydrolytic bacterias, be dissolved organic matter with insoluble hydrolysis of organic matter under the acid-producing bacteria effect, the macromolecular substance of difficult for biological degradation is converted into the small-molecule substance of readily biodegradable, not only improved the biodegradability of waste water, a part of organic pollutant of can also degrading, reduced follow-up processing load, and because it is simple in structure, investment cost and working cost are all lower, have obtained using widely in wastewater treatment.But traditional hydrolysis acidization is many based on static reaction, does not have mud to reflux, and mass-transfer efficiency is lower, and biochemical reaction rate is also lower, only limits to the application in middle low concentration wastewater is handled mostly.The coking chemical waste water higher for organic concentration, that water quality is complicated, biodegradability is relatively poor, traditional hydrolysis acidization is very limited to the biodegradability that improves coking chemical waste water.At the problems referred to above, the utility model improves traditional hydrolysis acidification technique facility, in the hope of opening up approach for the unmanageable problem of coking chemical waste water.
Summary of the invention
The purpose of this utility model is the characteristic poor at the coking chemical waste water biodegradability, that intractability is big, and a kind of novel acidication system is provided, and to improve the biodegradability of coking chemical waste water, reduces the intractability of coking chemical waste water.
Based on above-mentioned purpose, the utility model has been taked following technical scheme: a kind of treatment system that improves the coking chemical waste water biodegradability, and mainly by acidication one pond, precipitation one pond, acidication two ponds with precipitate two ponds and be connected in sequence.
Be equipped with little aerating apparatus in described acidication one pond and acidication two ponds.
From precipitating a pond to acidication one pond, respectively be provided with the mud return flow line to acidication two ponds from precipitating two ponds.
The acidication degree to coking chemical waste water is strengthened in the utility model utilization two-stage acidication unit, utilize little aerating apparatus to regulate dissolved oxygen content in the hydrolysis acidification pool, for the existence of hydrolytic bacteria and acid-producing bacteria provides aerobic environment preferably (usually, it is relatively more suitable that DO concentration is controlled at 0.3～0.5mg/L), also strengthened the turbulence of mud in acidification pool simultaneously, prevent sludge settling, microorganism is contacted more fully with organism, thereby improve organic degradation efficiency.On the other hand, this system also lays settling tank behind hydrolysis acidification pool, and make that part mud is back to hydrolysis acidification pool (excess sludge discharge focuses on) in the settling tank in sludge treating system, this can not only make the abundant and stable relatively microorganism species of maintenance in the hydrolysis acidification pool, also can make reactive system produce the intensive turbulence, form a large amount of pulsation and vortex, quickening mass transfer, thereby improve the degradation efficiency of organic pollutant greatly.
Except that coking waste water, above-mentioned treatment system also is applicable to the trade effluent of other organic loading height, contaminant component complexity, biodegradability difference.Utilize the dynamic acidication treatment system of two-stage of the present utility model Treatment of Wastewater in Coking, can make the biodegradability of waste water improve (BOD greatly
5/ COD brings up between 0.4～0.5), and can degrade COD and 40% above NH more than 35%
3-N has reduced the mud generation, stops mud to enter follow-up aerobic biochemical system, has reduced the influence to aerobic biochemical system.Simultaneously, the microorganism species that is in the dynamic acidication system is stable, and the sewage turbulence is violent, and organism and microorganism full contact make system stability, and shock-resistant ability is stronger.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
A kind of treatment system that improves the coking chemical waste water biodegradability as shown in Figure 1, mainly by acidication one pond, precipitation one pond, acidication two ponds with precipitate two ponds and be connected in sequence, is equipped with little aerating apparatus in acidication one pond and acidication two ponds.In addition, from precipitating a pond to acidication one pond, also respectively be provided with the mud return flow line to acidication two ponds from precipitating two ponds.
Coking chemical waste water is gone into hydrolysis acidifying one pond through materialization system handles such as ammonia still process, air supporting, coagulating sedimentation are laggard, the larger molecular organics of difficult degradation is converted into the small-molecule substance of readily biodegradable in the waste water under hydrolytic bacteria, acid-producing bacteria effect, enter precipitation one pond then, carry out mud-water separation, a mud part that precipitates is back to acidication one pond, keep the stable of the interior microorganism species of hydrolysis acidification pool, unnecessary mud enters sludge treating system and handles.For further degradation of organic substances, improve the biodegradability of waste water, precipitate a pond water outlet and enter acidication two ponds again and degrade, enter follow-up aerobic biochemical system and be for further processing through precipitating two pond post precipitations more at last.After The two-stage dynamic acidication system handles, the BOD of coking chemical waste water
5/ COD can bring up to about 0.45, and COD is reduced to below the 1000mg/L, and the biodegradability of waste water is improved greatly, and intractability reduces significantly.In addition, the following parameter of controlling well in the engineering practice then can make this system reach better operating performance: the first, and DO concentration is between 0.3～0.5mg/L in the control hydrolysis acidification pool; The second, the pH value is 8～9 in the control hydrolysis acidification pool; The 3rd, according to hydrolysis acidification pool water inlet COD, BOD
5Concentration determines that the hydrolysis acidification pool pond holds and the residence time.
Claims (3)
1. a treatment system that improves the coking chemical waste water biodegradability is characterized in that, this system comprises acidication one pond, precipitation one pond, acidication two ponds that connect successively and precipitates two ponds.
2. treatment system as claimed in claim 1 is characterized in that, is equipped with little aerating apparatus in described acidication one pond and acidication two ponds.
3. treatment system as claimed in claim 1 or 2 is characterized in that, from precipitating a pond to acidication one pond, respectively be provided with the mud return flow line from precipitating two ponds to acidication two ponds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200158958U CN201932986U (en) | 2011-01-19 | 2011-01-19 | Disposal system capable of improving biodegradability of coking wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200158958U CN201932986U (en) | 2011-01-19 | 2011-01-19 | Disposal system capable of improving biodegradability of coking wastewater |
Publications (1)
| Publication Number | Publication Date |
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| CN201932986U true CN201932986U (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200158958U Expired - Fee Related CN201932986U (en) | 2011-01-19 | 2011-01-19 | Disposal system capable of improving biodegradability of coking wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503051A (en) * | 2011-12-30 | 2012-06-20 | 内蒙古伊利实业集团股份有限公司 | Method for treating wastewater from dairy processing |
| CN107337280A (en) * | 2017-09-13 | 2017-11-10 | 哈尔滨工业大学 | A kind of industrial park sewage plant reactor for hydrolysis and acidification |
| CN114164153A (en) * | 2021-12-10 | 2022-03-11 | 恒臻(无锡)生物科技有限公司 | Acid-producing bacteria and system and method for one-pot boiling process for treating edible gelatin production wastewater by using same |
-
2011
- 2011-01-19 CN CN2011200158958U patent/CN201932986U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503051A (en) * | 2011-12-30 | 2012-06-20 | 内蒙古伊利实业集团股份有限公司 | Method for treating wastewater from dairy processing |
| CN107337280A (en) * | 2017-09-13 | 2017-11-10 | 哈尔滨工业大学 | A kind of industrial park sewage plant reactor for hydrolysis and acidification |
| CN114164153A (en) * | 2021-12-10 | 2022-03-11 | 恒臻(无锡)生物科技有限公司 | Acid-producing bacteria and system and method for one-pot boiling process for treating edible gelatin production wastewater by using same |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20120119 |