CN202898110U - Integration advanced nitrogen removal biological aerated filter - Google Patents
Integration advanced nitrogen removal biological aerated filter Download PDFInfo
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- CN202898110U CN202898110U CN 201220520822 CN201220520822U CN202898110U CN 202898110 U CN202898110 U CN 202898110U CN 201220520822 CN201220520822 CN 201220520822 CN 201220520822 U CN201220520822 U CN 201220520822U CN 202898110 U CN202898110 U CN 202898110U
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Abstract
The utility model relates to an integration advanced nitrogen removal biological aerated filter. The integration advanced nitrogen removal biological aerated filter comprises a water inlet system, an integration biological aerated filter, a carbon source addition system, an aerating system and a water flushing system which are connected, wherein the integration biological aerated filter is provided with a first supporting layer (1), a nitration region (3), a middle water layer (4), a gas-water separator (2), a second support layer (6), a denitrifiction region (7) and a clear water region (8) from bottom to top; the clear water region (8) is provided with a water discharging pipeline (9); the aerating system (10) and the water flashing system (14) are connected to the bottom of the integration biological aerated filter; the water inlet system (1) of the filter is connected with the nitration region (3) of the integration biological aerated filter; the carbon source addition system is connected with the denitrifiction region (7) of the integration biological aerated filter through a water distributor (13). The system occupies a small area and is simple in flow path and easy in formation of integration equipment.
Description
Technical field
The utility model belongs to dirty biological wastewater treatment technology field, is specially adapted to carrying of nitrogenous dirty waste water treatment plant and marks the newly-built of transformation or processing unit, is specifically related to a kind of device 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.
The utility model content
The purpose of this utility model is the problem that exists for present BAF technique, 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.
Utilize said apparatus to carry out the method for 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 that 3～8(is volume ratio), 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 beneficial effects of the utility model are: 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 the utility model integrated aeration boilogical filter tank deep denitrogenation device;
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 BAF of integrated 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 the BAF of described integrated advanced nitrogen 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.
Utilize said apparatus to carry out the method for 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 utility model is by adjusting the improvement with the BAF structure to BAF process operation mode, BAF is divided into nitrification zone, middle water layer and denitrification filtrating area, realize the good combination of nitrated, denitrification and filtering function, improve 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 is the further description of the utility model being done in conjunction with concrete preferred implementation, is convenient to these those skilled in the art and can understands and use the utility model, can not assert that implementation of the present utility model is confined to these explanations.Therefore, those skilled in the art should be within protection domain of the present utility model to the simple modifications that the utility model is made according to announcement of the present utility model.
Claims (1)
1. the BAF of integrated advanced nitrogen, it is characterized in that: 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).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520822 CN202898110U (en) | 2012-10-11 | 2012-10-11 | Integration advanced nitrogen removal biological aerated filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520822 CN202898110U (en) | 2012-10-11 | 2012-10-11 | Integration advanced nitrogen removal biological aerated filter |
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| Publication Number | Publication Date |
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| CN202898110U true CN202898110U (en) | 2013-04-24 |
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| CN 201220520822 Expired - Lifetime CN202898110U (en) | 2012-10-11 | 2012-10-11 | Integration advanced nitrogen removal biological aerated filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2012
- 2012-10-11 CN CN 201220520822 patent/CN202898110U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CX01 | Expiry of patent term |
Granted publication date: 20130424 |