CN103508559A - Aerobic treatment method applied in antibiotic wastewater treatment - Google Patents

Aerobic treatment method applied in antibiotic wastewater treatment Download PDF

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CN103508559A
CN103508559A CN201310452913.2A CN201310452913A CN103508559A CN 103508559 A CN103508559 A CN 103508559A CN 201310452913 A CN201310452913 A CN 201310452913A CN 103508559 A CN103508559 A CN 103508559A
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姚武松
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PUCHENG CHIA TAI BIOCHEMISTRY CO Ltd
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Abstract

The invention discloses an aerobic treatment method applied in antibiotic wastewater treatment, and applied in a wastewater treatment A/0 biochemical system. The A/0 biochemical system comprises a pool A, a pool O, a reflowing device and a biological setting pond. A preposed efficient microorganism A/O denitrification system is established in an aerobic interior of the biochemical system; an aerobic hydrolysis pool (the pool A) and an aeration oxidization pool (the pool O) are built in a biochemical pool, and are filled with efficient microbial preparation; the optimal environment is created to continuously enlarge cultivation and domestication. The removal of ammonia nitrogen and total nitrogen is mainly implemented in a continuous flow treatment manner with the methods of strengthening the stirring of the pool A and the aeration of the pool O and controlling the reflowing of nitration liquid and the sludge return ratio, and most COD is simultaneously degraded, so that the purpose of degrading various pollutants is achieved; through the technology, the removal efficiency of various pollutants is more than 95%.

Description

A kind of aerobic treatment method that is applied to antibiotic waste water improvement
Technical field
The present invention relates to Industrial Wastewater Treatment field, more particularly, relate to the aerobic treatment method of the high ammonia nitrogen of a kind of antibiotics, high organic waste water.
Background technology
Antibiotic waste water is more unmanageable a kind of in trade effluent.This waste water complicated component, organic concentration is high, solvability and colloidality solids concn are high, pH value often changes, and temperature is higher, with color and smell, suspension content is high, easily produce foam, contain hard-degraded substance and have the toxicants such as inhibiting microbiotic, belong to antibiotics used water difficult to degradate.Ke Shengization≤0.3 of considering such waste water, B/C is than high, and biodegradability is strong, and the most energy-conservation effective treatment process adopts microbiological treatment technology exactly, i.e. anaerobism+aerobic bioremediation.
High density antibiotics organic waste water is through coagulating sedimentation+acidication+EGSB anaerobic biological treatment Hou,Qi BOD of contamination index, COD, SS, NH 3-N concentration is still very high, BOD=1000-1500mg/l, COD=3000-4000mg/l, ammonia nitrogen=600-800mg/l, SS=400-500mg/l, can not meet emission request far away, and also must carry out aerobe processing is A/O Wastewater Treated by Activated Sludge Process, decomposition by high-effective microorganism to organic pollutant, guarantees the elimination that can further be degraded of dirty water pollutant.
The embrane methods such as traditional aerobe is processed generally the mud methods such as traditional A/O method, SBR method, oxidation ditch process method and MBR method, contact oxidation method, but because of ammonia nitrogen too high, nitration reaction and denitrification process are not thorough, cause ammonia nitrogen hard degradation, simultaneously the vying each other of autotroph and heterotroph microorganism, survival of the fittest effect, make resultful microorganism dominant microflora be difficult to control, effluent index is fluctuated, has had a strong impact on the normal operation of Sewage treatment systems.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of aerobic treatment method that antibiotic waste water is administered that is applied to, and carries out the removal of ammonia nitrogen and total nitrogen, and the COD that degrades in large quantities reaches the object of each pollutant of degraded simultaneously.
For solving the problems of the technologies described above, the present invention adopts following scheme to realize:
The aerobic treatment method that antibiotic waste water is administered, is applied to wastewater treatment A/O biochemical system, and this A/O biochemical system comprises A pond, O pond, reflux and biogenic sediment pond, it is characterized in that, this treatment process comprises the following steps:
(1) set up concurrent oxidation and aquoiysis pond: in A pond, add and take denitrifying bacterium as main high-efficiency microorganism preparation, and add ball type carrier in A pond, and make denitrifying bacterium attached thereto, be suspended in pond, strengthen stirring intensity simultaneously, in anaerobic environment, cultivate and tame;
(2) set up aeration oxidation pond: in O pond, add that to take autotrophic type microorganism and heterotroph microorganism be main high-efficiency microorganism preparation, and add Powdered Activated Carbon as carrier in O pond;
(3) by anaerobic effluent with without the former water of anaerobic treatment, first collect preparing pool, according to the quality of anaerobic treatment ability and effect, by the allotment of system recirculation water, to reasonable COD, ammonia nitrogen, deployed waste water enters the A pond of A/O biochemical system and carries out denitrification denitrogenation;
(4) in A pond, usining organism in waste water, as carbon source, carries out high strength stirring, carries out anti-nitration reaction, and nitrate and nitrite are converted into nitrogen under denitrifying bacteria effect;
(5) water outlet of A pond enters O pond, in O pond, by micropore gas explosion, provide enough oxygen, DO is 3.0-5.0mg/l, by adding alkali lye, maintain PH in 7.0-7.5 scope simultaneously, heterotrophic microorganism take organic pollutant as nutrition source to organic pollutant degrade, autotrophic type microorganism carries out nitration reaction, 80% of O pond outlet water at tail end is back to A pond by reflux and carries out denitrification denitrogenation;
(6) nitrification liquid that is back to A pond carries out denitrification under anoxia condition, and nitrate and nitrite change into nitrogen under denitrifying bacteria effect;
(7) water outlet of A/O system precipitates to biogenic sediment pond, the high-effective microorganism precipitating adds to A/O system by mud return line, microorganism just aging and that die enters sludge disposal system as excess sludge, supernatant liquor overflow penetration depth governing system simultaneously;
In aforesaid method, for guaranteeing the dynamic stability balance of high-effective microorganism in O pond, the former water flooding quantity of returned sluge and O pond ratio is 1:1, and within 5 ~ 6 days, carries out spoil disposal, and SV30 is 30% ~ 50%.
Wherein, O pond wastewater temperature remains on 20 ~ 30 ℃, and SVI is 100; A pond nitrification liquid reflux ratio is 4:1, and biogenic sediment pond mud age is 5 ~ 6 days.
Wherein, at ball type carrier described in step (1), be ¢ 8cm, carrier inside is acrylic fibers or sponge.
Wherein, at the alkali lye that drops into O pond described in step (5), be that concentration is 30% NaOH.
Beneficial effect:
The present invention is by setting up the preposition A/O denitrification system of high-effective microorganism in the aerobic inside of biochemical system, at biochemistry pool, set up concurrent oxidation and aquoiysis pond (A pond) and aeration oxidation pond (O pond), add therein high-efficiency microorganism preparation, and create the continuous enlarged culturing of optimum environment and domestication.By the stirring of strengthening A pond, O pond aeration, control the means such as nitrification liquid backflow and return sludge ratio, with Continuous Flow processing mode, move, mainly carry out the removal of ammonia nitrogen and total nitrogen, COD degrades in large quantities, the object that reaches each pollutant of degraded, by this technique, all kinds of contaminant removal efficiency are up to more than 95%.
Accompanying drawing explanation
Fig. 1 is in A/O biochemical system structural representation in the present invention.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Please refer to Fig. 1, is the A/O biochemical system of antibiotic waste water aerobic treatment method application of the present invention, and this system comprises A pond, O pond, reflux, biogenic sediment pond.
Antibiotic waste water aerobic treatment method, is applied to wastewater treatment A/O biochemical system, and this A/O biochemical system comprises A pond, O pond, reflux and biogenic sediment pond, and this treatment process comprises the following steps:
(1) set up concurrent oxidation and aquoiysis pond: in A pond, add and take denitrifying bacterium as main high-efficiency microorganism preparation, and add ball type carrier in A pond, and make denitrifying bacterium attached thereto, be suspended in pond, strengthen stirring intensity simultaneously, in anaerobic environment, cultivate and tame, in this step, this carrier is diameter 8cm hollow ball, surrounding perforation, material is polyethylene, the inside is full of for acrylic fibers or sponge, high-effective microorganism adheres within it, form microbial film, density reaches 0.95-0.98kg/L, be suspended in A pond, pass through mechanical stirring, there is short-cut denitrification in high-effective microorganism simultaneously, different from O pond gac, O pond absorbent charcoal carrier is a kind of Powdered wooden carbon, granularity is 0.1mm, solid molecule, density is 1.01-1.1kg/L, the main microorganism flock degree of compactness that improves, accelerate mud-water separation, strengthen high-effective microorganism settling velocity, reducing high-effective microorganism runs off, hold back high-effective microorganism, the possibility that simultaneously suppresses the outburst of thread fungus big area,
(2) set up aeration oxidation pond: in O pond, add that to take autotrophic type microorganism and heterotroph microorganism be main high-efficiency microorganism preparation, and add Powdered Activated Carbon as carrier in O pond;
(3) by anaerobic effluent with without the former water of anaerobic treatment, first collect preparing pool, according to the quality of anaerobic treatment ability and effect, by (COD≤4000mg/l within the scope of system recirculation water (being aerobic system water outlet (A/O processes the water outlet of artifact precipitation)) the extremely reasonable COD of allotment, ammonia nitrogen, ammonia nitrogen≤500mg/l), object is to meet aerobic microbiological metabolism requirement, be unlikely to the too high toxicant that becomes of concentration, be COD≤4000mg/l, ammonia nitrogen≤500mg/l), denitrification denitrogenation is carried out in the A pond that deployed waste water enters A/O biochemical system; Here, because of the limitation of highly effective aerobic microorganism, it is COD≤4000mg/l that COD, ammonia nitrogen must be controlled in certain scope, ammonia nitrogen≤500mg/l, if too high, must dilute, if too low, must meet C(BOD), the ratio of N, P is: 100:5:1;
(4) in A pond, usining organism in waste water, as carbon source, carries out high strength stirring, carries out anti-nitration reaction, and nitrate and nitrite are converted into nitrogen under denitrifying bacteria effect;
(5) water outlet of A pond enters O pond, in O pond, by micropore gas explosion, provide enough oxygen, DO is 3.0-5.0mg/l, by adding alkali lye, maintain PH in 7.0-7.5 scope simultaneously, heterotrophic microorganism take organic pollutant as nutrition source to organic pollutant degrade, autotrophic type microorganism carries out nitration reaction, O pond outlet water at tail end most of (general 80% left and right) is back to A pond by reflux and carries out denitrification denitrogenation;
(6) nitrification liquid that is back to A pond carries out denitrification under anoxia condition, and nitrate and nitrite change into nitrogen under denitrifying bacteria effect;
(7) water outlet of A/O system precipitates to biogenic sediment pond, the high-effective microorganism precipitating adds to A/O system by mud return line, microorganism just aging and that die enters sludge disposal system as excess sludge, supernatant liquor overflow penetration depth governing system simultaneously;
In aforesaid method, for guaranteeing the dynamic stability balance of high-effective microorganism in O pond, returned sluge and flooding quantity ratio are 1:1, and within 5 ~ 6 days, carry out spoil disposal, SV30 is 30% ~ 50%, and SV30 is sludge settling ratio (aerobic system technical indicator) here, i.e. 30 minutes shared volume ratios of mud of sedimentation.
Core processing technology of the present invention is cultivation and the domestication of high-effective microorganism, inoculation efficient microbial strain, cultivate and tame, in the culturing process of O pond, add Powdered Activated Carbon as carrier, this carrier object is for improving microorganism flock degree of compactness, accelerate mud-water separation, reducing microorganism runs off, the possibility that simultaneously suppresses the outburst of thread fungus big area, completely different from A pond ball type carrier, A pond carrier is for holding back microorganism, under in A pond, high strength stirs, flco is not broken up, and forms single independent short-cut denitrification simultaneously.
Cultivating the microorganism of having tamed is characterized by:
1, the nontoxicity of high-effective microorganism own, no pathogenicity, can not cause secondary pollution.
2, the equivalent pollutent in removal waste water is than the rate block of conventional microorganism, and ability is strong.Because conventional microorganism is in high COD=4000mg/l, high ammonia nitrogen=500mg/l environment, the pollutent of its degraded substantially because of its concentration too high qualitative be toxicant, affect existence, the metabolism of conventional microorganism, even can cause the various situations such as sludge decomposition, mud floating and sludge bulking, cannot move at all, whole system blackening is smelly, cause collapse, microorganism Large Scale Death, thrashing.
3, degradation of ammonia nitrogen ability is strong, and clearance Gao Keda is more than 95%, and the clearance of total nitrogen can reach 85%.
4, the mud of mud is long age, so excess sludge production is few, be conventional activated sludge 1/10 or still less.
5, sludge settling property is good, and tightness is high, good stability.
6, can select different technique according to different water quality, process choice is flexible, and equipment is simple, hardware facility less investment, and working cost is low, failure rate is low.
7, microorganism is disposable adds, after system debug completes without adding.
8, anti impulsion load is high, can stand the impact of ammonia nitrogen in high density.
A/O system A pond (also crying concurrent oxidation and aquoiysis pond): biochemistry pool fore portion is set up concurrent oxidation and aquoiysis pond (A pond), add therein new and effective microbial preparation, take denitrifying bacterium as main high-efficiency strain, by adjusting its living environment: add novel ball floating stuffing carrier in A pond, this ball type carrier is ¢ 8cm, inside is acrylic fibers or sponge, attached thereto being suspended in pond of high-effective microorganism-------denitrifying bacterium that allows easy loss, strengthen stirring intensity simultaneously, in anaerobic environment, cultivate and tame, can give full play to Degradation, do not cause again flock to break, disintegrate.High-efficiency strain denitrifying bacterium can be held back, guaranteed the stable of A section system simultaneously.Performance denitrifying bacteria shows different specific properties under varying environment, utilizes organism in waste water to carry out denitrification as carbon source, by NO 2--N, NO 3--N changes into N 2from water, remove.By concurrent oxidation and aquoiysis effect, make the larger molecular organics of difficult degradation be decomposed into micromolecular material simultaneously, improve biodegradability, be beneficial to the further degraded of follow-up CODcr;
A/O system O pond (being also aeration oxidation pond): set up aeration oxidation pond (O section) at biochemistry pool rear portion, adding therein new and effective microbial preparation is that autotrophic bacteria and heterotrophic bacterium are main high-effective microorganism, by adjusting high-effective microorganism living environment: the sufficiently long residence time (7d) (be 168h the mud age that is microorganism), take Powdered Activated Carbon as carrier, under sufficient dissolved oxygen and abundant foodstuff (organism), organic pollutant is degraded, there is not sludge bulking, heterotroph microorganism is that aerobic microbiological has under the prerequisite of free oxygen in the inside, O pond, using organic pollutant as nutrition source, organic pollutant is degraded, stable.High-effective microorganism---autotrophic type microorganism carries out nitrification at this, NH simultaneously 3be oxidized to nitrite, be reoxidised into nitrate, performance high-effective microorganism shows different specific properties under varying environment, completes nitrifying process, NH 3-N changes into NO 2--N, NO 3--N decomposing organic matter; In nitrated, remove CODcr.For the high situation of ammonia nitrogen in waste water content, consider that the nitrification liquid in total nitrogen index ,Bao Yang pond and the mud of second pond carry out denitrification with pump reflux to oxygen compatibility pool A pond;
In O pond, a large amount of high-effective microorganisms (SV30=30-50%) are played a great role at this, at the lower a large amount of degraded COD of sufficient dissolved oxygen (DO=3.0-5.0 mg/l), and by nitrifier, nitrogenous substances are converted into nitrate nitrogen and nitrite nitrogen.The oxygen that this process need is a large amount of and basicity.So Ci workshop section must provide enough oxygen by micro-pore aeration) and maintain acid base equilibrium by adding liquid caustic soda as NaOH, PH is maintained 7.0-7.5, and water outlet major part is back to A pond and carries out denitrification denitrogenation.
In O pond, temperature T maintains 20 ~ 30 degrees Celsius, SVI(sludge index, the proportion that 1g dewatered sludge accounts for)=100; In A pond, the ratio of backflow nitrification liquid and flooding quantity is 5:1; In biogenic sediment pond, mud remains on about 5 ~ 6 days age.
Process parameter control: O pond: DO(dissolved oxygen, the content of dirty water oxygen)=3.0-5.0mg/l,, SV30(settling ratio, 30 minutes shared volume ratios of mud of sedimentation)=30-50%, pH(soda acid) be 7.0-7.5, T(temperature)=20-30 ℃, sludge reflux, reflux ratio (returned sluge and flooding quantity) 1:1, A pond: nitrification liquid refluxes, reflux ratio (nitrification liquid and flooding quantity) 4:1, second pond: excess sludge discharge: HRT (mud age) 5-6 days.
A/O system reflux (being also nitrification liquid return-flow system): aeration oxidation pond is that the outlet water at tail end in O pond is back in A pond, concurrent oxidation and aquoiysis pond by this reflux, and object is NO a large amount of in waste water 2--N, NO 3--N gets back in concurrent oxidation and aquoiysis pond and carries out denitrification process, NO 2--N, NO 3--N changes into N 2thereby, remove the nitrogenous substances in waste water, reach the object of denitrogenation; The backflow nitrification liquid denitrification under anoxia condition that is back to A pond from O pond, nitrate and nitrite are converted into nitrogen and overflow into atmosphere denitrogenation under denitrifying bacteria effect, emit a large amount of alkali.In denitrification process, necessary enough carbon sources, organic carbon, guarantees that microorganism has enough nutrition sources, so anaerobic effluent must be introduced into A section, A, in anoxia stirring process, also plays facultative hydrolytic action simultaneously, improve waste water B/C ratio, produce a large amount of basicity, for the degraded of O section provides strong condition.Here B/C is biodegradability index, when BOD/COD is B/C≤0.2 for not biodegradable or compared with difficult for biological degradation, biodegradable during B/C=0.2-0.3, B/C >=0.3 o'clock is readily biodegradable.As a kind of optimal way, in A pond, the reflux ratio of nitrification liquid and flooding quantity is 5:1.
Biogenic sediment pond: the water outlet of A/O pond enters as biological settling tank, in Gai pond, from the mixed solution containing a large amount of high-effective microorganisms in the mixed solution in O pond, at this, precipitate, concentrate, simultaneously, dynamic stability balance in order to ensure high-effective microorganism in O pond, the microorganism precipitating adds to A/O system A section by mud return line, for guaranteeing that A/O system has enough high-effective microorganisms, the ratio 1:1 left and right that returned sluge and flooding quantity must be controlled at, and regular (5-6d) spoil disposal, strictly control SV30(settling ratio) within the scope of 40%-60%.Aging and unnecessary microorganism and residue excess sludge enter sludge disposal system, and supernatant liquor flow into next workshop section.
New antibiotic waste water aerobic treatment process of the present invention, owing to having set up complete biologic chain, so there is the feature of mud age long (more than can reaching 150 h), owing to adopting special high-effective microorganism inoculation, and the A/O system of cultivating and taming can make nitrifier and denitrifying bacteria in biosystem, form dominant bacteria, thereby guarantee that more conventional A/O system has better, denitrification effect more thoroughly, in A pond by submersible agitating and suspension ball type carrier, created top condition, guaranteed that high-effective microorganism denitrifying bacterium forms dominant bacteria, at the bottom of O pond is by micropore, expose to the sun and control dissolved oxygen and Powdered Activated Carbon carrier and prevent that the return sludge ratio of sludge loss and 1:1 from guaranteeing sludge quantity, created top condition, autotrophic type nitrobacteria and heterotroph protozoon have been guaranteed, metazoan wheel animalcule is as thread fungus, campanularian, the running balance of the high-effective microorganisms such as wheel animalcule, the basic all removals of each pollutant that can be degraded by microorganisms, finally realize the clearance of each pollutant up to more than 95%, guarantee to reach national secondary discharge standard, can directly enter into municipal sewage plant, also can carry out deep treatment system simultaneously, do other degree of depth chemical treatment of higher one-level.
Water outlet (COD≤4000mg/l after adopting high-effective microorganism A/O activated sludge process aerobic treatment process of the present invention to process microbiotic anaerobic waste water, An Dan≤500mg/l) process, guaranteed that antibiotic waste water is having a more comprehensive removal effect by aerobic process to pollutent again after anaerobic biological treatment, at aerobe, process workshop section effectively removes pollutent comprehensively, it is that all kinds of contamination indexs are: BOD5≤60mg/l that water outlet discharge reaches national secondary discharge standard, CODcr≤300mg/l, An Dan ≤=50mg/l, SS≤100mg/l, Se Du≤80, pH=6.0-9.0.
These are only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes specification sheets of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (4)

1. be applied to the aerobic treatment method that antibiotic waste water is administered, be applied to wastewater treatment A/O biochemical system, this A/O biochemical system comprises A pond, O pond, reflux and biogenic sediment pond, it is characterized in that, this treatment process comprises the following steps:
(1) set up concurrent oxidation and aquoiysis pond: in A pond, add and take denitrifying bacterium as main high-efficiency microorganism preparation, and add ball type carrier in A pond, and make denitrifying bacterium attached thereto, be suspended in pond, strengthen stirring intensity simultaneously, in anaerobic environment, cultivate and tame;
(2) set up aeration oxidation pond: in O pond, add that to take autotrophic type microorganism and heterotroph microorganism be main high-efficiency microorganism preparation, and add Powdered Activated Carbon as carrier in O pond;
(3) by anaerobic effluent with without the former water of anaerobic treatment, first collect preparing pool, according to the quality of anaerobic treatment ability and effect, by the allotment of system recirculation water, to reasonable COD, ammonia nitrogen, deployed waste water enters the A pond of A/O biochemical system and carries out denitrification denitrogenation;
(4) in A pond, usining organism in waste water, as carbon source, carries out high strength stirring, carries out anti-nitration reaction, and nitrate and nitrite are converted into nitrogen under denitrifying bacteria effect;
(5) water outlet of A pond enters O pond, in O pond, by micropore gas explosion, provide enough oxygen, DO is 3.0-5.0mg/l, by adding alkali lye, maintain PH in 7.0-7.5 scope simultaneously, heterotrophic microorganism take organic pollutant as nutrition source to organic pollutant degrade, autotrophic type microorganism carries out nitration reaction, 80% of O pond outlet water at tail end is back to A pond by reflux and carries out denitrification denitrogenation;
(6) nitrification liquid that is back to A pond carries out denitrification under anoxia condition, and nitrate and nitrite change into nitrogen under denitrifying bacteria effect;
(7) water outlet of A/O system precipitates to biogenic sediment pond, the high-effective microorganism precipitating adds to the O pond of A/O system by mud return line, microorganism just aging and that die enters sludge disposal system as excess sludge, supernatant liquor overflow penetration depth governing system simultaneously;
In aforesaid method, for guaranteeing the dynamic stability balance of high-effective microorganism in O pond, returned sluge is 1:1 with the flooding quantity ratio that enters the former water in O pond, and within 5 ~ 6 days, carries out spoil disposal, and SV30 is 30% ~ 50%.
2. antibiotic waste water aerobic treatment method according to claim 1, is characterized in that, O pond wastewater temperature remains on 20 ~ 30 ℃, and SVI is 100; A pond nitrification liquid reflux ratio is 4:1, and biogenic sediment pond mud age is 5 ~ 6 days.
3. a kind of aerobic treatment method that antibiotic waste water is administered that is applied to according to claim 1, is characterized in that, at ball type carrier described in step (1), is ¢ 8cm, and carrier inside is acrylic fibers or sponge.
4. antibiotic waste water aerobic treatment method according to claim 1, is characterized in that, at the alkali lye that drops into O pond described in step (5), is that concentration is 30% NaOH.
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CN106673306B (en) * 2016-12-23 2020-03-31 内蒙古金河环保科技股份有限公司 Treatment method of high-concentration degradation-resistant ammonia-containing organic wastewater
CN106587353A (en) * 2017-01-18 2017-04-26 许琼琳 System for treating high ammonia nitrogen and organic wastewater through immobilized microorganisms
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CN115231708A (en) * 2022-09-23 2022-10-25 湖南先导洋湖再生水有限公司 Three-dimensional subsurface flow constructed wetland system for regionally reinforcing function of microorganism

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