CN204125308U - A kind of A 2o-BAF combination process pilot plant - Google Patents
A kind of A 2o-BAF combination process pilot plant Download PDFInfo
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- CN204125308U CN204125308U CN201420689458.8U CN201420689458U CN204125308U CN 204125308 U CN204125308 U CN 204125308U CN 201420689458 U CN201420689458 U CN 201420689458U CN 204125308 U CN204125308 U CN 204125308U
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Abstract
The utility model discloses a kind of A
2o-BAF combination process pilot plant, comprise connect successively water inlet bucket, anaerobic pond, anoxic pond, in short-term Aerobic Pond, settling tank, middle bucket, BAF and back flushing bucket; Be connected with anaerobic pond by mud return line bottom described settling tank, back flushing bucket is connected with anoxic pond by nitrification liquid return line, and back flushing bucket is connected with BAF by backwash tube; BAF is divided into water distribution layer, supporting layer, filter material layer and Super High from the bottom to top, and the volume ratio of anaerobic pond, anoxic pond, in short-term Aerobic Pond is 1:2:1.The utility model adopts anaerobic/anoxic/aerobic-BAF (A in short-term
2o-BAF) combination process, by anaerobic pond, anoxic pond and in short-term Aerobic Pond three reaction tanks jointly build jointly form A
2o pond, adopts independently BAF (BAF) to complete nitrification, can realize multiple pollutant and synchronously remove; Have that effluent quality is good, floor space is little, running cost is low and the advantage such as sludge yield is low.
Description
Technical field
The utility model belongs to environmental technology field, relates to a kind of biological sewage treatment device, is specifically related to a kind of anaerobic/anoxic/aerobic-BAF (A in short-term
2o-BAF) combination process pilot plant.
Background technology
Along with the fast development of China's urbanization, a lot of Sewage Plant faces the pressure that processing power increases, emission standard improves; Meanwhile, the occupation of land of Sewage Plant and running cost face again strict restriction.But there is the problems such as energy consumption is large, carbon source consumption is large, sludge yield is high, running cost is high in domestic and international existing cities and towns biological dephosphorize denitrification technique.Therefore, need the requirement according to Towns in a certain region sewage quality feature and energy-saving and emission-reduction at present badly, research and develop efficient urban wastewater treatment new technology.
Denitrifying Phosphorus Removal Technology is a kind of effective ways of transformation sewage treatment process.Compared with the aerobic dephosphorization process of tradition, denitrification dephosphorization bacterium can save the carbon source of about 50%, the oxygen requirement of 30%, reduces by the sludge yield of 50% simultaneously.Denitrifying phosphorus removal technique generally adopts two sludge system, and denitrifying phosphorus removing bacteria is present in Sludge System, and nitrifier separately exists in fixed-film biological reactor or aerobic nitrification sbr reactor device.DEPHANOX technique is a kind of typical two sludge system, but this technique HRT is long, and flow process is complicated, and TN removal effect is undesirable.In order to develop the denitrifying phosphorus removal technique of more simple and effective, studies in China person is by BAF and A
2o technique combines, adjustment A
2the processing parameter of O, and take full advantage of the advantages such as BAF occupation of land is little, nitrification effect good, strong shock resistance.
Two mud method denitrifying phosphorus removal technique is research in recent years focus, but existing research is handling object mainly with simulated wastewater or community life sewage greatly, larger with actual town sewage water quality difference; Treatment unit scale is general less, and influent quality, BAF filtrate type and processing parameter are different, and technology is still immature, is difficult to through engineering approaches application.
Utility model content
In order to overcome the deficiency that above prior art exists, the utility model provides a kind of anaerobic/anoxic/aerobic-BAF (A in short-term
2o-BAF) combination process pilot plant, it with Typical Towns sewage for handling object, activated sludge process and technology of biological membrane are combined, the volume of strict control anaerobic pond, anoxic pond and Aerobic Pond in short-term, and design is optimized to BAF, the efficient process to town sewage can be realized, carry mark upgrading for urban wastewater treatment firm and provide effect technique reference.
The purpose of this utility model is achieved through the following technical solutions: a kind of A
2o-BAF combination process pilot plant, comprises into water bucket and the anaerobic pond be connected successively with it, anoxic pond, in short-term Aerobic Pond, settling tank, middle bucket, BAF and back flushing bucket; Anaerobic pond, anoxic pond and in short-term Aerobic Pond be respectively equipped with agitator, plate-type aerator is provided with in short-term bottom Aerobic Pond and BAF, each plate-type aerator is connected with air pump respectively, be connected with anaerobic pond by mud return line bottom described settling tank, back flushing bucket is connected with anoxic pond by nitrification liquid return line, and back flushing bucket is connected with BAF by backwash tube; BAF is divided into water distribution layer, supporting layer, filter material layer and Super High from the bottom to top, and described filter material layer is filled with ceramic grain filter.
A described in the utility model
2o-BAF combination process pilot plant, is further characterized in that:
The volume ratio of described anaerobic pond anoxic pond, in short-term Aerobic Pond is 1:2:1, and described three reaction tanks employing is built form jointly and jointly formed A
2o pond.
Described settling tank adopts tube settler structure formation, and inclined tube pitch angle is 60 °, and surface load is 1.2m
3/ (m
2h).
Described BAF totally 2, every diameter 0.6m, total height 3.0m, described water distribution layer height 0.4m, supporting layer height 0.8m, height of filter media layer 1.35m, Super High height 0.45m; Adopt ceramic grain filter, diameter 3-5mm, porosity 50%.
The utility model A
2o-BAF combination process pilot plant, has following advantage relative to prior art:
1, it adopts independently BAF (BAF) to complete nitrification, and ammonia nitrogen removal is respond well; BAF floor space is less in addition, and sludge yield is low.
2, BAF water outlet is back to anoxic pond as nitrification liquid, increases the volume of anoxic pond simultaneously, enhance denitrification dephosphorization effect, improve the utilising efficiency of carbon source in sewage, decrease external carbon addition amount, improve the removal effect of total nitrogen and total phosphorus.
3, Aerobic Pond small volume in short-term, HRT controls at about 1h, can complete aerobic dephosphorization function; Because its nitrification is limited, avoid the impact on biological phosphor-removing effect; The HRT total because of system shortens, and floor space reduces, and also obviously reduces sludge yield.
Accompanying drawing explanation
Fig. 1 is the utility model A
2the structural representation of o-BAF combination process pilot plant;
Fig. 2 is the removal effect figure of the utility model application test to COD;
Fig. 3 is the removal effect figure of the utility model application test to ammonia nitrogen;
Fig. 4 is the removal effect figure of the utility model application test to total nitrogen;
Fig. 5 is the removal effect figure of the utility model application test to total phosphorus;
Fig. 6 is the removal effect figure of the utility model application test to SS.
In figure, 1. intake bucket, 2. anaerobic pond, 3. anoxic pond, 4. Aerobic Pond, 5. settling tank in short-term, 6. middle bucket, 7. BAF, 8. back flushing bucket, 9. water inlet pipe, 10. mud return line, 11. nitrification liquid return lines, 12. backwash tubes, 13. water pumps, 14. agitators, 15. plate-type aerators, 16. air pumps.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
The utility model A
2o-BAF combination process pilot plant, as shown in Figure 1, comprises into water bucket 1 and the anaerobic pond 2 be connected successively with it, anoxic pond 3, in short-term Aerobic Pond 4, settling tank 5, middle bucket 6, BAF 7 and back flushing bucket 8; Anaerobic pond 2, anoxic pond 3 and in short-term Aerobic Pond 4 be respectively equipped with agitator 14, plate-type aerator 15 is provided with in short-term bottom Aerobic Pond 4 and BAF 7, each plate-type aerator 15 is connected with air pump 16 respectively, be connected with anaerobic pond 2 by mud return line 10 bottom described settling tank 5, back flushing bucket 8 is connected with anoxic pond 3 by nitrification liquid return line 11, and back flushing bucket 8 is connected with BAF 7 by backwash tube 12.
At A
2in o-BAF pilot plant, A
2o pond comprises anaerobic pond 2, anoxic pond 3 and Aerobic Pond 4, BAF pond and BAF 7 in short-term.The pilot plant process water yield is 20m
3/ d.A
2o pond HRT is 4.0h, and wherein, the HRT of anaerobic pond 2 is 1.0h, and the HRT of anoxic pond 3 is 2.0h, and the HRT of Aerobic Pond 4 is 1.0h in short-term.A
2o pond mud age is 23d, and return sludge ratio is 100%.The DO of Aerobic Pond controls at 1.0-2.0mg/L in short-term.Settling tank 5 adopts tube settler structure formation, and inclined tube pitch angle is 60 °, and surface load is 1.2m
3/ (m
2h).
BAF 7 totally 2, every diameter 0.6m, total height 3.0m, be divided into water distribution layer, supporting layer, filter material layer and Super High from the bottom to top, water distribution layer height 0.4m, supporting layer height 0.8m, height of filter media layer 1.35m, Super High height 0.45m; Useful volume 0.79m
3, filter material layer volume 0.38m
3; Filter material layer filling adopts ceramic grain filter, diameter 3 ~ 5mm, porosity 50%.The filtering velocity in filter tank is 1.43m
3/ (m
2h), empty bed HRT is 1.2h, nitrated load 0.4kgNH
4 +-N/ (m
3d).Mixed liquid recycle ratio is 100%, DO concentration 4-6mg/L; Backwashing period is 5 ~ 7 days, each air purge 10min, and air water combines flushing 3min, washes 3min separately; Air purge intensity is 17.70 L/ (m
2s), water backwash rate is 8.85 L/ (m
2s).
The utility model A
2the working process of o-BAF combination process pilot plant is:
(1) sewage of intaking in bucket 1, under the effect of water pump 13, enters anaerobic pond 2 through water inlet pipe 9; Under agitator 14 acts on, sewage fully mixes with mud, and dirty Organic substance in water is fully absorbed by anaerobic pond 2 mud and stores, and in mud, portion phosphate is released simultaneously.
(2) mixed solution of anaerobic pond 2 flows into anoxic pond 3 by overflow weir, and the nitrification liquid (water outlet containing nitrate) that BAF 7 produces also is back to anoxic pond 3 through nitrification liquid return line 11; Under agitator 14 acts on, nitrification liquid fully mixes with mud, and the mud in anoxic pond 3 utilizes the organism stored in body by the nitrate reduction in sewage, and the phosphoric acid salt in simultaneously stability sewage, realizes denitrification dephosphorization effect.
(3) mixed solution of anoxic pond 3 flows into Aerobic Pond 4 in short-term by overflow weir, air pump 16 by plate-type aerator 15 for Aerobic Pond 4 in short-term carries out aeration, agitator 14 make in short-term in Aerobic Pond 4 mixed solution keep suspended state; Under aerobic condition, in sewage, remaining phosphoric acid salt is removed, and remaining organism is decomposed, and simultaneously because aerobic HRT is shorter, aerobic nitrification effect is suppressed.
(4) Aerobic Pond 4 mixed solution enters settling tank 5 by overflow in short-term, and settling tank 5 adopts tube settler structure formation, completes mud-water separation at settling tank 5; Supernatant liquor enters middle bucket 6 by overflow, and base sludge, under the effect of water pump 13, is back to anaerobic pond 2 by mud return line 10.
(5) water that in the middle of, bucket 6 stores is transported to BAF 7 by water pump 13, and BAF 7 inside is filled with ceramic grain filter, haydite surface attachment microbial film, and under aerobic condition, ammonia nitrogen in sewage is oxidized to nitrate nitrogen by microbial film; BAF 7 water outlet imports back flushing bucket 8, and the water that back flushing bucket 8 stores is back to anoxic pond 3 by nitrification liquid return line 11.
(6) when needs carry out back flushing to BAF 7, the water utilizing water pump 13 to be stored by back flushing bucket 8 is transported to bottom BAF 7 by back flushing water pipe 12, washes ceramic grain filter; Meanwhile, utilize air pump 16 for BAF 7 aeration, carry out air purge.
Test 1:
Adopt the utility model pilot plant, carry out validity check:
Test the distributing well that former water takes from Shenzhen Sewage Plant, influent quality is as shown in table 1.
Influent quality tested by table 1
| Index | Scope (mg/L) | Mean value (mg/L) |
| COD | 120～587 | 249 |
| SS | 37～244 | 108.33 |
| TN | 11～70 | 40 |
| NH 3-N | 12～59 | 29 |
| TP | 0.5～1.9 | 1.1 |
Processing condition: the process water yield is 20m
3/ d, A
2o pond HRT is 4.0h, and mud age is 23d, and return sludge ratio is 100%, and the DO of aerobic section controls at 1.0-2.0mg/L.Settling tank 5 adopts tube settler structure formation, and surface load is 1.2m
3/ (m
2h).The empty bed HRT of BAF 7 is 1.2h, nitrated load 0.4 kgNH
4 +-N/ (m
3d), mixed liquid recycle ratio is 100%, DO concentration is 4-6mg/L.
1, COD removal effect
Pilot test system is to COD
crtreatment effect, as shown in Figure 2, influent COD
crbe 120.00 ~ 586.67mg/L, average 248.75mg/L, aqueous concentration remains on below 50mg/L substantially, and average aqueous concentration is 28.44mg/L, average removal rate 88.57%.As seen from the figure, although influent COD
crthere is obviously fluctuation in concentration, but A
2o-BAF system is to COD
crremoval effect keep stable.
2, ammonia nitrogen and total nitrogen removal effect
Duration of test ammonia nitrogen and total nitrogen removal effect, as shown in Figure 3 and Figure 4, influent ammonium concentration is between 11.52 ~ 58.61mg/L, and average out to 28.77mg/L, aqueous concentration remains on below 8mg/L, and mean concns is 2.63mg/L, average removal rate 90.87%.Water inlet total nitrogen concentration is between 10.97 ~ 69.96mg/L, and mean concns 40.37mg/L, water outlet total nitrogen is 9.51mg/L, average removal rate 76.45%.Visible, although influent ammonia nitrogen and total nitrogen concentration fluctuation are comparatively greatly, pilot test system removal effect is comparatively stable.
3, dephosphorization characteristics
Pilot plant to the removal capacity of total phosphorus as shown in Figure 5, stable operation stage, water inlet total phosphorus at 0.49 ~ 1.88mg/L, mean concns 1.04mg/L, final outflow water total phosphorus is 0.42mg/L, and average removal rate rises to 59.62%, and water outlet can meet the standard of drainage of country-level A.
4, SS removal behavior
Pilot plant is to the removal capacity of SS, and as shown in Figure 6, SS is between 37 ~ 244mg/L in water inlet, mean concns is 108.33mg/L, removal effect kept stable, and settling tank water outlet SS mean concns is 48.30mg/L, final BAF water outlet SS is 9.21mg/L, SS average removal rate is 91%.A
2o-BAF pilot test system medium sediment pool has taken into account sludge reflux and BAF water inlet SS control overflow, and its design surface load is 1.2m
3/ (m
2h), slightly higher than general second pond, therefore water outlet SS is also higher; After BAF filteration, water outlet SS can be down to below 10mg/L, but wants often to carry out back flushing to BAF, and backwashing period is 5-7 days.
Above-mentioned embodiment is preferred embodiment of the present utility model; can not limit the utility model; the any of other does not deviate from the technical solution of the utility model and the substitute mode of the change made or other equivalence, is included within protection domain of the present utility model.
Claims (4)
1. an A
2o-BAF combination process pilot plant, comprises into water bucket (1) and the anaerobic pond (2) be connected successively with it, anoxic pond (3), in short-term Aerobic Pond (4), settling tank (5), middle bucket (6), BAF (7) and back flushing bucket (8), anaerobic pond (2), anoxic pond (3) and in short-term Aerobic Pond (4) are respectively equipped with agitator (14), Aerobic Pond (4) and BAF (7) bottom are provided with plate-type aerator (15) in short-term, each plate-type aerator (15) is connected with air pump (16) respectively, it is characterized in that: described settling tank (5) bottom is connected with anaerobic pond (2) by mud return line (10), back flushing bucket (8) is connected with anoxic pond (3) by nitrification liquid return line (11), back flushing bucket (8) is connected with BAF (7) by backwash tube (12), BAF (7) is divided into water distribution layer, supporting layer, filter material layer and Super High from the bottom to top, and described filter material layer is filled with ceramic grain filter.
2. A according to claim 1
2o-BAF combination process pilot plant, is characterized in that: described anaerobic pond (2), anoxic pond (3), the in short-term volume ratio of Aerobic Pond (4) are 1:2:1, and described three reaction tanks employing is built form jointly and jointly formed A
2o pond.
3. A according to claim 1
2o-BAF combination process pilot plant, is characterized in that: described settling tank (5) adopts tube settler structure formation, and inclined tube pitch angle is 60 °, and surface load is 1.2m
3/ (m
2h).
4. A according to claim 1
2o-BAF combination process pilot plant, is characterized in that: described BAF (7) totally 2, every diameter 0.6m, total height 3.0m, described water distribution layer height 0.4m, supporting layer height 0.8m, height of filter media layer 1.35m, Super High height 0.45m; Adopt ceramic grain filter, diameter 3 ~ 5mm, porosity 50%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569762A (en) * | 2018-05-09 | 2018-09-25 | 江苏大楚环保设备有限公司 | A kind of multifunctional all domestic sewage treatment device |
| CN114044612A (en) * | 2021-11-23 | 2022-02-15 | 中化学朗正环保科技有限公司 | Integrated sewage treatment system and treatment method thereof |
-
2014
- 2014-11-17 CN CN201420689458.8U patent/CN204125308U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108569762A (en) * | 2018-05-09 | 2018-09-25 | 江苏大楚环保设备有限公司 | A kind of multifunctional all domestic sewage treatment device |
| CN114044612A (en) * | 2021-11-23 | 2022-02-15 | 中化学朗正环保科技有限公司 | Integrated sewage treatment system and treatment method thereof |
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