CN1792895A - Tech. for biochemical treating sulphur-containing chark waste water of high concentrating high ammonia nitrogen - Google Patents
Tech. for biochemical treating sulphur-containing chark waste water of high concentrating high ammonia nitrogen Download PDFInfo
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- CN1792895A CN1792895A CNA2005100573714A CN200510057371A CN1792895A CN 1792895 A CN1792895 A CN 1792895A CN A2005100573714 A CNA2005100573714 A CN A2005100573714A CN 200510057371 A CN200510057371 A CN 200510057371A CN 1792895 A CN1792895 A CN 1792895A
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
A biochemical process for treating the high-concentration coking sewage with high contents of ammoniacal nitrogen and S includes such steps as mixing it with the water returned from multi-layer mineralized garbage bioreactor bed, laying aside, taking supernatant, treating is said bioreactor bed, and returning part of the treated water for mixing with said coking sewage and the rest back to production line or discharging it.
Description
Technical field
The invention belongs to the technical field of waste water processing in the environment project, be specifically related to the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of a kind of high density biochemical processing process.
Background technology
Coking chemical waste water is by producing in the high temperature carbonization of raw coal, gas purification and the Chemicals treating process.Coking chemical waste water is mainly from coal washing, the processing of quenching and byproduct and treating process, and coking chemical waste water is brown, and is highly seasoned unpleasant, complicated component, toxicity is big.Its composition and character is with the kind and the quality of coking coal, carbonization temperature, the refining and chemical plant product recovery technology of coal gas and different.The contained pollutent of waste water mainly comprises toxic substances such as phenol, ammonia nitrogen, prussiate, thiocyanide, sulfide, benzene, tar, and heterocyclic arene and polycyclic aromatic hydrocarbons such as pyridine, quinoline, indoles, naphthalene, phenanthrene, anthracene.These pollutents are the bio-refractory things except that phenol mostly, and this makes coking chemical waste water become a kind of waste water of difficult biological treatment.
The treatment process of China's present stage coking chemical waste water mainly is divided into biological treatment and materilization freatment method.Materilization freatment method generally is wet oxidation process, strong oxidizer oxidation style, ultraviolet catalytic method, coagulating treatment, absorption, ion-exchange, or the cooperation of several method.The materialization Treatment of Wastewater in Coking realizes that industrial application is fewer, and chief reason is that the physical chemistry method Treatment of Wastewater in Coking exists cost too high, and perhaps the object of Chu Liing is single, and COD and ammonia nitrogen are not handled and handled simultaneously, perhaps the problems such as poor stability of Chu Liing.Biological treatment generally comprises conventional activated sludge process, generally adopts A-O technology or A-A-O technology.The method that the coking chemical waste water factory in the whole nation about 90% adopts is conventional activated sludge process.The Wastewater Treated by Activated Sludge Process coking chemical waste water is exactly to keep sludge concentration certain in the waste water and continuous aeration, makes good use of the breathing of oxygen animalcule and adsorption is removed pollutent from waste water method.The COD and the ammonia nitrogen removal frank of conventional activated sludge method Treatment of Wastewater in Coking are very low, and processing rate that there are some researches show COD is less than 60%, and organonitrogen is converted into ammonia nitrogen and makes ammonia nitrogen growth occur on the contrary sometimes.In addition, the Wastewater Treated by Activated Sludge Process coking chemical waste water need consume a large amount of dilution waters, and water outlet but far can not be up to standard.Coking chemical waste water for high density, high ammonia nitrogen and high sulfur content, because too high sulphur and ammonia nitrogen are all to the toxic effect of microorganism, conventional activated sludge process is direct Treatment of Wastewater in Coking especially just, must dilute or desulfurization removing nitric before entering bio-reactor, this can cause the increase significantly of cost for wastewater treatment again.
Summary of the invention
The present invention is directed to the problem that existing Wastewater Treated by Activated Sludge Process coking chemical waste water exists, propose a kind of biofloculation technology and with the direct Treatment of Wastewater in Coking of multi-layer type mineralized refuse bioreactor coupling, especially handled the technology of high density, high ammonia nitrogen and high sulfur content coking chemical waste water.This Technology has that flow process is brief, energy consumption is low, simple to operate, working cost is low, the multi-layer type mineralized refuse bioreactor that adopts is easy to characteristics such as amplification, thereby have great application prospect aspect utilizing in Treatment of Coking Effluent.
The present invention adopts the biofloculation technology and with the direct Treatment of Wastewater in Coking of multi-layer type mineralized refuse bioreactor coupling, technology mainly comprises following two portions:
(1) bioflocculation process:
The former coking chemical waste water that at first will handle and mix from the reflux ratio of the effusive treating water of multi-layer type mineralized refuse bioreactor by 1: 1～1: 2, add a spot of phosphoric acid in case of necessity and regulate the pH value of mixed solution, at this moment, because chemistry or physical action can produce biological coagulation phenomenon, generate solid sediment, leave standstill after the clarification certain hour, supernatant liquor is as the water inlet of multi-layer type mineralized refuse bioreactor, the precipitated product of settling pond bottom can be used as the nucleus that the supersaturation solute is separated out in the waste water, cause more substantial precipitation to produce, after the precipitation accumulation is many, can get rid of a part, dispose through landfill or other method.In leaving standstill clarifying process,, leave standstill for some time and help nitrate radical and react with it, thereby make the sulfonium ion density loss if the sulfide in the waste water is too much.
(2) the multi-layer type mineralized refuse bioreactor is handled:
The supernatant liquor that the biological coagulation of front-leave standstill is come out after the clarification is as the water inlet of this bio-reaction bed, to intake with spray or mode such as drip irrigation and to be sprinkled upon first bed face at top equably, after nethermost bed begins water outlet, check relevant index wherein, when desired technical indicator arrives required value, stop to supply water, allow the water in the bed freely fall dried, when the moisture content of the first bed upper surface falls to doing, begin to repeat primary water supply again and fall dried, so adopt periodic water inlet continuously---the over-over mode operation that bed freely falls dried, through the effusive water that reaches emission standard after handling, a part refluxes and mixes with pending former coking chemical waste water, and another part discharges or gets back in the production and use, thereby finish whole wastewater treatment process, realize waste water reclaiming.
The multi-layer type mineralized refuse bioreactor that adopts among the present invention is with the porous filler of mineralized waste as fixation of microbe, many bed structures of the reoxygenation of structurally having taked to be easy to ventilate.It is made of at the intravital multilayer mineralized waste of bed bed reaction bed body and pitch arrangement, the bottom of every layer of mineralized waste bed is a porous support plate, be furnished with one deck reticulated or skim rubble on it, be the mineralized waste filler again on it, space between each layer of mineralized waste bed communicates with outside atmosphere, the top of reaction bed is provided with the porousness water supply line, leaves standstill in the supernatant liquor input reaction bed that obtains in the clarification operation last.The thickness of every layer of mineralized waste bed is that 0.5-1.0m is preferable.The mineralized waste filler that is adopted is the porous particles material that screens from the domestic refuse of landfill more than 8 years.The reaction bed body is a frame-type or for bed is distributed with the barrel-type of ventilating pit on the wall, and the space between each layer of mineralized waste bed directly communicates with outside atmosphere by the ventilating pit that distributes on the reaction bed wall or by framework.Can adopt multiple shape as required on the reaction bed profile, steel construction or concrete structure all can.Mineralized waste has huge cation exchange capacity, so can adsorb a large amount of ammonia nitrogens, this has created good condition for the removal of ammonia nitrogen, and this is that mineralized refuse bioreactor has one of reason of higher ammonia nitrogen removal frank.Abundant immobilized microorganism has the ability that very strong degradation of organic substances is removed COD in the mineralized waste, and simultaneously by nitration denitrification, approach such as short-cut nitrification and denitrification are removed ammonia nitrogen.In the unit operation that uses mineralized refuse bioreactor to handle, mineralized waste is by the comprehensive removal that filtration is held back, adsorbed, mechanism such as degraded realizes COD, and effect is much larger than other biological treatment process, and anti-load impact ability is strong.Before the commencement of commercial operation of multi-layer type mineralized refuse bioreactor, adopt the method that progressively improves waste strength, microorganism is wherein tamed, till the influent concentration that the waste strength that is used to tame is handled near actual needs.
Compare with the Wastewater Treated by Activated Sludge Process coking chemical waste water of present employing, this technology has following advantage:
(1) in wastewater treatment process, adopted treating water and former water to mix the phenomenon that produces biofloculation, formed a kind of new biofloculation technology, this step is obvious for the absorption removal effect of COD in the coking chemical waste water and other objectionable impurities, helps alleviating the load of subsequent handling.As PRETREATMENT OF THE COKING CHEMICAL WASTER WATER is a kind of technological innovation.
(2) on stream, adopted the multi-layer type mineralized refuse bioreactor, can tolerate the coking chemical waste water that contains ammonia nitrogen in high density and sulfide, so can under the situation of not desulfurization of not ammonia still process, directly handle to it as bio-reactor.Test confirms, handles not ammonia still process sulphur removal coking chemical waste water, is not less than in reflux ratio under 1 the situation to move, and this system's stable water outlet is suitable for reuse.On the basis of rationally regulating and managing, can realize qualified discharge.This means and save a large amount of processing costs and simplify technology.
(3) with not producing secondary pollution in this art breading coking chemical waste water process, compare with general activated sludge process, do not produce mud in biological treatment process, only produce the precipitation that is easy to focus in the process of flocculation, this precipitation can adopt the mud landfill to dispose.
(4) in the treating processes owing to need not aeration, energy consumption reduces in a large number.Have only the flocculation stage need carry out a spot of stirring, all the other are exactly the waste water conveying and spray required energy.
(5) equipment is simple, and is stable, and process management is convenient, and the anti impulsion load ability is strong, starts simple.Owing to do not need aeration, can save a lot of equipment; It is less that this technology is advanced the influence of water, and COD is when 2200～3600mg/l in water inlet, and water outlet is all very stable; In management owing to the distinctive advantage of this method, managerial difficult point can not appear; One of embrane method biggest advantage is an anti impulsion load, and this point finds full expression on mineralized refuse bioreactor; Find in actual motion, start the auxiliary measure that needs hardly, after for some time out of service, directly water inlet gets final product, and discovery in service, and for some time out of service can make effluent quality better.
(6) filler of Li Yonging is the rubbish of landfill yard landfill more than 8 years, and this technology makes it to realize resource utilization, and landfill yard can be realized sustainable use.Because available landfill yard land resources is fewer and feweri, and the rubbish that produces is more and more, and utilizing limited landfill space as much as possible is a great problem, so this point has very big social value.
Description of drawings
Fig. 1 is the schema of this technology;
Fig. 2 is the structural representation of the multi-layer type mineralized refuse bioreactor that uses in this technology.
Fig. 3 A, Fig. 3 B and Fig. 3 C are back up pad, reticulated or the skim metalling of wherein mineralized waste bed and the two dimensional structure synoptic diagram of this three-decker of mineralized waste filler.
Embodiment
The specific implementation process of this technology is described below in conjunction with Fig. 1:
With a kind of COD is 1900-3400mg/L, NH
3-N is that 1400-2950mg/L, the about 600mg/L of volatile phenol, sulfide are that 400-888mg/L, prussiate are about 74.3mg/L, the pH value is that the former water of coking chemical waste water of 9.67-9.82 and the recirculation water after the processing mixed by 1: 1, in recirculation water, add phosphoric acid, the pH of mixed in the mixing pit is adjusted in about 8.6.Agitated pool adopts the method for gas stirring, the waste water that mixes enters settling pond and leaves standstill clarification, waste water after the clarification evenly spray with the speed of 3-4L/h or drip irrigation thick at every layer of bed of a high 2.4m, the about 20cm of diameter be on the top layer of multi-layer type mineralized refuse bioreactor of 0.5m, in an one-day operational cycle, water inlet is 3-5 hour continuously, and all the other freely fall to doing the time for bed.Water outlet COD after the process reaction bed is handled is generally at 100～200mg/l, NH
3Sulfide and the phenol cyanogen of-N below 100mg/L, in the waste water almost is removed on 100% ground.A water outlet part refluxes and mixes with former water, and another part discharges or returns and is used for producing, and realizes utilization of wastewater resource, can be used for coal washing circulation make up water and quenching water as water outlet.In addition, owing to contain the ammonia nitrogen of high density in the coking chemical waste water, hazardous and noxious substances can also be utilized its nitrogenous fertilizer as liquid after removing.
The structure of the multi-layer type mineralized refuse bioreactor that uses in this technology is seen Fig. 2, and it is that the mineralized waste bed 3 of 0.5-1.0m is arranged in the frame-type reaction bed body 2 by certain interlamellar spacing and constitutes by every layer thickness.In conjunction with Fig. 3 A, Fig. 3 B and Fig. 3 C as seen, every layer of mineralized waste bed is by the porose back up pad 31 of a kind of uniform distribution and a kind of reticulated above it or skim metalling 32 supporting layer as the mineralized waste filler, topmost spread mineralized waste filler 33, the mineralized waste filler be from the stabilization of landfill more than 8 years domestic refuse the porous particles material that screens.The profile of multi-layer type mineralized refuse bioreactor as required or the place situation can be designed to cylindrical or other multiple profile, and the space between the bed directly communicates with outside atmosphere.If the reaction bed body is to adopt the barrel-type structure, the space between the bed then can communicate with outside atmosphere by the ventilating pit that distributes on the reaction bed wall.The top layout of bio-reaction bed be porousness water supply line 4, be used for spraying waste water downwards.The bottom of reaction bed can pick out pond 1, to make things convenient for water outlet.
Claims (6)
1, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density biochemical processing process, technology comprises following two portions:
(1) bioflocculation process:
The former coking chemical waste water that at first will handle and mix from the reflux ratio of the effusive treating water of multi-layer type mineralized refuse bioreactor by 1: 1～1: 2, send into settling pond again and leave standstill clarification, supernatant liquor after the clarification is sent into the multi-layer type mineralized refuse bioreactor and is handled, the nucleus that the precipitated product continuation of settling pond bottom is separated out as supersaturation solute in the waste water, cause more substantial precipitation to produce, after the precipitation accumulation how, exclusive segment is disposed through landfill or other method;
(2) the multi-layer type mineralized refuse bioreactor is handled:
The supernatant liquor that obtains after biofloculation is handled is sent into the multi-layer type mineralized refuse bioreactor, with spray or drip irrigation mode supernatant liquor is sprinkled upon equably first bed face at top by the porousness water supply line, after nethermost bed begins water outlet, check relevant index wherein, when desired technical indicator arrives required value, stop to supply water, allow the water in the bed freely fall dried, when the moisture content of the first bed upper surface falls to doing, begin to repeat primary water supply again and fall dried, the over-over mode operation of so adopting periodic water inlet-bed continuously freely to fall dried, through the effusive water that reaches emission standard after handling, a part refluxes and to mix with pending former coking chemical waste water, and another part discharges or gets back in the production and use, thereby finishes whole wastewater treatment process;
Described multi-layer type mineralized refuse bioreactor is made of at the intravital multilayer mineralized waste of bed bed reaction bed body and pitch arrangement; The bottom of every layer of mineralized waste bed is a porous support plate, is furnished with one deck reticulated or skim rubble on it, is furnished with the mineralized waste filler on it again; Space between each layer of mineralized waste bed communicates with outside atmosphere, and the top of bio-reaction bed is provided with the porousness water supply line.
2, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density according to claim 1 biochemical processing process, it is characterized in that: when former coking chemical waste water mixes with the treating water that refluxes from the multi-layer type mineralized refuse bioreactor, add phosphoric acid and regulate the pH of mixed solution between 7～9.
3, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density according to claim 1 biochemical processing process, it is characterized in that: the thickness of every layer of mineralized waste bed is 0.5-1.0m.
4, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density according to claim 1 biochemical processing process is characterized in that: the mineralized waste filler that is adopted is selected the porous particles material that screens for use from the domestic refuse of landfill more than 8 years.
5, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density according to claim 1 biochemical processing process, it is characterized in that: the reaction bed body adopts the barrel-type structure that is distributed with ventilating pit on tower structure or the bed wall, and the space between each layer of mineralized waste bed directly communicates with outside atmosphere by the ventilating pit that distributes on the reaction bed wall or by framework.
6, the high sulfur-bearing coking chemical waste water of the high ammonia nitrogen of high density according to claim 1 biochemical processing process, it is characterized in that: before the commencement of commercial operation of multi-layer type mineralized refuse bioreactor, adopt the method that progressively improves waste strength, microorganism is wherein tamed, till the influent concentration that the waste strength that is used to tame is handled near actual needs.
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| CNA2005100573714A CN1792895A (en) | 2005-11-08 | 2005-11-08 | Tech. for biochemical treating sulphur-containing chark waste water of high concentrating high ammonia nitrogen |
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| CNA2005100573714A CN1792895A (en) | 2005-11-08 | 2005-11-08 | Tech. for biochemical treating sulphur-containing chark waste water of high concentrating high ammonia nitrogen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101417850B (en) * | 2008-11-11 | 2010-10-13 | 江苏百纳环境工程有限公司 | Novel process for treating coking waste water by charging activated sludge process |
| CN101544421B (en) * | 2008-03-25 | 2012-01-11 | 宝山钢铁股份有限公司 | Method for treating coking wastewater |
| CN104445613A (en) * | 2014-03-29 | 2015-03-25 | 湖南碧源环保工程建设有限公司 | Mineralized refuse packed bed and wastewater denitrification method |
| CN108975552A (en) * | 2018-08-01 | 2018-12-11 | 西南交通大学 | A kind of processing method of landfill leachate |
-
2005
- 2005-11-08 CN CNA2005100573714A patent/CN1792895A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101544421B (en) * | 2008-03-25 | 2012-01-11 | 宝山钢铁股份有限公司 | Method for treating coking wastewater |
| CN101417850B (en) * | 2008-11-11 | 2010-10-13 | 江苏百纳环境工程有限公司 | Novel process for treating coking waste water by charging activated sludge process |
| CN104445613A (en) * | 2014-03-29 | 2015-03-25 | 湖南碧源环保工程建设有限公司 | Mineralized refuse packed bed and wastewater denitrification method |
| CN108975552A (en) * | 2018-08-01 | 2018-12-11 | 西南交通大学 | A kind of processing method of landfill leachate |
| CN108975552B (en) * | 2018-08-01 | 2021-06-15 | 西南交通大学 | Method for treating landfill leachate |
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