CN104276730A - Efficient intensive nitrogen and phosphorus removal sewage treatment process - Google Patents
Efficient intensive nitrogen and phosphorus removal sewage treatment process Download PDFInfo
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- CN104276730A CN104276730A CN201410557374.3A CN201410557374A CN104276730A CN 104276730 A CN104276730 A CN 104276730A CN 201410557374 A CN201410557374 A CN 201410557374A CN 104276730 A CN104276730 A CN 104276730A
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- anaerobic tank
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to an efficient intensive nitrogen and phosphorus removal sewage treatment process which comprises the following steps: sequentially arranging an anaerobic pool I, a packing pool I, an anaerobic pool II and a packing pool II along a water flow direction in parallel to be combined to form a poly-section A/O form; respectively injecting sewage into the anaerobic pool I and the anaerobic pool II by way of feeding water at different points; sequentially carrying out denitrification and phosphorus release treatments, and then, carrying out nitrification and phosphorus uptake treatments in the packing pool I and the packing pool II; and finally, automatically flowing to a dynamic film filter pool for separating mud and water, wherein a part of concentrated sludge returns to the anaerobic pool I while the rest is discharged, the supernate filtered by the dynamic film enters into the next treatment unit via a drain pipeline, namely implementing the nitrogen and phosphorus removal operation of to-be-treated sewage. Compared with the prior art, by adopting the poly-section A/O form and the dynamic film filter pool, the process is fast in pollutant removal efficiency, short in process flow, occupies less floor space and is good in effluent quality, and provides better technical selection to new and reconstructed projects of a sewage treatment plant.
Description
Technical field
The invention belongs to environmental technology field, relate to a kind of sewage treatment process, especially relate to a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process.
Background technology
The fast development that China's urban wastewater treatment firm is built, keying action is played in water pollution control, but the sewage work of twentieth century construction presses secondary or three grades of emission standards designs, the ubiquity residence time too short, function too simple question, dephosphorization denitrogenation and maximum discharge standard are carried mark and are transformed into inevitable; And to put forward the difficult problem that generally runs in mark transformation be exactly that floor space is limited.
At present, the process for removing nitrogen and phosphor from sewage of China is various, and based on the large series of processes of A/A/O, oxidation ditch and SBR tri-, wherein A/A/O series of processes is with its simple structure, stable water outlet, controls the advantages such as convenient, becomes the first-selected technique that large-scale wastewater treatment plant is built.A/A/O series of processes is widely used, various informative, common are A/A/O, inversion A/A/O, improvement A/A/O, Bardenpho, about fort technique, UCT, MUCT, multistage A/O technique etc.Wherein multistage A/O technique is intake due to branch, makes the leading portion of technique form higher sludge concentration, improves the speed of reaction of system, can complete the removal of pollutent in the short period of time, save sewage work's floor space.Because multistage A/O technique is in series by multistage AO, therefore do not need internal reflux just can obtain good denitrification effect, effectively save the energy consumption run.And the biomass that filler can increase biochemical treatment system is further set in conventional biochemical reaction tank, the treatment efficiency of lifting sewage treatment process.
Along with emission standard improves constantly, required sewage treatment process becomes increasingly complex, the residence time is more and more longer, energy and material consumption is increasing.Traditional MBR technique can solve occupation of land problem preferably, but the unfavorable factor such as membrane flux is low, fouling membrane, construction and running cost are high, limit the popularization of membrane filtration technique.For the difficult problem that wastewater treatment in China Facilities Construction faces, still lack save land, energy-conservation, cost-saving high-efficient denitrification and dephosphorization Technology.
Summary of the invention
Object of the present invention is exactly provide a kind of short route denitrification dephosphorization technique of high-efficiency low energy consumption to overcome defect that above-mentioned prior art exists, the problem that current waste water processes is long for solving, floor space is bigger than normal, for sewage work is newly-built and improvement project provides the better choice of technology, provide technical support for urban water environmental quality improves.
Object of the present invention can be achieved through the following technical solutions:
A kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process, this technique is by anaerobic tank one, filler pond one, anaerobic tank two and filler pond two are arranged in series successively along water (flow) direction, be combined into multistage A/O configuration, and by mode that branch is intake, treatment sewage is injected respectively anaerobic tank one and anaerobic tank two, treatment sewage in described anaerobic tank one is successively through denitrification, after releasing phosphorus process, gravity flow enter carry out successively in filler pond one nitrated, inhale phosphorus process, subsequently, gravity flow enters in anaerobic tank two, after mixing with the water inlet of anaerobic tank two, carry out denitrification successively again, release phosphorus process, and gravity flow enter carry out successively in filler pond two nitrated, inhale phosphorus process, finally, the water outlet in filler pond two enters in dynamic membrane filtering pond by pipeline self, carry out mud-water separation, form precipitating sludge and supernatant liquor, described precipitating sludge forms thickened sludge after concentrated, this thickened sludge part is back to anaerobic tank one, remainder is discharged, described supernatant liquor is after dynamic membrane filtering, next processing unit is entered by drainage pipeline, namely the denitrogenation dephosphorizing operation for the treatment of sewage is completed.
Described anaerobic tank one is all connected with a upper processing unit by distributive pipe with the water-in of anaerobic tank two, and described filler pond two-way piping is connected with dynamic membrane filtering pond, and the water level in described dynamic membrane filtering pond is lower than the water level in filler pond two.
Gravitational settling enrichment region and dynamic membrane filtering district is provided with successively along water (flow) direction in described dynamic membrane filtering pond, the bottom of described gravitational settling enrichment region is provided with sludge return pipe and spoil disposal pipeline, described gravitational settling enrichment region is connected with anaerobic tank one by sludge return pipe, described sludge return pipe is provided with sludge reflux pump, the water outlet in described dynamic membrane filtering district is connected to next processing unit by drainage pipeline, and described drainage pipeline is provided with water pump.
Be provided with multiple filling layers along water (flow) direction in described filler pond one, filler pond two, described filler is arranged perpendicular to the base plate in pond, and the spacing between adjacent two layers filler is 10cm, the specific surface area > 1000m of described filler
2/ m
3.
In described filler pond one, filler pond two, the total area of every cubic metre of filler is 4 ~ 10m
2.
The bottom in described filler pond one, filler pond two and dynamic membrane filtering district is all connected with gas blower by ventpipe.
The flooding quantity of described anaerobic tank one is 50 ~ 70% for the treatment of sewage total amount.
Denitrification in described anaerobic tank one, release phosphorus process and comprise leading portion anti-nitration reaction a and back segment releases phosphorus reaction c, the time of described leading portion anti-nitration reaction a is 0.5 ~ 1h, and the time that described back segment releases phosphorus reaction c is 1 ~ 1.5h;
Denitrification in described anaerobic tank two, release phosphorus process and comprise leading portion anti-nitration reaction b and back segment releases phosphorus reaction d, the time of described leading portion anti-nitration reaction b is 1 ~ 2h, and the time that described back segment releases phosphorus reaction d is 0.5 ~ 1h;
Condition that is nitrated, that inhale phosphorus process in described filler pond one, filler pond two is: hydraulic detention time is 2 ~ 3h, and the concentration controlling dissolved oxygen is 1.0 ~ 3.0mg/L.
The hydraulic detention time of described gravitational settling enrichment region is 1 ~ 2h, and the concentration of described thickened sludge is 4000 ~ 8000mg/L, and with 30 ~ 100% reflux ratio, be back to anaerobic tank one through sludge return pipe.
The SS content < 1000mg/L of supernatant liquor in described dynamic membrane filtering district, the flux of dynamic membrane filtering is 60 ~ 150L/ (m
2.d).
Described anaerobic tank one, anaerobic tank two are mainly through stirring, maintain the suspended state of active sludge, second described filler pond one, filler pond are supplied by gas blower and ventpipe and are met the oxygen amount needed for biochemical reaction and the suspended state maintaining active sludge in pond.
In described dynamic membrane filtering pond, secondary treatment sewage, first by gravitational settling, removes most of suspended solids, after the precipitating sludge of formation is concentrated further, under the effect of sludge reflux pump, the reflux ratio by 30 ~ 100% is back to anaerobic tank one through sludge return pipe; And there is the supernatant liquor of certain turbidity, then after dynamic membrane filtering, enter next processing unit by drainage pipeline.
Described dynamic membrane filtering pond, at initial operating stage, can utilize static pressure to filter, and when resistance increases, can utilize water pump suction filtration, meanwhile, starts the automatic cleaning process of Dynamic Membrane.
The Environmental capacity of Dynamic Membrane, dynamically can be rinsed by waterpower and clean two kinds of forms with machine automatization and come.When the mud cake formed on Dynamic Membrane surface thickens, resistance is caused to increase, when only relying on static pressure to filter, start water pump and carry out suction filtration, when filtration resistance loss is more than 2m head, start machine automatization cleaning, during cleaning, stop filtering, can complete the precoating of Dynamic Membrane after having cleaned through 5 ~ 10min, water outlet SS is less than 5mg/L.
In the dynamic membrane filtering district in described dynamic membrane filtering pond, suspended solids with rinse air flow contacts, organic removal, the aerobic reaction process such as nitrated can be carried out, provide certain guarantee for stable effluent quality is up to standard.
Compared with prior art, the present invention has following characteristics:
1) pass through in aggregates to anaerobic tank one, filler pond one, anaerobic tank two and filler pond two series combination, form multistage A/O serial configured, the high-efficient denitrification and dephosphorization process to treatment sewage can be realized, contaminant removal efficiency is fast, technical process is short, small accommodation area, effluent quality be good;
2) adopt gravitational settling, dynamic membrane filtering pond that concentrated and dynamic membrane filtering combines, the sludge-water separating system of stability and high efficiency can be formed, water outlet leading indicator can meet GB18918-2002 one-level A standard, is particularly suitable for the newly-built and upgrading project of the sewage work of the demand of saving land;
3) sewage treatment process is simple, and the residence time is short, and energy and material consumption is little, and construction feasibility is high, and running cost is low.
Accompanying drawing explanation
Fig. 1 is the device schema of a kind of Highly Effective type of the present invention denitrogenation dephosphorizing sewage treatment process;
Description of symbols in figure:
1-anaerobic tank one, 2-filler pond one, 3-anaerobic tank two, 4-filler pond two, 5-dynamic membrane filtering pond, 6-dynamic membrane filtering district, 7-gas blower, 8-sludge reflux pump, 9-water pump, 10-gravitational settling enrichment region, 11-sludge return pipe, 12-drainage pipeline, 13-spoil disposal pipeline, 14-filler, 15-ventpipe, 16-distributive pipe.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment:
As shown in Figure 1, a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process, this technique is by anaerobic tank 1, filler pond 1, anaerobic tank 23 and filler pond 24 are arranged in series successively along water (flow) direction, be combined into multistage A/O configuration, and by mode that branch is intake, treatment sewage is injected respectively anaerobic tank 1 and anaerobic tank 23, treatment sewage in anaerobic tank 1 is successively through denitrification, after releasing phosphorus process, gravity flow enter carry out successively in filler pond 1 nitrated, inhale phosphorus process, subsequently, gravity flow enters in anaerobic tank 23, after mixing with the water inlet of anaerobic tank 23, carry out denitrification successively again, release phosphorus process, and gravity flow enter carry out successively in filler pond 24 nitrated, inhale phosphorus process, finally, the water outlet in filler pond 24 enters in dynamic membrane filtering pond 5 by pipeline self, carry out mud-water separation, form precipitating sludge and supernatant liquor, precipitating sludge forms thickened sludge after concentrated, this thickened sludge part is back to anaerobic tank 1, remainder is discharged, supernatant liquor is after dynamic membrane filtering, next processing unit is entered by drainage pipeline 12, namely the denitrogenation dephosphorizing operation for the treatment of sewage is completed.
Wherein, anaerobic tank 1 is all connected with a upper processing unit by distributive pipe 16 with the water-in of anaerobic tank 23, described filler pond 24 is connected with dynamic membrane filtering pond 5 by pipeline, and the water level in described dynamic membrane filtering pond 5 is lower than the water level in filler pond 24.
Gravitational settling enrichment region 10 and dynamic membrane filtering district 6 is provided with successively along water (flow) direction in dynamic membrane filtering pond 5, the bottom of described gravitational settling enrichment region 10 is provided with sludge return pipe 11 and spoil disposal pipeline 13, described gravitational settling enrichment region 10 is connected with anaerobic tank 1 by sludge return pipe 11, described sludge return pipe 11 is provided with sludge reflux pump 8, the water outlet in described dynamic membrane filtering district 6 is connected to next processing unit by drainage pipeline 12, and described drainage pipeline 12 is provided with water pump 9.
Be provided with multiple filling layers 14 along water (flow) direction in filler pond 1, filler pond 24, filler 14 is arranged perpendicular to the base plate in pond, and the spacing between adjacent two layers filler 14 is 10cm, the specific surface area > 1000m of filler 14
2/ m
3.
In filler pond 1, filler pond 24, the total area of every cubic metre of filler 14 is 4 ~ 10m
2.
The bottom in filler pond 1, filler pond 24 and dynamic membrane filtering district 6 is all connected with gas blower 7 by ventpipe 15.
The flooding quantity of anaerobic tank 1 is 50 ~ 70% for the treatment of sewage total amount.
Denitrification in anaerobic tank 1, release phosphorus process and comprise leading portion anti-nitration reaction a and back segment releases phosphorus reaction c, the time of leading portion anti-nitration reaction a is 0.5 ~ 1h, and the time that back segment releases phosphorus reaction c is 1 ~ 1.5h;
Denitrification in anaerobic tank 23, release phosphorus process and comprise leading portion anti-nitration reaction b and back segment releases phosphorus reaction d, the time of leading portion anti-nitration reaction b is 1 ~ 2h, and the time that back segment releases phosphorus reaction d is 0.5 ~ 1h;
Condition that is nitrated, that inhale phosphorus process in filler pond 1, filler pond 24 is: hydraulic detention time is 2 ~ 3h, and the concentration controlling dissolved oxygen is 1.0 ~ 3.0mg/L.
The hydraulic detention time of gravitational settling enrichment region 10 is 1 ~ 2h, and the concentration of described thickened sludge is 4000 ~ 8000mg/L, and with 30 ~ 100% reflux ratio, be back to anaerobic tank 1 through sludge return pipe 11.
The SS content < 1000mg/L of supernatant liquor in dynamic membrane filtering district 6, the flux of dynamic membrane filtering is 60 ~ 150L/ (m
2.d).
Anaerobic tank 1 and anaerobic tank 22 are mainly through stirring, and maintain the suspended state of active sludge, filler pond 1 and 24, filler pond are supplied by gas blower 7 and ventpipe 15 and met the oxygen amount needed for biochemical reaction and the suspended state maintaining active sludge in pond.
In dynamic membrane filtering pond 5, secondary treatment sewage, first by gravitational settling, removes most of suspended solids, after the precipitating sludge of formation is concentrated further, under the effect of sludge reflux pump 8, the reflux ratio by 30 ~ 100% is back to anaerobic tank 1 through sludge return pipe 11; And there is the supernatant liquor of certain turbidity, then after dynamic membrane filtering, enter next processing unit by drainage pipeline 12.
Dynamic membrane filtering pond 5, at initial operating stage, can utilize static pressure to filter, and when resistance increases, can utilize water pump 9 suction filtration, meanwhile, starts the automatic cleaning process of Dynamic Membrane.
The Environmental capacity of Dynamic Membrane, dynamically can be rinsed by waterpower and clean two kinds of forms with machine automatization and come.When the mud cake formed on Dynamic Membrane surface thickens, resistance is caused to increase, when only relying on static pressure to filter, start water pump 9 and carry out suction filtration, when filtration resistance loss is more than 2m head, start machine automatization cleaning, during cleaning, stop filtering, can complete the precoating of Dynamic Membrane after having cleaned through 5 ~ 10min, water outlet SS is less than 5mg/L.
In the dynamic membrane filtering district 6 in dynamic membrane filtering pond 5, suspended solids with rinse air flow contacts, organic removal, the aerobic reaction process such as nitrated can be carried out, provide certain guarantee for stable effluent quality is up to standard.
Claims (10)
1. a Highly Effective type denitrogenation dephosphorizing sewage treatment process, it is characterized in that, this technique is by anaerobic tank one (1), filler pond one (2), anaerobic tank two (3) and filler pond two (4) are arranged in series successively along water (flow) direction, be combined into multistage A/O configuration, and by mode that branch is intake, treatment sewage is injected respectively anaerobic tank one (1) and anaerobic tank two (3), treatment sewage in described anaerobic tank one (1) is successively through denitrification, after releasing phosphorus process, gravity flow enter carry out successively in filler pond one (2) nitrated, inhale phosphorus process, subsequently, gravity flow enters in anaerobic tank two (3), after mixing with the water inlet of anaerobic tank two (3), carry out denitrification successively again, release phosphorus process, and gravity flow enter carry out successively in filler pond two (4) nitrated, inhale phosphorus process, finally, the water outlet in filler pond two (4) enters in dynamic membrane filtering pond (5) by pipeline self, carry out mud-water separation, form precipitating sludge and supernatant liquor, described precipitating sludge forms thickened sludge after concentrated, this thickened sludge part is back to anaerobic tank one (1), remainder is discharged, described supernatant liquor is after dynamic membrane filtering, next processing unit is entered by drainage pipeline (12), namely the denitrogenation dephosphorizing operation for the treatment of sewage is completed.
2. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1, it is characterized in that, described anaerobic tank one (1) is all connected with a upper processing unit by distributive pipe (16) with the water-in of anaerobic tank two (3), described filler pond two (4) is connected with dynamic membrane filtering pond (5) by pipeline, and the water level in described dynamic membrane filtering pond (5) is lower than the water level in filler pond two (4).
3. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1 or 2 or 3, it is characterized in that, gravitational settling enrichment region (10) and dynamic membrane filtering district (6) are provided with successively along water (flow) direction in described dynamic membrane filtering pond (5), the bottom of described gravitational settling enrichment region (10) is provided with sludge return pipe (11) and spoil disposal pipeline (13), described gravitational settling enrichment region (10) is connected with anaerobic tank one (1) by sludge return pipe (11), described sludge return pipe (11) is provided with sludge reflux pump (8), the water outlet in described dynamic membrane filtering district (6) is connected to next processing unit by drainage pipeline (12), described drainage pipeline (12) is provided with water pump (9).
4. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1 and 2, it is characterized in that, multiple filling layers (14) is provided with along water (flow) direction in described filler pond one (2), filler pond two (4), described filler (14) is arranged perpendicular to the base plate in pond, spacing between adjacent two layers filler (14) is 10cm, the specific surface area > 1000m of described filler (14)
2/ m
3.
5. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 4, it is characterized in that, in described filler pond one (2), filler pond two (4), the total area of every cubic metre of filler (14) is 4 ~ 10m
2.
6. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1 or 3, it is characterized in that, the bottom of described filler pond one (2), filler pond two (4) and dynamic membrane filtering district (6) is all connected with gas blower (7) by ventpipe (15).
7. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1, it is characterized in that, the flooding quantity of described anaerobic tank one (1) is 50 ~ 70% for the treatment of sewage total amount.
8. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1, it is characterized in that, denitrification in described anaerobic tank one (1), release phosphorus process and comprise leading portion anti-nitration reaction a and back segment releases phosphorus reaction c, the time of described leading portion anti-nitration reaction a is 0.5 ~ 1h, and the time that described back segment releases phosphorus reaction c is 1 ~ 1.5h;
Denitrification in described anaerobic tank two (3), release phosphorus process and comprise leading portion anti-nitration reaction b and back segment releases phosphorus reaction d, the time of described leading portion anti-nitration reaction b is 1 ~ 2h, and the time that described back segment releases phosphorus reaction d is 0.5 ~ 1h;
Condition that is nitrated, that inhale phosphorus process in described filler pond one (2), filler pond two (4) is: hydraulic detention time is 2 ~ 3h, and the concentration controlling dissolved oxygen is 1.0 ~ 3.0mg/L.
9. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1 or 3, it is characterized in that, the hydraulic detention time of described gravitational settling enrichment region (10) is 1 ~ 2h, the concentration of described thickened sludge is 4000 ~ 8000mg/L, and with 30 ~ 100% reflux ratio, be back to anaerobic tank one (1) through sludge return pipe (11).
10. a kind of Highly Effective type denitrogenation dephosphorizing sewage treatment process according to claim 1 or 3, it is characterized in that, the SS content < 1000mg/L of supernatant liquor in described dynamic membrane filtering district (6), the flux of dynamic membrane filtering is 60 ~ 150L/ (m
2.d).
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| CN201410557374.3A CN104276730A (en) | 2014-10-20 | 2014-10-20 | Efficient intensive nitrogen and phosphorus removal sewage treatment process |
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Citations (7)
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-
2014
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|---|---|---|---|---|
| US5480548A (en) * | 1993-12-28 | 1996-01-02 | Ch2M Hill, Inc. | Wastewater biological phosphorus removal process |
| KR20030047009A (en) * | 2001-12-07 | 2003-06-18 | (주)수엔지니어링 & 컨설팅 | Step-feed intermittent aeration system for carbon, nitrogen, phosphorus removal |
| CN101863590A (en) * | 2010-06-17 | 2010-10-20 | 同济大学 | Combined anoxic/aerobic enhanced biological activated carbon dynamic membrane nitrogen and phosphorus removal process |
| CN102417273A (en) * | 2011-10-10 | 2012-04-18 | 北京建筑工程学院 | Dynamic membrane purifying reactor and method for removing ammonia nitrogen and organic matters from reclaimed water |
| CN102417250A (en) * | 2011-10-10 | 2012-04-18 | 北京建筑工程学院 | Dynamic membrane purification reactor and method for removing phosphorus from regenerated water |
| CN203653394U (en) * | 2014-01-14 | 2014-06-18 | 江苏裕隆环保有限公司 | Nitrogen and phosphorus removal device by step feed A/O MBBR process coupled with cloth filter |
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