CN101659500A - Dye waste water treatment system - Google Patents
Dye waste water treatment system Download PDFInfo
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- CN101659500A CN101659500A CN200910092257A CN200910092257A CN101659500A CN 101659500 A CN101659500 A CN 101659500A CN 200910092257 A CN200910092257 A CN 200910092257A CN 200910092257 A CN200910092257 A CN 200910092257A CN 101659500 A CN101659500 A CN 101659500A
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Abstract
The invention provides a dye waste water treatment system which sequentially comprises a physico-chemical pretreatment system, an anaerobic tank, an aerobic tank and an advanced oxidation treatment system; dye waste water to be treated firstly enters into the physico-chemical pretreatment system to remove part chromaticity, sulphate and COD in the dye waste water, so as to ensure the pH, the alkalinity and the proper sulfate concentration which are needed by high-efficiency and stable running of later stage of anaerobic technique; after that, the dye waste water enters into the anaerobic tankto have anaerobic reaction and then enters the aerobic tank to have aerobic reaction; finally, the dye waste water enters into the advanced oxidation treatment system to remove the residual chromaticity and organic matter hard to degraded in the aerobic effluent as well as intermediate metabolite generated in the process of biological treatment. When being used for treating the dye waste water, especially the waste water having high salinity, sulfate, chromaticity and COD as well as higher concentration organic matter hard to degraded, the combined system has good treating effect and ensures the finally yielding water to reach the first-grade standard in GB4287-92 pollutant emission standards for textile dyeing and finishing industry.
Description
Technical field
The present invention relates to technical field of waste water processing, particularly relate to a kind of waste water from dyestuff and other high salinity, high-sulfate, high chroma, high COD and contain the Waste Water Treatment of higher concentration hardly degraded organic substance.
Background technology
Since British W.H.Perking in 1857 made first synthetic dyestuff mauvein (e), dyestuffs industries had become one of important industry of fine chemistry industry industry, was bringing into play important effect in the national economy life.Along with the development of dyestuffs industries, waste water from dyestuff has been acknowledged as one of current main pollution source of water body, and environmental issue also becomes the important factor of restriction dyestuff industry development.Waste water from dyestuff not only has specific color, and complex structure, is difficult to break, and biological degradability is low, mostly has genotoxic potential, and returning in environment becomes to depending on a lot of X factors.The kind of dyestuff is various day by day in addition, and the requirement that adapts to market develops towards directions such as anti-photodissociation, anti-oxidant, antibiont degradeds, causes the intractability of waste water from dyestuff also to strengthen gradually.
In general, waste water from dyestuff has high chroma, high COD, supersalinity, low BOD
5" three high one is low " characteristics of/COD, and water quality and quantity changes greatlyyer in time, belongs to more unmanageable organic industrial sewage.According to estimates, nearly 90% inorganic raw material and 10～30% organic raw material are transferred to aqueous phase in the DYE PRODUCTION process, so the waste water from dyestuff complicated component, and the pollution concentration height generally has following characteristics:
(1) the organism overwhelming majority in the waste water be with aromatophores such as benzene, naphthalene, anthracene, quinones as parent, and have the colour developing group, color is darker, colourity can reach 500～500000 times.
(2) basic raw material of DYE PRODUCTION is organism such as benzene series, naphthalene system, anthraquinone system, and product yield is low, and the dyestuff rate of loss is about 2% in the production process, causes in the waste water COD concentration higher, generally can reach 1000～73000mg/L.And the most key be, though partial organic substances can be biochemical in the waste water from dyestuff, BOD
5/ COD ratio is totally lower, and biodegradability is relatively poor, and the some of them material is to microorganism even also have a toxic action.
(3) waste water is acid more, also has to be alkalescence.Owing to adopt the way of saltouing that dye preparations is purified in the DYE PRODUCTION process usually, so generally all contain NaCl, Na in the waste water from dyestuff
2SO
4, Na
2Inorganic salts such as S, and saltiness is bigger.
(4) also contain a considerable amount of suspended particulates, dispersion agent and a small amount of heavy metal ion in the waste water from dyestuff.
(5) because DYE PRODUCTION technology has characteristics such as wide in variety, long flow path, variation are many, the water quality of waste water and water yield fluctuation are all bigger.
The treatment process of waste water from dyestuff mainly contains: biological treatment, chemical oxidation, photochemical catalysis, membrane sepn, electrochemistry, chemical flocculation, adsorption decoloring method etc.But because the dyestuffs industries factory effluent has the characteristics of " three high is low ", of a great variety, the water quality and quantity of adding dyestuff change greatly in time, thereby single a kind of technology is difficult to obtain satisfied effect.Handle waste water containing dye at present, it is the associating multilevel processing technology axle center, that combine with physical chemistry or chemical process that treatment process is progressively turning to the anaerobic-aerobic combination treatment, make every effort to replenish, to remedy physical chemistry method and biological method defective separately by the mutual coordination between materialization and the biological method.And the associating multilevel processing technology that present employed physical chemistry or chemical process combine adopts the method for physico-chemical pretreatment and anaerobic-aerobic combined treatment more, the general coagulant sedimentations that adopt of physico-chemical pretreatment more, and the single employing of pre-treatment coagulating sedimentation single method dosage is big, cost is high, does not reach the required pH of follow-up anaerobic treatment, basicity etc.The associating multilevel processing technology that has also has after aerobic treatment and carries out aftertreatment with coagulant sedimentation, and the single employing of aftertreatment coagulating sedimentation single method dosage is big, cost is high, for dye wastewater with high concentration, especially to high salinity, high-sulfate, high chroma, high COD and contain the waste water from dyestuff of higher concentration hardly degraded organic substance, the water outlet after the processing usually can't reach the primary standard in " GB4287-92 textile dyeing and finishing emission of industrial pollutants standard ".
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of dye waste water treatment system, can effectively handle the difficult degradation waste water from dyestuff, reduce running cost, make indexs such as the COD of water outlet and colourity can reach national specified discharge standard simultaneously, solve the unmanageable at home present situation of waste water from dyestuff, and can satisfy that environmental protection standard in the future improves and the requirement of sewage work's upgrading.
Technical scheme of the present invention is as follows:
A kind of dye waste water treatment system, comprise the anaerobic pond and the Aerobic Pond that set gradually, waste water from dyestuff enters Aerobic Pond generation aerobic reaction behind anaerobic pond generation anaerobic reaction, it is characterized in that: also comprise the preceding physico-chemical pretreatment system of anaerobic pond that is arranged on, be arranged on the advanced oxidation treatment system behind the Aerobic Pond, part colourity in the waste water from dyestuff is removed by described physico-chemical pretreatment system, vitriol and COD are so that guarantee the required pH of back segment anaerobic technique efficient stable operation, basicity and suitable sulfate concentration, the intermediate metabolites that produces in remaining colourity and hardly degraded organic substance and the biological treatment process in the described advanced oxidation treatment system removal outputted aerobic water.
Described physico-chemical pretreatment system comprises and is communicated with interior electrolyzer, the preceding coagulative precipitation tank that is provided with in turn, electrolyzer is loaded iron plane flower and coke according to a certain percentage in described, and a part of colourity and COD were removed in electrolytic reaction in electrolyzer took place in pending waste water from dyestuff entered; Described iron plane flower is to constitute macroscopical electrode with described coke by the body material of interior electrolytic reaction; Coagulative precipitation tank adds saturated limewater adjusting pH value and adds flocculation agent, coagulant aids after introducing described interior electrolyzer water outlet before described, and coagulating sedimentation enters anaerobic pond after removing most vitriol, colourity and COD.
Described advanced oxidation treatment system comprises interior electrolyzer, oxidation pond, the back coagulative precipitation tank that is communicated with setting in turn, electrolyzer is loaded iron plane flower and gac according to a certain percentage in described, the interior electrolytic reaction of interior electrolyzer generation is introduced in the Aerobic Pond water outlet removed a part of colourity and COD, described iron plane flower is to constitute macroscopical electrode with described gac by the body material of interior electrolytic reaction; Interior electrolyzer water outlet enters described oxidation pond and replenishes proper amount of oxidant, removes colourity and COD by oxidation, precipitating action; The oxidation pond water outlet enters the back coagulative precipitation tank and adds saturated limewater and regulate pH value water outlet qualified discharge to neutrality, the coagulating sedimentation.
Described iron plane flower and the filling of coke volume be than being 2: 1, and the colored and gac volume filling of described iron plane is than being 2: 1, makes gas-water ratio remain on 10 by pneumatic blending during electrolytic reaction in electrolyzer carries out in described: 1-20: 1; Preceding coagulative precipitation tank in the described physico-chemical pretreatment system also adds polymerize aluminum chloride and polyacrylamide, and the enhanced coagulation precipitation is removed most of colourity and COD in the waste water; Also add polyacrylamide enhanced coagulation precipitation in the back coagulative precipitation tank in the described advanced oxidation system.
Interior electrolyzer in the described advanced oxidation system add useless acid for adjusting pH value to 3-4 in case reach carry out in the optimal ph of electrolytic reaction; Carried out described interior electrolytic reaction 1-2 hour.
Described oxygenant is 30% hydrogen peroxide, and the hydrogen peroxide dosage is 1-2ml/L, reacts 2-3 hour, adds saturated limewater adjusting pH value and added the polyacrylamide precipitation again 1-2 hour to neutrality.
Described anaerobic pond adopts upflow anaerobic sludge blanket process, and inoculation anaerobic grain sludge, carry out 4-6 month anaerobion domestication, and add engineering bacteria and eliminate in the waste water ammonia nitrogen and sulfide the influence of methanogen is removed colourity through the anaerobion degraded and also made the anaerobism effluent quality help the degraded of aerobic microbiological more.
The used carrier of described Aerobic Pond be can fixation of microbe the urethane carrier, microbe inoculation is the similar waste water active sludge of pending waste water from dyestuff, and adds engineering bacteria and carry out biochemical intensive treatment, the required dissolved oxygen of aerobic reaction is 3-5mg/L.
Between coagulative precipitation tank and the anaerobic pond dosing chamber is set before described, temperature is heated to 25 ℃-40 ℃ and adjust the pH value to 6.5-7.0 in described dosing chamber, enters anaerobic pond after replenishing an amount of trace element according to the water quality situation again.
Also comprise gas blower and sludge thickener, described gas blower is connected with interior electrolyzer, interior electrolyzer and the Aerobic Pond in the advanced oxidation treatment system in the physico-chemical pretreatment system respectively; Described sludge thickener is connected with anaerobic pond with preceding coagulative precipitation tank, back coagulative precipitation tank respectively, after the precipitating sludge that produces in coagulative precipitation tank, back coagulative precipitation tank and the anaerobic pond before described concentrates, be pressed into the mud cake outward transport through plate-and-frame filter press in described sludge thickener.
Technique effect of the present invention is:
The present invention comes dye wastewater treatment using with the combined system of the physico-chemical pretreatment system that sets gradually, anaerobic pond, Aerobic Pond, advanced oxidation system, remove most colourity, vitriol and COD by the pre-treatment of physico-chemical pretreatment system hardening, guarantee required pH, basicity and the suitable sulfate concentration of back segment anaerobic technique efficient stable operation, reduce operating cost for back end processing; By the advanced oxidation system carry out advanced treatment in case finally remove the difficult degradation pollutent of wastewater treatment end and biological treatment process in the intermediate metabolites that produces.Advanced oxidation processes produces hydroxyl radical free radical (OH) by reaction, and utilizing the strong oxidation capacity of OH can be nontoxic material with oxidation operation, even directly with inorganicization of organism, is oxidized to CO
2And H
2O reaches the purpose that alleviates or eliminate water pollution.This combination process is for waste water from dyestuff, especially high salinity, high-sulfate, high chroma, high COD and contain the waste water of higher concentration hardly degraded organic substance, has good treatment effect, final outflow water can reach the primary standard in " GB4287-92 textile dyeing and finishing emission of industrial pollutants standard ", and because COD, colourity concentration in the technology water outlet are very low, make up the proper depth treatment process on this basis, water outlet can be satisfied the water quality requirement of associated cyclic water coolant or reuse water, realize waste water reclaiming, reach the purpose that industry energy conservation reduces discharging.
Advanced oxidation of the present invention system adopts multiple-stage treatment, comprises interior electrolyzer, oxidation pond and back coagulative precipitation tank.Interior electrolyzer under acidic conditions in electrolytic reaction can produce the Fe of capacity
2+, can save FeSO in the Fenton reagent
4Add, greatly reduce running cost.Produce a certain amount of Fe at interior electrolyzer
2+Form strong oxidation system--Fenton reagent with the oxygenant that adds at oxidation pond, can improve removal effect, guarantee discharged wastewater met the national standard, and can satisfy the requirement of environmental protection standard raising in the future sewage work's upgrading to hardly degraded organic substance and colourity.The oxygenant that adopts among the present invention is 30% hydrogen peroxide, hydrogen peroxide (H
2O
2) at Fe
2+Katalysis produce down a large amount of hydroxyl radical free radicals (OH), OH is as a kind of strong oxidizer, organism that can the multiple difficult degradation of oxidation is converted into CO
2And H
2O can not produce secondary pollution (as Cl
2Or NaClO handles waste water and easily produces haloform class by product (THMs), causes secondary pollution).
The physico-chemical pretreatment system adopts multistage pre-treatment, electrolyzer and preceding coagulative precipitation tank in comprising, can be good at reducing the colourity and the COD of dye wastewater with high concentration at interior electrolyzer, improve the biodegradability of waste water simultaneously, is that better condition is created in follow-up biological treatment.Add saturated limewater at preceding coagulative precipitation tank, the Fe that electrolysis produces in making on the one hand
2+And Fe
3+Under alkaline condition, form efficient flocculant, the colourity and the COD of waste water removed, on the other hand the Ca in the liming
2+With the SO in the waste water
4 2-Form calcium sulfate precipitation, greatly reduce sulfate concentration in the former water, help the raising of anaerobic treatment effect and treatment capacity; In addition, calcium hydroxide itself also is a kind of inorganic flocculating agent, can remove the colourity and the COD of waste water effectively.According to the waste water quality situation, optionally add polymerize aluminum chloride and polyacrylamide, waste water is carried out the enhanced coagulation precipitation, reduce the load of follow-up biochemical processing unit, reduce the running cost of biochemical treatment.
Adopt ventilation recoil automatically in the interior electrolysis treatment process during physico-chemical pretreatment and advanced oxidation are handled, promptly adopt pneumatic blending, gas-water ratio is 10: 1-20: 1, the settling that reaction generates in the electrolyzer in can making like this can be flushed away timely and effectively, eliminates the factor and the hidden danger that produce the iron filings caking.Because the iron filings surface deposits is flushed away at any time, thereby make its surface and waste water keep excellent contact, can greatly improve electrode reaction.
Anaerobic pond adopts upflow anaerobic sludge blanket process, inner inoculation anaerobic grain sludge, and add engineering bacteria and eliminate in the waste water ammonia nitrogen and sulfide the influence of methanogen, chemistry, the biological respinse of a series of complexity takes place in the process anaerobion, removes colourity and also makes the anaerobism effluent quality help the degraded of aerobic microbiological more.Biogas and mud that anaerobism produces separate through triphase separator.Waste water from dyestuff under anaerobic opens the two keys of azo by the effect of azo reductase, can finish most decolorization and partial C OD degradation process.
The used carrier of Aerobic Pond be can fixation of microbe the urethane carrier, immobilized microorganism technique is with chemistry or physical means the free microorganism activity to be defined in certain area of space, and make it keep method active, that recycle, compare with free microorganism, immobilized microorganism demonstrates advantages such as microbe density height, speed of response are fast, microorganism is run off less, product separates easily, reaction process control is easier to significantly.The carrier of fixation of microbe has characteristics such as reactivity, wetting ability, permeability, high-specific surface area, and has space cantilever and network cross-linked structure, can form valence link and combine with microorganism, enzyme, and carrier and microorganism are combined closely and can reduce the microorganism number of dropouts.Solid support material has amino, carboxyl, epoxy group(ing) isoreactivity group, has satisfactory stability and physical and chemical performance in sewage, and its voidage is more than 96%, and the density behind the immobilized microorganism approaches the density of water, so be suspension in water.Therefore contaminant degradation speed is fast, strong shock resistance, processing efficiency height, system stability and good denitrogenation and dephosphorization effect.Microbe inoculation is the similar waste water active sludge of pending waste water from dyestuff, adds engineering bacteria and carries out biochemical intensive treatment, adopts this efficient special microorganism, and is fast to organic matter degradation speed, ammonia nitrogen removal efficient height.
Description of drawings
Fig. 1 is a dye waste water treatment system synoptic diagram of the present invention;
Fig. 2 is the detailed maps of Fig. 1.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing.Fig. 1 is a dye waste water treatment system synoptic diagram of the present invention, and Fig. 2 is the detailed maps of Fig. 1.
The invention provides a kind of dye waste water treatment system, as shown in Figure 1, be communicated with in turn in the physico-chemical pretreatment system+anaerobic pond+Aerobic Pond+advanced oxidation treatment system that is provided with, adopting the combination process (hereinafter to be referred as the PUBA combination process) of " physico-chemical pretreatment+anaerobism+aerobic+advanced oxidation " to come dye wastewater treatment using.As shown in Figure 2, the physico-chemical pretreatment system comprises interior electrolyzer, the preceding coagulative precipitation tank that is communicated with setting in turn, and the advanced oxidation treatment system comprises interior electrolyzer, oxidation pond, the back coagulative precipitation tank that is communicated with setting in turn.
In the P section physico-chemical pretreatment stage, electrolysis in adopting, adjusting pH and coagulation-settlement process, make in the waste water most colourity, vitriol and COD obtain removing, guaranteed required pH, basicity and the suitable sulfate concentration of back segment anaerobic technique efficient stable operation.In the electrolytic reaction pond, adopt the body material of waste and old iron plane flower as reaction in pending waste water from dyestuff introduced, constitute macroscopical electrode with coke, iron plane flower and coke volume load than being 2: 1.The settling that generates for reaction in the electrolyzer in making can be flushed away timely and effectively, eliminates the factor and the hidden danger that produce the iron filings caking, adopts ventilation recoil automatically in treating processes, and gas-water ratio is 10: 1-20: 1.Because the iron filings surface deposits is flushed away at any time, make its surface and waste water keep excellent contact, can greatly improve electrode reaction.In interior electrolytic reaction pond, can reach 25-30%, color removal 40-50% to the removal efficient of COD.Introduce preceding coagulative precipitation tank through the later water outlet of interior electrolytic reaction, add saturated limewater and regulate pH, remove most vitriol in the waste water, add polymerize aluminum chloride and polyacrylamide simultaneously, the enhanced coagulation precipitation is removed most of colourity and COD in the waste water.In the coagulating sedimentation step, COD is removed efficient and can reach 50-60%, color removal 60-65%, vitriol is removed 50-55%.
In U section anaerobic treatment stage, anaerobic reactor adopts upflow anaerobic sludge blanket process UASB, and mainly colourity and the COD to waste water handles.Water inlet pH is controlled at 6.5-7.0, temperature about 30 ℃, according to the water quality situation, enters anaerobic pond behind the additional an amount of trace element and carries out anaerobic reaction.Through the anaerobion domestication of some months, finally the clearance to colourity can reach more than 80%, also makes the anaerobism effluent quality help the degraded of aerobic microbiological more simultaneously.Inoculation anaerobic grain sludge in the UASB reactor, and add engineering bacteria B120, ammonia nitrogen and sulfide are to the influence of methanogen in the elimination waste water, and the original strain of engineering bacteria is provided by the BIO-SYSTEMS company of the U.S..
In the B section aerobic treatment stage, adopt immobilized microorganism-BAF G-BAF, remove most ammonia nitrogen and COD in the waste water, dissolved oxygen is 3-5mg/L, the COD clearance is 45-50%.G-BAF adopts immobilized microorganism technique, used efficient suspension macropore carrier (CN2004100625771), microbe inoculation is similar waste water active sludge, and adds engineering bacteria and carry out biochemical intensive treatment, and the original strain of engineering bacteria is provided by the BIO-SYSTEMS company of the U.S..Add the high-effective microorganism carrier of the 30-60% that accounts for the aeration tank useful volume in the G-BAF reactor, the special efficacy microorganism adheres in large quantities and fixes on it, and the G-BAF reactor is actually the twin thing reactor of comprehensive traditional activated sludge process and biomembrance process advantage.In the G-BAF reactors at different levels,, improve the degradation effect of target contaminant by cultivating different special efficacy bacterial classifications; The biomass that surfaces of carrier materials is grown is generally 18-25g/L, be common biomembrance process 1.5-2.0 doubly, be traditional activated sludge process 10-20 doubly, and microorganism combines with carrier firmly, difficult drop-off, be difficult for running off, the biomass of high capacity has guaranteed the efficient and stable of G-BAF reactor removal pollutent; Carrier inside exists good anaerobic zone microenvironment in the operational process, make the numerous miniature denitrification reactor of its inner formation, ammonia oxidation, nitrification and denitrification combined action take place in the middle of same reactor simultaneously, strong assurance the efficient removal of ammonia nitrogen; By controlling the operating parameter of G-BAF reactors at different levels, cause the existence of the aerobic and anaerobic environment of macroscopic view, help releasing phosphorus and excessively taking the photograph phosphorus of polyP bacteria, guaranteed the removal of phosphorus.G-BAF technology core processing structures are BAF, and the pond body is the sheet water flow mode of pressure reduction turnover plate type in form, can be designed to circle or rectangle according to practical situation, and aeration mode is an aeration at the bottom of the air blast pond.The G-BAF pond partly is made up of pond body, high-effective microorganism carrier, interception net and aerator etc.Immobilized microorganism-BAF (G-BAF) carrier that technology adopted is a kind of high molecular synthetic material with netted macroporous structure, have characteristics such as reactivity, wetting ability, permeability, high-specific surface area, and have space cantilever and network cross-linked structure, can form valence link and combine with microorganism, enzyme.G-BAF technology also has the advantage of stable effluent quality under the high loading water inlet, and pollutant removal amount and clearance all increase with the raising of influent concentration, shows G-BAF and adapts to the ability of handling high-concentration waste water, and its special advantages is especially arranged aspect denitrogenation.Therefore, adopt G-BAF technology that the device volume is significantly reduced, reduce the soil occupied area, reduce construction costs.
The treatment stage of A section advanced oxidation, effectively remove colourity and hardly degraded organic substance in the waste water, by regulating wastewater pH, after electrolytic reaction in the electrolyzer generation in the aeration, replenish proper amount of oxidant, by oxidation, precipitating action, effectively remove colourity and hardly degraded organic substance (comprising the intermediate metabolites that produces in the biological treatment process) in the waste water.Enter the interior electrolyzer at rear portion behind the Aerobic Pond water outlet adding spent acid adjusting pH to 3-4, stopped 1-2 hour.Adopt the body material of waste and old iron plane flower as reaction at interior electrolyzer, add gac and constitute macroscopical electrode, iron plane flower and gac volume load than being 2: 1.The settling that generates for reaction in the electrolyzer in making can be flushed away timely and effectively, eliminates the factor and the hidden danger that produce the iron filings caking, adopts ventilation recoil automatically in treating processes, promptly adopts pneumatic blending, and gas-water ratio is 10: 1-20: 1.Because the iron filings surface deposits is flushed away at any time, make its surface and waste water keep excellent contact, can greatly improve electrode reaction.By interior electrolytic reaction, further remove the COD and the colourity of waste water, simultaneously interior electrolytic reaction can also produce a certain amount of Fe2+ ion, forms strong oxidation system--Fenton reagent with the hydrogen peroxide of follow-up interpolation.Interior electrolyzer water outlet adds 30% hydrogen peroxide 1-2ml/L after entering oxidation pond, react after 2-3 hour, enter back coagulative precipitation tank adding saturated limewater and regulate pH, add coagulant aids (polyacrylamide) back after precipitating 1-2 hour in the settling tank, the water outlet qualified discharge to neutral.COD is 500mg/L when Aerobic Pond BAF water outlet, pH is 7.5, when colourity is 600 times, by adding the sulfur waste acid for adjusting pH to 3-4, stopped 2 hours by interior electrolytic reaction, 30% hydrogen peroxide dosage is 2ml/L afterwards, reacted 2 hours, precipitate after 2 hours, water outlet COD is less than 70mg/L, and colourity is less than 20 times.
Between preceding coagulative precipitation tank and anaerobic pond, dosing chamber can be set preferably, in dosing chamber heating and regulate the pH value to follow-up anaerobic treatment stage required temperature and pH value, adjusting the pH value is that 6.5-7.0, temperature are 25 ℃-40 ℃, and according to entering UASB behind the additional an amount of trace element of water quality situation anaerobic reaction takes place.
Dye waste water treatment system also comprises gas blower and sludge thickener, and gas blower is connected with interior electrolyzer, interior electrolyzer and the Aerobic Pond in the advanced oxidation processes in the physico-chemical pretreatment technology respectively; Sludge thickener is connected with anaerobic pond with preceding coagulative precipitation tank, back coagulative precipitation tank respectively, after the precipitating sludge that produces in preceding coagulative precipitation tank, back coagulative precipitation tank and the anaerobic pond concentrates in sludge thickener, is pressed into the mud cake outward transport through plate-and-frame filter press.
Purposes of the present invention is not only applicable to the upgrading of dye wastewater treatment and existing sewage treatment project, and is applicable to other high salinity, high-sulfate, high chroma, high COD and contains the wastewater treatment of higher concentration hardly degraded organic substance.
Enumerate two examples below the present invention is further specified, but the present invention is not limited to this two examples.
Adopt the PUBA combination process that certain dye chemical industry factory waste water is carried out lab scale research.The COD of waste water, total salinity, vitriol and colourity are respectively 5000-6000mg/L, 90000-100000mg/L, 10000-12000mg/L and 35000-40000 doubly.Because former salinity water is too high, through after the suitable dilution, enter the pretreatment technology unit after, COD, vitriol and colourity are reduced to 1000-1500mg/L, 800-1000mg/L and 4000-5000 respectively doubly.Through anaerobic treatment, the residence time was made as 20 hours, and water outlet COD and colourity are respectively 600-800mg/L and 400-500 doubly.The anaerobism water outlet enters the BAF reaction column, and the residence time is 8 hours, and water outlet COD and colourity are respectively 300-350mg/L and 200-250 doubly.Outputted aerobic water enters the advanced oxidation processes section, by adding acid for adjusting pH to 3-4, stops 1 hour by interior electrolytic reaction, and 30% hydrogen peroxide dosage is 1ml/L afterwards, reacts 2 hours, and COD is less than 50mg/L in the post precipitation water outlet, and colourity is less than 10 times.Wherein anaerobic reactor is inoculated certain W-Gum factory anaerobic grain sludge, cultivates 2 months to the bacterial classification maturation, and decolorizing efficiency reaches 80%.BAF add engineering bacteria (350M and 110 two kinds) carry out biological reinforced, to improve removal efficient to hardly degraded organic substance.
Certain dye chemical industry factory, main products is dyestuff intermediate DSD acid.Mainly contain band nitro, amino and sulfonic aromatic organic compounds in the waste water, belong to the high concentrated organic wastewater of difficult degradation, concrete water quality analysis is as shown in table 1.
The table 1 influent quality water yield
| Sequence number | Project | Influent quality | Unit |
| ??1 | The water yield | ??500 | ??m 3/d |
| ??2 | ??COD Cr | ??6865.3 | ??mg/L |
| ??3 | Salinity | ??65772.5 | ??mg/L |
| ??4 | ??SO 4 2- | ??26323.5 | ??mg/L |
| ??5 | Colourity | ??50000 | |
| ??6 | ??pH | ??3 |
Adopt the described PUBA combination process of specification sheets, this waste water from dyestuff is handled, day output is 500m
3/ d.Wherein the UASB reactor and the BAF pond residence time were respectively 24 hours and 12 hours, and seed sludge comes from Shandong W-Gum factory anaerobic grain sludge and and dye processing plant, Henan active sludge respectively.Engineering examination up to standard is so far with steady running more than 1 year, and whole combination process has been obtained the stable treated effect, and the treatment effect of each technique unit is as shown in table 2.
Table 2 main technique unit water quality (unit: mg/L, colourity does not have unit)
By above-mentioned example as can be seen, no matter be that lab scale experiment or engineering are used, the present invention is for waste water from dyestuff, especially high salinity, high-sulfate, high chroma, high COD and contain the waste water of higher concentration hardly degraded organic substance, have good treatment effect, final outflow water can reach the primary standard in " GB4287-92 textile dyeing and finishing emission of industrial pollutants standard ".And, because COD, the colourity concentration of the water outlet of PUBA technology are very low, make up proper depth treatment process (as reverse osmosis desalination etc.) on this basis, water outlet can be satisfied the water quality requirement of associated cyclic water coolant or reuse water fully, realize waste water reclaiming, reach the purpose that industry energy conservation reduces discharging.
The above only is a preferred implementation of the present invention, and other modification and the improvement for making according to essence of the present invention all will fall into protection scope of the present invention.
Claims (10)
1. dye waste water treatment system, comprise the anaerobic pond and the Aerobic Pond that set gradually, waste water from dyestuff enters Aerobic Pond generation aerobic reaction behind anaerobic pond generation anaerobic reaction, it is characterized in that: also comprise the preceding physico-chemical pretreatment system of anaerobic pond that is arranged on, be arranged on the advanced oxidation treatment system behind the Aerobic Pond, part colourity in the waste water from dyestuff is removed by described physico-chemical pretreatment system, vitriol and COD are so that guarantee the required pH of back segment anaerobic technique efficient stable operation, basicity and suitable sulfate concentration, the intermediate metabolites that produces in remaining colourity and hardly degraded organic substance and the biological treatment process in the described advanced oxidation treatment system removal outputted aerobic water.
2. dye waste water treatment system according to claim 1, it is characterized in that: described physico-chemical pretreatment system comprises and is communicated with interior electrolyzer, the preceding coagulative precipitation tank that is provided with in turn, electrolyzer is loaded iron plane flower and coke according to a certain percentage in described, and a part of colourity and COD were removed in electrolytic reaction in electrolyzer took place in pending waste water from dyestuff entered; Described iron plane flower is to constitute macroscopical electrode with described coke by the body material of interior electrolytic reaction; Coagulative precipitation tank adds saturated limewater adjusting pH value and adds flocculation agent, coagulant aids after introducing described interior electrolyzer water outlet before described, and coagulating sedimentation enters anaerobic pond after removing most vitriol, colourity and COD.
3. dye waste water treatment system according to claim 1, it is characterized in that: described advanced oxidation treatment system comprises interior electrolyzer, oxidation pond, the back coagulative precipitation tank that is communicated with setting in turn, electrolyzer is loaded iron plane flower and gac according to a certain percentage in described, the interior electrolytic reaction of interior electrolyzer generation is introduced in the Aerobic Pond water outlet removed a part of colourity and COD, described iron plane flower is to constitute macroscopical electrode with described gac by the body material of interior electrolytic reaction; Interior electrolyzer water outlet enters described oxidation pond and replenishes proper amount of oxidant, removes colourity and COD by oxidation, precipitating action; The oxidation pond water outlet enters the back coagulative precipitation tank and adds saturated limewater and regulate pH value water outlet qualified discharge to neutrality, the coagulating sedimentation.
4. according to claim 2 or 3 described dye waste water treatment systems, it is characterized in that: described iron plane flower and coke volume load than being 2: 1, described iron plane flower and gac volume load than being 2: 1, make gas-water ratio remain on 10 by pneumatic blending during electrolytic reaction in electrolyzer carries out in described: 1-20: 1; Preceding coagulative precipitation tank in the described physico-chemical pretreatment system also adds polymerize aluminum chloride and polyacrylamide, and the enhanced coagulation precipitation is removed most of colourity and COD in the waste water; Also add polyacrylamide enhanced coagulation precipitation in the back coagulative precipitation tank in the described advanced oxidation system.
5. dye waste water treatment system according to claim 3 is characterized in that: the interior electrolyzer in the described advanced oxidation system add useless acid for adjusting pH value to 3-4 in case reach carry out in the optimal ph of electrolytic reaction; Carried out described interior electrolytic reaction 1-2 hour.
6. dye waste water treatment system according to claim 3, it is characterized in that: described oxygenant is 30% hydrogen peroxide, the hydrogen peroxide dosage is 1-2ml/L, reacts 2-3 hour, adds saturated limewater adjusting pH value and added the polyacrylamide precipitation again 1-2 hour to neutrality.
7. according to claim 1 or 2 or 3 described dye waste water treatment systems, it is characterized in that: described anaerobic pond adopts upflow anaerobic sludge blanket process, and inoculation anaerobic grain sludge, carry out 4-6 month anaerobion domestication, and add engineering bacteria and eliminate in the waste water ammonia nitrogen and sulfide the influence of methanogen is removed colourity through the anaerobion degraded and also made the anaerobism effluent quality help the degraded of aerobic microbiological more.
8. according to claim 1 or 2 or 3 described dye waste water treatment systems, it is characterized in that: the used carrier of described Aerobic Pond is urethane carrier that can fixation of microbe, microbe inoculation is the similar waste water active sludge of pending waste water from dyestuff, and add engineering bacteria and carry out biochemical intensive treatment, the required dissolved oxygen of aerobic reaction is 3-5mg/L.
9. according to claim 2 or 3 described dye waste water treatment systems, it is characterized in that: between coagulative precipitation tank and the anaerobic pond dosing chamber is set before described, temperature is heated to 25 ℃-40 ℃ and adjust the pH value to 6.5-7.0 in described dosing chamber, enters anaerobic pond after replenishing an amount of trace element according to the water quality situation again.
10. according to the described dye waste water treatment system of one of claim 1 to 9, it is characterized in that: also comprise gas blower and sludge thickener, described gas blower is connected with interior electrolyzer, interior electrolyzer and the Aerobic Pond in the advanced oxidation treatment system in the physico-chemical pretreatment system respectively; Described sludge thickener is connected with anaerobic pond with preceding coagulative precipitation tank, back coagulative precipitation tank respectively, after the precipitating sludge that produces in coagulative precipitation tank, back coagulative precipitation tank and the anaerobic pond before described concentrates, be pressed into the mud cake outward transport through plate-and-frame filter press in described sludge thickener.
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| CN200910092257A CN101659500A (en) | 2009-09-07 | 2009-09-07 | Dye waste water treatment system |
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| CN200910092257A CN101659500A (en) | 2009-09-07 | 2009-09-07 | Dye waste water treatment system |
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| CN102730862A (en) * | 2011-04-01 | 2012-10-17 | 中国石油化工股份有限公司 | Sewage treatment method in synthetic rubber production |
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| CN103570169B (en) * | 2013-11-17 | 2015-12-02 | 遵义市倍缘化工有限责任公司 | The technique of sewage decoloring process |
| CN104891608A (en) * | 2015-05-06 | 2015-09-09 | 贵州安凯达实业股份有限公司 | Method for concentrating horizontal-flow primary sedimentation tank sludge |
| CN104891608B (en) * | 2015-05-06 | 2017-01-25 | 贵州安凯达实业股份有限公司 | Method for concentrating horizontal-flow primary sedimentation tank sludge |
| CN106277554A (en) * | 2015-05-27 | 2017-01-04 | 麦王环境技术股份有限公司 | The process Processes and apparatus of the waste water produced in methacrylic acid and ester production process |
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