CN101759295A - High-efficiency nitrifying bacterium culture process for municipal sewage treatment - Google Patents
High-efficiency nitrifying bacterium culture process for municipal sewage treatment Download PDFInfo
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- CN101759295A CN101759295A CN200910219411A CN200910219411A CN101759295A CN 101759295 A CN101759295 A CN 101759295A CN 200910219411 A CN200910219411 A CN 200910219411A CN 200910219411 A CN200910219411 A CN 200910219411A CN 101759295 A CN101759295 A CN 101759295A
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Abstract
The invention discloses a high-efficiency nitrifying bacterium culture process for municipal sewage treatment. In the process, an inverted A/O (anaerobic/oxic) system is adopted to ensure that sludge water to be treated and backflow sludge are mixed and enter an oxic pool provided with an aerating device, and under an oxic condition, ammonia nitrogen in the sludge water to be treated is oxidized into nitrate; a mixed solution after nitration enters an anoxic pool provided with a stirring device; and under an anoxic condition, denitrifying bacteria in the sludge carry out a denitrifying reaction by utilizing per se organic matters in the sludge water and the nitrate generated by the nitratlon reaction of the oxic pool to reduce the nitrate into nitrogen. The process eliminates the inhibition of the high-concentration ammonia nitrogen to nitrifying bacteria, and the growth rate of the nitrifying bacteria is high; the structure of a cultured nitrifying bacterium group in the active sludge is consistent with that of a sewage treatment system and can furthest play roles and take effects; and residual sludge after precipitation is used for the biological addition of a denitrification and dephosphorization system of a municipal sewage treatment plant, thus the process is suitable for the biological intensification of a sludge water treatment and sewage denitrification treatment system of the municipal sewage treatment plant stabilizing sludge by using anaerobic digestion.
Description
Affiliated technical field
The nitrifier population that the present invention relates to the municipal sewage treatment denitrification dephosphorization system is cultivated particularly a kind of high-efficiency nitrifying bacterium culture process that is used for municipal sewage treatment.
Background technology
In the municipal effluent biological denitrification process, in the reaction tank nitrifier content how much determining nitrated ability because nitrifier is an autotrophic bacteria, sludge yield is low, therefore, generally believes that at present nitrated is rate-controlling step in the biological denitrification process.In order to reach nitrification effect preferably, sewage work all controls long sludge age, is generally 10～15 days, and even so, the share of nitrifier is still lower in municipal sewage plant's active sludge at present, accounts for 3～5% of sludge quantity.Therefore, the key that improves municipal sewage plant's biological nitration effect is to improve the concentration of nitrifier in the active sludge, perhaps improves the share of nitrifier in active sludge.
In order to improve the share of nitrifier in active sludge, can adopt the artificial culture nitrifier, be added to Sludge System then.Adopt artificial culture, matrix is crucial.Nitrifier as matrix, obtains to increase the required energy and the required nitrogenous source of synthetic cell material with ammonia.Various compounds that contain ammonia such as ammonium chloride, ammonium sulfate, ammoniacal liquor, urea all can be used as the matrix of artificial culture, but certainly will increase the cost that nitrifier is cultivated like this.
At present, what municipal sewage treatment was generally used is traditional nitrated-denitrification biological denitrogenation method, what adopt is anoxic/aerobic process, it is anoxic denitrification-aerobic nitrification-sedimentary treatment step, the mixed solution of sewage and returned sluge and backflow is mixed into anoxic pond, at this, microorganism in the returned sluge (denitrifying bacteria) utilizes nitrate and the organism in the sewage (COD) in the mixed-liquor return to carry out denitrification, then, enter Aerobic Pond, at this, nitrifier in the mud utilizes the airborne oxygen of supplying with that the ammonia nitrogen in the water is oxidized to nitrate, and after nitration reaction finished, (mixed-liquor return) refluxed in the water part, for the denitrification of anoxic pond provides nitrate (electron acceptor(EA)), remainder enters settling tank and carries out mud-water separation, post precipitation water outlet discharging, and the sludge part that settling tank is got rid of returns anoxic pond, for the denitrification of anoxic pond provides microorganism (denitrifying bacteria), part is discharged in the mode of excess sludge.This method is only applicable to contain the lower sewage of ammonia nitrogen concentration (as sanitary sewage etc., wherein the concentration of ammonia nitrogen is generally 30～50mg/L), when ammonia nitrogen concentration is higher, returned sluge and mixed solution are very limited to the dilution of the ammonia nitrogen in the water inlet, cause in the anoxic pond ammonia nitrogen concentration higher, the growth of severe inhibition nitrifier.
In addition, because nitrifier exists a plurality of populations, under different substrate concns, running environment and the dynamic conditions, produce different moses.Want to make the nitrifier of interpolation to play a role to greatest extent in treatment system, the nitrifier population of artificial culture must be consistent with original nitrifier population in the Sewage treatment systems.This is that present nitrifier is cultivated an another important difficult problem that is faced.
Summary of the invention
In order to be implemented under the simple matrix, artificial culture goes out and the corresponding to nitrifier of Sewage treatment systems mos, carrying out biology then adds, reach the denitrification effect of strengthening the existing denitrification system in municipal sewage plant, overcome the problem that exists in the existing sewage treatment process, the invention provides a kind of employing sewage disposal plant by-products-sludge water and (come from the nitrated supernatant liquor of mud, concentration basin water outlet and sludge dewatering filtrate) in inverted A/O system, carry out the method for artificial culture nitrifier, when handling sludge water, turn out the nitrifier almost completely identical with the urban sewage treatment system mos, thereby reach Sewage treatment systems is carried out effectively biological the interpolation, strengthen and improve the denitrification effect of sewage work.
The technical solution adopted for the present invention to solve the technical problems is:
At ammonia nitrogen concentration height, C/N in the municipal sludge water treatment than the characteristics little, that basicity is big, know-why according to biological denitrificaion, the dynamic characteristic that utilizes the different population nitrifier to increase, reach and cultivate consistent and have active sludge, thereby provide condition for the nitrifier interpolation than high microorganism (nitrifier) concentration and greater activity with nitrifier groupy phase in the Sewage treatment systems.
The step of technology of the present invention is as follows:
(1) pending sludge water and returned sluge are mixed into the Aerobic Pond that is provided with aerating apparatus, be referred to as 0 section, under aerobic condition, the nitrifier in the returned sluge obtains energy by nitration reaction, carrying out cell proliferation, is nitrate with the ammonia oxidation in the pending sludge water.The sludge concentration of Aerobic Pond is 2～4g/L, and hydraulic detention time is 24～36 hours, and dissolved oxygen concentration is 2～3mg/L;
(2) mixed solution after nitrated enters the anoxic pond that is provided with whipping appts, be referred to as the A section, under anoxia condition, the denitrifying bacteria in the mud utilizes in the sludge water organism of self and the nitrate that produces of Aerobic Pond nitration reaction to carry out anti-nitration reaction, and nitrate is converted into nitrogen.Sludge concentration 2～the 4g/L of anoxic pond, hydraulic detention time are 6～9 hours, and redox potential is-100～0mV;
(3) enter settling tank through the mixed solution after the anaerobic treatment and carry out mud-water separation, supernatant liquor can be directly and the water outlet dual disposal of Sewage Plant, or the import of returning Sewage Plant is handled again, sedimentary sludge part returns Aerobic Pond and forms the mud backflow, for Aerobic Pond and anoxic pond provide reaction required microorganism (nitrifier and denitrifying bacteria), its return sludge ratio is 30～50%;
(4) excess sludge of post precipitation is collected as the nitrifier mud of cultivating, and the nitrifier concentration in this mud can reach 20～30%, as the additive of Sewage treatment systems biological denitrificaion reinforcement.This excess sludge not only has consistent with nitrifier groupy phase in the Sewage treatment systems and has than high microorganism (nitrifier) concentration and higher nitrification activity.
In the step 1 of technique scheme and step 2, mud is 3～5: 1 at the residence time ratio of Aerobic Pond and anoxic pond, and its most optimal retention time ratio is 4: 1.
In technique scheme, the nitrifier dominant population of being cultivated is Nitrosomonas (Nitrosomonas) and nitrated spirobacteria (Nitrospira).
The invention has the beneficial effects as follows:
(1) utilizes the ammonia nitrogen in the sludge water to carry out the cultivation of nitrifier, when reducing the sludge water ammonia and nitrogen pollution, realize the cultivation of nitrifier as matrix;
(2) the inverted A/O of employing system, sludge water at first contacts with Aerobic Pond, and the ammonia nitrogen of sludge water middle and high concentration is diluted and simultaneously by nitrated, has been eliminated the inhibition of ammonia nitrogen in high density to nitrifier, nitrifier rate of rise height;
(3) in inversion A/O system, the concentration of ammonia nitrogen maintains the lower level suitable with Sewage treatment systems all the time, therefore, the nitrifier population structure in the active sludge of cultivation is consistent with Sewage treatment systems, can bring into play maximum effect and effect behind biological the interpolation.
(4) excess sludge of post precipitation, be used for the biology of municipal sewage plant's denitrification dephosphorization system is added, the denitrogenation dephosphorizing effect of enhanced sewage treatment system, the denitrogenation dephosphorizing ability of raising system is suitable for carrying out the stable municipal sewage plant's Sewage treatment systems of mud with anaerobic digestion.
Description of drawings
Fig. 1 is inversion A of the present invention/O sludge water nitrifier culture process.
Embodiment:
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment 1
Certain sludge water ammonia nitrogen concentration is that 500～1000mg/L, C/N ratio is 1～2, basicity is that 2000mg/L is (with CaCO
3Meter).Adopt inversion A of the present invention/O sludge water nitrifier culture process (as shown in Figure 1), its concrete operations step is as follows:
(1) pending sludge water and returned sluge are mixed into the Aerobic Pond that is provided with aerating apparatus, are referred to as 0 section, under aerobic condition, the nitrifier in the returned sluge is converted into nitrate by nitration reaction with ammonia, obtains energy simultaneously, carries out cell proliferation.The sludge concentration 3.8g/L of Aerobic Pond, hydraulic detention time are 32 hours, and dissolved oxygen concentration is 2～3mg/L;
(2) mixed solution after nitrated enters the anoxic pond that is provided with whipping appts, under anoxia condition, be referred to as the A section, the denitrifying bacteria in the mud utilizes in the sludge water organism of self and the nitrate that produces of Aerobic Pond nitration reaction to carry out anti-nitration reaction, is nitrogen with nitrate reduction.The sludge concentration 3.8g/L of anoxic pond, hydraulic detention time are 8 hours; Redox potential is-60mV;
(3) enter settling tank through the mixed solution after the anaerobic treatment and carry out mud-water separation, the direct dual disposal of supernatant liquor, sedimentary sludge part returns Aerobic Pond and forms mud and reflux, and for Aerobic Pond and anoxic pond provide reaction required microorganism (nitrifier and denitrifying bacteria), return sludge ratio is 50%;
(4) excess sludge of post precipitation is collected as the active sludge of cultivating that is rich in nitrifier, as the additive of bio-denitrifying sewage intensive treatment.
In above-mentioned steps 1 and step 2, mud is 3～5: 1 at the residence time ratio of Aerobic Pond and anoxic pond, and its most optimal retention time ratio is 4: 1.
After the above-mentioned steps processing, the COD of water outlet and ammonia nitrogen concentration are respectively 50mg/L and below the 10mg/L, can satisfy the one-level B standard of national town sewage plant pollutant emission standard (GB18918-2002) regulation, nitrifier concentration has reached 24% of microorganism total amount in the excess sludge, the nitrifier dominant population is Nitrosomonas (Nitrosomonas) and nitrated spirobacteria (Nitrospira), with the nitrifier population basically identical that forms in the conventional municipal effluent biological denitrificaion treatment system, reached simultaneously sludge water has been handled dual purpose with the effective nitrifier of high-efficient culture.
Embodiment 2
Certain city sewage and sludge water treatment pilot plant, the COD concentration of sludge water is 600～800mg/L, and ammonia nitrogen concentration is 400～600mg/L, and pH is 8～9, and basicity is 1500～2000mg/L (in CaCO3).Adopt inversion A provided by the invention/O treatment process, as shown in Figure 1.When sludge water is handled, cultivate nitrifier and be used for the biological reinforcement of carrying out the sewage water denitrification processing of adding.
Concrete operations step of the present invention is as follows:
(1) pending sludge water and returned sluge are mixed into the Aerobic Pond that is provided with aerating apparatus, under aerobic condition, carry out nitration reaction under the nitrifier effect in returned sluge and obtain energy, carry out cell proliferation, ammonia nitrogen in the pending sludge water is oxidized to nitrate, the sludge concentration 3.2g/L of Aerobic Pond, hydraulic detention time are 24 hours, and dissolved oxygen concentration is 2～3mg/L;
(2) mixed solution after nitrated enters the anoxic pond that is provided with whipping appts, and under anoxia condition, the denitrifying bacteria in the mud utilizes in the sludge water organism of self and the nitrate that produces of Aerobic Pond nitration reaction to carry out anti-nitration reaction, and nitrate is converted into nitrogen.The sludge concentration 3.2g/L of anoxic pond, hydraulic detention time are 6 hours; Redox potential is-40mV;
(3) enter settling tank through the mixed solution after the anaerobic treatment and carry out mud-water separation, supernatant liquor returns the import of Sewage treatment systems and handles again, sedimentary sludge part returns Aerobic Pond and forms the mud backflow, for Aerobic Pond and anoxic pond provide reaction required microorganism (nitrifier and denitrifying bacteria), return sludge ratio is 40%;
(4) excess sludge of post precipitation is collected as the active sludge of cultivating that is rich in nitrifier, as the additive of bio-denitrifying sewage intensive treatment.
In above-mentioned steps 1 and step 2, mud is 4: 1 at the most optimal retention time ratio of Aerobic Pond and anoxic pond.
After the above-mentioned steps processing, the COD of water outlet and ammonia nitrogen concentration are respectively 60mg/L and below the 5mg/L, can satisfy the one-level B standard of national town sewage plant pollutant emission standard (GB18918-2002) regulation, nitrifier concentration has reached 21% of microorganism total amount in the excess sludge, the nitrifier dominant population is Nitrosomonas (Nitrosomonas) and nitrated spirobacteria (Nitrospira), with the nitrifier population basically identical that forms in the conventional municipal effluent biological denitrificaion treatment system, reached simultaneously sludge water has been handled dual purpose with the effective nitrifier of high-efficient culture.
Claims (4)
1. high-efficiency nitrifying bacterium culture process that is used for municipal sewage treatment, its processing step is as follows:
(1) pending sludge water and returned sluge are mixed into the Aerobic Pond that is provided with aerating apparatus, are referred to as the O section, under aerobic condition, carry out nitration reaction under the nitrifier effect in returned sluge, the ammonia nitrogen in the pending sludge water is oxidized to nitrate; The sludge concentration of Aerobic Pond is 2～4g/L, and hydraulic detention time is 24～36 hours, and dissolved oxygen concentration is 2～3mg/L;
(2) mixed solution after nitrated enters the anoxic pond that is provided with whipping appts, be referred to as the A section, under anoxia condition, the denitrifying bacteria in the mud utilizes in the sludge water organism of self and the nitrate that produces of Aerobic Pond nitration reaction to carry out anti-nitration reaction, is nitrogen with nitrate reduction; Sludge concentration 2～the 4g/L of anoxic pond, hydraulic detention time are 6～9 hours, and redox potential is-100～0mV;
(3) enter settling tank through the mixed solution after the anaerobic treatment and carry out mud-water separation, supernatant liquor can be directly and the water outlet dual disposal of Sewage Plant, or the import of returning Sewage Plant handles again, and sedimentary sludge part returns Aerobic Pond and forms mud and reflux, and its return sludge ratio is 30～50%;
(4) excess sludge of post precipitation is collected as the nitrifier active sludge of cultivating that is rich in, and the nitrifier concentration in this mud reaches 20～30%, gets additive as the bio-denitrifying sewage intensive treatment.
2. high-efficiency nitrifying bacterium culture process according to claim 1 is characterized in that: in step (1) and step (2), mud is 3～5: 1 at the residence time ratio of Aerobic Pond and anoxic pond.
3. high-efficiency nitrifying bacterium culture process according to claim 1 and 2, mud is 4: 1 at the most optimal retention time ratio of Aerobic Pond and anoxic pond.
4. high-efficiency nitrifying bacterium culture process according to claim 1 is characterized in that: the nitrifier dominant population of being cultivated is Nitrosomonas (Nitrosomonas) and nitrated spirobacteria (Nitrospira).
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973628A (en) * | 2010-10-19 | 2011-02-16 | 烟台大学 | Method for enrichment culture of nitrifying bacteria by using anaerobic digestion supernatant |
| CN102329058A (en) * | 2011-09-13 | 2012-01-25 | 凌志环保有限公司 | Three-segment biological treatment process and device for sewage |
| CN103011510A (en) * | 2012-12-14 | 2013-04-03 | 宁波恒洁水处理工程有限公司 | Biological denitrification treatment method of wastewater |
| CN104341083A (en) * | 2014-09-29 | 2015-02-11 | 北京交通大学 | Pharmaceutical sludge reduction treatment method |
| CN104370364A (en) * | 2014-11-18 | 2015-02-25 | 上海电力学院 | Method for enhancing nitration and phosphorus removal through co-treatment |
| CN105540873A (en) * | 2016-01-30 | 2016-05-04 | 常州市鼎升环保科技有限公司 | Method for treating tetracyclines antibiotic wastewater |
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| CN108862934A (en) * | 2018-08-10 | 2018-11-23 | 苏州立升膜分离科技有限公司 | Effluent treatment plant and drinking water purification system comprising the device |
| CN108911417A (en) * | 2018-08-10 | 2018-11-30 | 苏州立升膜分离科技有限公司 | Drinking water purification system |
| CN110204057A (en) * | 2019-06-20 | 2019-09-06 | 湖北中地星河环保科技有限公司 | A kind of technique with resistance to denitrifying bacteria processing high-salt sewage with high salt |
| CN110482702A (en) * | 2019-08-29 | 2019-11-22 | 安徽建筑大学 | A kind of high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption |
| CN112408602A (en) * | 2020-11-27 | 2021-02-26 | 江苏蓝必盛化工环保股份有限公司 | Salt-tolerant denitrification technology in high-salt pesticide chemical wastewater |
| CN114506923A (en) * | 2022-01-12 | 2022-05-17 | 西安建筑科技大学 | Biological denitrification device and method for coupling synchronous PD activated sludge with Anammox biological membrane |
| CN117756339A (en) * | 2023-12-29 | 2024-03-26 | 中交苏伊士泰兴环境投资有限公司 | Sewage treatment denitrification biological dephosphorization method and device |
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- 2009-12-09 CN CN200910219411A patent/CN101759295A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101973628B (en) * | 2010-10-19 | 2012-10-03 | 烟台大学 | Method for enrichment culture of nitrifying bacteria by using anaerobic digestion supernatant |
| CN101973628A (en) * | 2010-10-19 | 2011-02-16 | 烟台大学 | Method for enrichment culture of nitrifying bacteria by using anaerobic digestion supernatant |
| CN102329058A (en) * | 2011-09-13 | 2012-01-25 | 凌志环保有限公司 | Three-segment biological treatment process and device for sewage |
| CN103011510A (en) * | 2012-12-14 | 2013-04-03 | 宁波恒洁水处理工程有限公司 | Biological denitrification treatment method of wastewater |
| CN104341083A (en) * | 2014-09-29 | 2015-02-11 | 北京交通大学 | Pharmaceutical sludge reduction treatment method |
| CN104370364A (en) * | 2014-11-18 | 2015-02-25 | 上海电力学院 | Method for enhancing nitration and phosphorus removal through co-treatment |
| CN104370364B (en) * | 2014-11-18 | 2016-08-17 | 上海电力学院 | A kind of method of merging treatment strengthening nitrification and phosphorus removal |
| CN105540873B (en) * | 2016-01-30 | 2018-02-13 | 昆山华苏原料药有限公司 | A kind of method for handling tetracycline antibiotics waste water |
| CN105540873A (en) * | 2016-01-30 | 2016-05-04 | 常州市鼎升环保科技有限公司 | Method for treating tetracyclines antibiotic wastewater |
| CN107574117A (en) * | 2017-07-04 | 2018-01-12 | 河北地质大学 | A kind of preparation facilities and its method of penicillin resistant class amonifying bacteria microbial inoculum |
| CN108862934A (en) * | 2018-08-10 | 2018-11-23 | 苏州立升膜分离科技有限公司 | Effluent treatment plant and drinking water purification system comprising the device |
| CN108911417A (en) * | 2018-08-10 | 2018-11-30 | 苏州立升膜分离科技有限公司 | Drinking water purification system |
| CN110204057A (en) * | 2019-06-20 | 2019-09-06 | 湖北中地星河环保科技有限公司 | A kind of technique with resistance to denitrifying bacteria processing high-salt sewage with high salt |
| CN110482702A (en) * | 2019-08-29 | 2019-11-22 | 安徽建筑大学 | A kind of high-efficiency biological nitrogen and phosphorus removal system and method for the aerobic shunting based on ammonia nitrogen absorption |
| CN112408602A (en) * | 2020-11-27 | 2021-02-26 | 江苏蓝必盛化工环保股份有限公司 | Salt-tolerant denitrification technology in high-salt pesticide chemical wastewater |
| CN114506923A (en) * | 2022-01-12 | 2022-05-17 | 西安建筑科技大学 | Biological denitrification device and method for coupling synchronous PD activated sludge with Anammox biological membrane |
| CN117756339A (en) * | 2023-12-29 | 2024-03-26 | 中交苏伊士泰兴环境投资有限公司 | Sewage treatment denitrification biological dephosphorization method and device |
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