CN102963981A - Method for deep denitrification of integrated biological aerated filter - Google Patents
Method for deep denitrification of integrated biological aerated filter Download PDFInfo
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- CN102963981A CN102963981A CN2012103848028A CN201210384802A CN102963981A CN 102963981 A CN102963981 A CN 102963981A CN 2012103848028 A CN2012103848028 A CN 2012103848028A CN 201210384802 A CN201210384802 A CN 201210384802A CN 102963981 A CN102963981 A CN 102963981A
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Abstract
Belonging to the technical field of biological sewage treatment, the invention relates to a method for deep denitrification of an integrated biological aerated filter, and the method is suitable for deep denitrification of sewage and wastewater. A device for deep denitrification of the integrated biological aerated filter mainly comprises: a water inlet system, the integrated biological aerated filter, a carbon source adding system and a back washing system. The integrated biological aerated filter adopts an upward flow operation mode, and is divided into a nitrification area and a denitrification area through a gas-water separator. The method includes: subjecting nitrogen-containing sewage and wastewater to ammonia nitrogen oxidation by the nitrification area at the lower part of the biological aerated filter; passing the gas through an intermediate water layer, then conducting separation and discharge; and making use of the electronic donor provided by an external carbon source in the denitrification area to complete deep removal of nitrogen. The device has a small floor area and a simple process, and is easy to form integrated equipment.
Description
Technical field
The invention belongs to dirty biological wastewater treatment technology field, be specially adapted to carrying of nitrogenous dirty waste water treatment plant and mark the newly-built of transformation or processing unit, be specifically related to a kind of apparatus and method of integrated aeration boilogical filter tank advanced nitrogen.
Background technology
BAF (Biological Aerated Filter, BAF) is the sewage disposal technology that is very suitable for China's national situation that integrates biomembrane biochemistry degraded and filtering layer filtering function, can realize the regeneration of water resources.BAF is larger than the biomass of other active sludge processing systems, and capacity of resisting impact load is strong, and volumetric loading is high, and floor space is little, and sludge yield is little, and treatment effect is stable, both can be used for the second-stage treatment of dirty waste water, also can be used for advanced treatment.
The major defect of tradition BAF is that biofilm development on the filler of bottom is very fast, so that the fillers such as haydite easily stop up, even hardens.Along with pollutent in the operational process is held back rapidly in filter bed, the porosity of filter bed can reduce rapidly, and it is fast to exist head loss to increase, the problem that the work period is short.
At present, dirty waste water is secondary or three grades of biological aerated filter process of adopting when taking off single the processing more, the nitration denitrification integrative biological filter is also arranged, and the ubiquity treatment scheme is long, capital cost is high, the complicated energy consumption of backwash operation is high, treatment effect is unstable, and the problem such as water outlet SS is difficult up to standard.
How on energy-saving and cost-reducing basis, optimize BAF structure and combination, improve the microbial species group structure, reduce the back flushing energy consumption, the strengthened denitrification effect is the study hotspot in BAF biological sewage treatment field in recent years.
Summary of the invention
The objective of the invention is the problem for present BAF technique existence, requirement in conjunction with energy-saving and cost-reducing and advanced nitrogen, the apparatus and method of integrated aeration boilogical filter tank advanced nitrogen are proposed, by tradition two sections denitrogenation BAF, nitration denitrification integrative biological filters are carried out the improvement of technique adjustment and structure formation, realize separating of nitrification zone and denitrification zone, separating of nitration denitrification effect and filtering function, realize the optimization of BAF backwash operation, finally realize the efficient denitrification of integral system and hold back suspended substance.
The device of integrated aeration boilogical filter tank advanced nitrogen, this device is connected to form by water inlet system, integrated aeration boilogical filter tank, carbon source dosing system, aerating system and water carriage system, it is characterized in that: integrated aeration boilogical filter tank is the first supporting layer 2, nitrification zone 3, middle water layer 4, air water separator 5, the second supporting layer 6, denitrification zone 7 and clear water zone 8 from bottom to up; Clear water zone 8 is provided with the pipeline 9 of discharge water; Aerating system 10 and water carriage system 14 are connected to the bottom of integrated aeration boilogical filter tank;
The nitrification zone 3 of described integrated aeration boilogical filter tank and the volume ratio of denitrification zone 7 are 1:1～4:1; Filtrate in described nitrification zone 3 and the denitrification zone 7 is light filler, and its proportion is between 1.0～1.5g/cm
3, porosity is 55%～85%; Water layer 4 is interior without filtrate in the middle of described, and it highly is 30%～40% of nitrification zone 3 height;
The funnel-form of described air water separator 5 is collected mouth and is installed on middle water layer 4; The exhaust side mounted valve 11 of described air water separator 5;
The middle water layer 4 of described integrated aeration boilogical filter tank arranges back flushing water shoot 15;
The water inlet system 1 of described device is connected with the nitrification zone 3 of integrated aeration boilogical filter tank; Described carbon source dosing system 12 is connected with the denitrification zone 7 of integrated aeration boilogical filter tank by water distributor 13; Described water carriage system 14 is connected with the integrated aeration boilogical filter tank bottom.
Utilize air water separator that BAF is divided into nitrification zone and denitrification filtrating area, realize separating of heterotrophic bacterium and autotrophic bacteria, realize the good combination of nitrated, denitrification and filtering function, improve the nitric efficiency of technique integral body, reduce the hydraulic detention time of process system.
Integrated aeration boilogical filter tank is denitrogenation/reactor, and the bottom is nitrated section, and the autotrophic type nitrifier is dominant bacteria, carries out the nitrated of ammonia nitrogen; Top is the denitrification denitrogenation fillter section, and the effectively catching suspended substance that microbial film etc. forms that comes off guarantees that water outlet SS reaches one-level A emission standard.
The present invention also provides the method for utilizing said apparatus to carry out dirty waste water advanced denitrogenation, may further comprise the steps:
1) nitrogenous dirty waste water pumps into the nitrification zone 3 of integrated aeration boilogical filter tank by water inlet system 1, and hydraulic detention time is 30～60min, and dissolved oxygen is 1.0～3.0mg/L;
2) nitrification zone 3 oxygenations of 10 pairs of BAF of aerating system, gas-water ratio is 3～8 (they being volume ratio), and the nitrifier that is attached on nitrification zone 3 fillers utilizes the dissolved oxygen in the water that most ammonia-nitrogen is oxidized to nitric nitrogen, and the control ammonia nitrogen concentration is 1-3mg/L;
3) water layer 4 in the middle of gas and liquid are flowed through, gas is by air water separator 5 dischargings; The liquid denitrification zone 7 of flowing through;
4) carbon source dosing system 12 is provided for the electron donor of denitrification denitrogenation by water distributor 13 to the denitrifying bacteria in the denitrification zone 7, and the nitric nitrogen in the mixed solution is reduced to nitrogen, and hydraulic detention time is 20～50min, and dissolved oxygen is 0.2～0.5mg/L;
5) the processing current of advanced nitrogen are through clear water zone 8, by pipeline 9 dischargings;
6) the integrated aeration boilogical filter tank operation was closed water inlet system 1 and carbon source dosing system 12 after 1-5 days, opened back flushing water shoot 15, utilized the clear water in the clear water zone 8 to get rid of denitrification zone 7 microbial film that comes off and the suspended substance of holding back;
7) the integrated aeration boilogical filter tank operation is after 10-20 days, to the integrated aeration boilogical filter tank back flushing, backwash gas and backwashing water enter respectively the bottom of integrated aeration boilogical filter tank by aerating system 10 and water carriage system 14, the back flushing draining is by 15 dischargings of back flushing water shoot.
Step 6) and 7) days running is relevant with influent quality, if water outlet is up to standard, influent quality is better, and the fate of operation is then longer.
The invention has the beneficial effects as follows: the integrated aeration boilogical filter tank deep denitrogenation device easily forms integration apparatus; Save floor space; The filler on BAF top is the light filler of high porosity, is difficult for stopping up; The denitrification filtrating area on BAF top is not subjected to the disturbance of aeration, and strainability is strong, and water outlet is limpid; BAF back flushing energy consumption is low, and backwashing period is long.
The setting of gas separator in the integrated aeration boilogical filter tank deep denitrogenation device, realize the separation of nitrification and denitrification effect, the bottom is nitrated section, and top is to disturb the denitrification fillter section without gas, the filtering function of enhanced aeration biological filter, the effectively catching suspended substance that microbial film etc. forms that comes off; The integrated aeration boilogical filter tank deep denitrogenation device does not need nitrification liquid to reflux, and realizes dirty waste water advanced denitrogenation; The change of integrated aeration boilogical filter tank backwash mode makes BAF back flushing energy consumption low, and backwashing period is long.
Description of drawings
Fig. 1 is the structural representation of integrated aeration boilogical filter tank deep denitrogenation device of the present invention;
Wherein: the 1-water inlet system; 2-the first supporting layer; The 3-nitrification zone; Water layer in the middle of the 4-; The 5-air water separator; 6-the second supporting layer; The 7-denitrification zone; 8-clear water layer; The 9-rising pipe; The 10-aerating system; The 11-gas emitting valve; 12-carbon source dosing system; The 13-water distributor; The 14-water carriage system; 15-back flushing water shoot.
Embodiment
Referring to Fig. 1, the device of integrated aeration boilogical filter tank advanced nitrogen, this device is connected to form by water inlet system, integrated aeration boilogical filter tank, carbon source dosing system, aerating system and water carriage system, it is characterized in that: integrated aeration boilogical filter tank is the first supporting layer 2, nitrification zone 3, middle water layer 4, air water separator 5, the second supporting layer 6, denitrification zone 7 and clear water zone 8 from bottom to up;
The nitrification zone 3 of described integrated aeration boilogical filter tank and the volume ratio of denitrification zone 7 are 1:1～4:1; Filtrate in described nitrification zone 3 and the denitrification zone 7 is light filler, and its proportion is between 1.0～1.5g/cm
3, porosity is 55%～85%; Water layer 4 is interior without filtrate in the middle of described, and it highly is 30%～40% of nitrification zone 3 height;
The funnel-form of described air water separator 5 is collected mouth and is installed on middle water layer 4, and air water separator 5 passes denitrification zone 7; The exhaust side mounted valve 11 of described air water separator 5;
The middle water layer 4 of described integrated aeration boilogical filter tank arranges back flushing water shoot 15;
The water inlet system 1 of described device is connected with the nitrification zone 3 of integrated aeration boilogical filter tank; Described carbon source dosing system 12 is connected with the denitrification zone 7 of integrated aeration boilogical filter tank by water distributor 13; Described water carriage system 14 is connected with the integrated aeration boilogical filter tank bottom.
Utilize air water separator that BAF is divided into nitrification zone and denitrification filtrating area, realize separating of heterotrophic bacterium and autotrophic bacteria, realize the good combination of nitrated, denitrification and filtering function, improve the nitric efficiency of technique integral body, reduce the hydraulic detention time of process system.
Integrated aeration boilogical filter tank is denitrogenation/reactor, and the bottom is nitrated section, and the autotrophic type nitrifier is dominant bacteria, carries out the nitrated of ammonia nitrogen; Top is the denitrification denitrogenation fillter section, efficient denitrification, and simultaneously the effectively catching suspended substance that microbial film etc. forms that comes off guarantees that water outlet TN and SS reach one-level A emission standard.
The present invention also provides the method for utilizing said apparatus to carry out dirty waste water advanced denitrogenation, may further comprise the steps:
1) nitrogenous dirty waste water pumps into the nitrification zone 3 of integrated aeration boilogical filter tank by water inlet system 1, and hydraulic detention time is 30～60min, and dissolved oxygen is 1.0～3.0mg/L;
2) nitrification zone 3 oxygenations of 10 pairs of BAF of aerating system, gas-water ratio is 3～8, and the nitrifier that is attached on nitrification zone 3 fillers utilizes the dissolved oxygen in the water that most ammonia-nitrogen is oxidized to nitric nitrogen, and the control ammonia nitrogen concentration is 1-3mg/L;
3) water layer 4 in the middle of gas and liquid are flowed through, gas is by air water separator 5 dischargings; The liquid denitrification zone 7 of flowing through;
4) carbon source dosing system 12 is provided for the electron donor of denitrification denitrogenation by water distributor 13 to the denitrifying bacteria in the denitrification zone 7, and the nitric nitrogen in the mixed solution is reduced to nitrogen, and hydraulic detention time is 20～50min, and dissolved oxygen is 0.2～0.5mg/L;
5) the processing current of advanced nitrogen are through clear water zone 8, by pipeline 9 dischargings;
6) the integrated aeration boilogical filter tank operation was closed water inlet system 1 and carbon source dosing system 12 after 1-5 days, opened back flushing water shoot 15, utilized the clear water in the clear water zone 8 to get rid of denitrification zone 7 microbial film that comes off and the suspended substance of holding back;
7) the integrated aeration boilogical filter tank operation is after 10-20 days, to the integrated aeration boilogical filter tank back flushing, backwash gas and backwashing water enter respectively the bottom of integrated aeration boilogical filter tank by aerating system 10 and water carriage system 14, the back flushing draining is by 15 dischargings of back flushing water shoot.
The present invention is divided into nitrification zone, middle water layer and denitrification filtrating area by BAF process operation mode being adjusted the improvement with the BAF structure with BAF, realizes the good combination of nitrated, denitrification and filtering function, improves the nitric efficiency of integral process; Realize separating of nitrated section of autotrophic type and heterotroph denitrification section backwash operation, save energy consumption, the prolongation backwashing period.
Embodiment:
Take certain AAO-BAF system second pond water outlet as processing object, the proportion of filler is 1.005g/cm in the integrated aeration boilogical filter tank deep denitrogenation device
3, porosity is 79%, the empty bed residence time is less than 1.2h, water inlet NH
4 +-N is between 9～19mg/L, and test temperature is 20～25 ℃.Under the test conditions, ammonia nitrogen removal is loaded greater than 0.8 kgNH
4 +-N/ (m
3.d), system is to NH
4 +The average removal rate of-N and TN reaches respectively 95% and 80%; The backwashing period of integrated aeration boilogical filter tank reaches 20d.
Above content be in conjunction with concrete preferred implementation to the further description that the present invention does, being convenient to these those skilled in the art can understand and apply the invention, and can not assert that implementation of the present invention is confined to these explanations.Therefore, those skilled in the art should be within protection scope of the present invention to the simple modifications that the present invention makes according to announcement of the present invention.
Claims (1)
1. the method for integrated aeration boilogical filter tank advanced nitrogen, it is characterized in that: use with lower device, this device is connected to form by water inlet system, integrated aeration boilogical filter tank, carbon source dosing system, aerating system and water carriage system, and integrated aeration boilogical filter tank is the first supporting layer (2), nitrification zone (3), middle water layer (4), air water separator (5), the second supporting layer (6), denitrification zone (7) and clear water zone (8) from bottom to up; Clear water zone (8) is provided with the pipeline (9) of discharge water; Aerating system (10) and water carriage system (14) are connected to the bottom of integrated aeration boilogical filter tank;
The volume ratio of the nitrification zone of described integrated aeration boilogical filter tank (3) and denitrification zone (7) is 1:1～4:1; Filtrate in described nitrification zone (3) and the denitrification zone (7) is light filler, and its proportion is between 1.0～1.5g/cm
3, porosity is 55%～85%; Water layer (4) is interior without filtrate in the middle of described, and it highly is 30%～40% of nitrification zone (3) height;
The funnel-form of described air water separator (5) is collected mouth and is installed on middle water layer (4); The exhaust side mounted valve (11) of described air water separator (5);
The middle water layer (4) of described integrated aeration boilogical filter tank arranges back flushing water shoot (15);
The water inlet system of described device (1) is connected with the nitrification zone (3) of integrated aeration boilogical filter tank; Described carbon source dosing system (12) is connected with the denitrification zone (7) of integrated aeration boilogical filter tank by water distributor (13);
Described method is carried out according to the following steps:
1) nitrogenous dirty waste water pumps into the nitrification zone (3) of integrated aeration boilogical filter tank by water inlet system (1), and hydraulic detention time is 30～60min, and dissolved oxygen is 1.0～3.0mg/L;
2) aerating system (10) is to nitrification zone (3) oxygenation of BAF, and gas-water ratio is 3～8, and the nitrifier that is attached on nitrification zone (3) filler utilizes the dissolved oxygen in the water that most ammonia-nitrogen is oxidized to nitric nitrogen, and the control ammonia nitrogen concentration is 1-3mg/L;
3) water layer (4) in the middle of gas and liquid are flowed through, gas is by air water separator (5) discharging; The liquid denitrification zone (7) of flowing through;
4) carbon source dosing system (12) is provided for the electron donor of denitrification denitrogenation to the denitrifying bacteria in the denitrification zone (7) by water distributor (13), nitric nitrogen in the mixed solution is reduced to nitrogen, hydraulic detention time is 20～50min, and dissolved oxygen is 0.2～0.5mg/L;
5) the processing current of advanced nitrogen discharge by pipeline (9) through clear water zone (8);
6) the integrated aeration boilogical filter tank operation is after 1-5 days, close water inlet system (1) and carbon source dosing system (12), open back flushing water shoot (15), utilize the clear water in the clear water zone (8) to get rid of denitrification zone (7) microbial film that comes off and the suspended substance of holding back;
7) the integrated aeration boilogical filter tank operation is after 10-20 days, to the integrated aeration boilogical filter tank back flushing, backwash gas and backwashing water enter respectively the bottom of integrated aeration boilogical filter tank by aerating system (10) and water carriage system (14), the back flushing draining is discharged by back flushing water shoot (15).
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Cited By (8)
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| CN103739071A (en) * | 2014-01-10 | 2014-04-23 | 博天环境集团股份有限公司 | Slightly-polluted surface water denitrification method |
| CN103979681A (en) * | 2014-04-03 | 2014-08-13 | 江苏蓝晨环保科技有限公司 | Nitrification/denitrification integrated rural domestic sewage treatment system |
| CN104609550A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Method for removing ammonia nitrogen in wastewater by use of immobilized sludge particles |
| CN105330020A (en) * | 2015-11-06 | 2016-02-17 | 东莞市环境科学研究所 | Synchronous biochemical advanced oxidation liquid waste treatment method and device |
| WO2017088823A1 (en) * | 2015-09-25 | 2017-06-01 | 上海凡清环境工程有限公司 | Integrated synchronized nitrification and denitrification sewage treatment apparatus |
| CN108264146A (en) * | 2018-02-11 | 2018-07-10 | 杭州宸祥环境工程有限公司 | A kind of sewage water filtration method of denitrification deep-bed filter |
| CN110902827A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | High-efficiency biological denitrification moving bed biofilm reactor and operation process thereof |
| CN111995048A (en) * | 2020-09-09 | 2020-11-27 | 四川省科学城天人环保有限公司 | Rear denitrification filter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104609550A (en) * | 2013-11-05 | 2015-05-13 | 中国石油化工股份有限公司 | Method for removing ammonia nitrogen in wastewater by use of immobilized sludge particles |
| CN103739071A (en) * | 2014-01-10 | 2014-04-23 | 博天环境集团股份有限公司 | Slightly-polluted surface water denitrification method |
| CN103739071B (en) * | 2014-01-10 | 2016-06-15 | 博天环境集团股份有限公司 | Micro-polluted surface water denitrifying method |
| CN103979681A (en) * | 2014-04-03 | 2014-08-13 | 江苏蓝晨环保科技有限公司 | Nitrification/denitrification integrated rural domestic sewage treatment system |
| CN103979681B (en) * | 2014-04-03 | 2015-06-17 | 江苏蓝晨环保科技有限公司 | Nitrification/denitrification integrated rural domestic sewage treatment system |
| WO2017088823A1 (en) * | 2015-09-25 | 2017-06-01 | 上海凡清环境工程有限公司 | Integrated synchronized nitrification and denitrification sewage treatment apparatus |
| CN105330020A (en) * | 2015-11-06 | 2016-02-17 | 东莞市环境科学研究所 | Synchronous biochemical advanced oxidation liquid waste treatment method and device |
| CN108264146A (en) * | 2018-02-11 | 2018-07-10 | 杭州宸祥环境工程有限公司 | A kind of sewage water filtration method of denitrification deep-bed filter |
| CN110902827A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | High-efficiency biological denitrification moving bed biofilm reactor and operation process thereof |
| CN111995048A (en) * | 2020-09-09 | 2020-11-27 | 四川省科学城天人环保有限公司 | Rear denitrification filter |
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Effective date of registration: 20160526 Address after: 100124 Beijing City, Chaoyang District No. 101 East boziwan Patentee after: Beijing Enterprises Water (China) Investment Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Beijing University of Technology |
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Inventor after: Wang Chuanxin Inventor after: Peng Yongzhen Inventor after: Li Li Inventor after: Jia Limin Inventor after: Shi Yanwei Inventor after: Zhang Weitang Inventor after: Wang Shuying Inventor before: Wang Chuanxin Inventor before: Peng Yongzhen Inventor before: Zhang Weitang Inventor before: Wang Shuying |
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