CN204251470U - Based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls - Google Patents
Based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls Download PDFInfo
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- CN204251470U CN204251470U CN201420707507.6U CN201420707507U CN204251470U CN 204251470 U CN204251470 U CN 204251470U CN 201420707507 U CN201420707507 U CN 201420707507U CN 204251470 U CN204251470 U CN 204251470U
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 85
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 85
- 239000001301 oxygen Substances 0.000 title claims abstract description 85
- 238000010992 reflux Methods 0.000 title claims abstract description 71
- 239000011259 mixed solution Substances 0.000 title claims abstract description 61
- 230000000694 effects Effects 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 6
- 238000004065 wastewater treatment Methods 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 244000005700 microbiome Species 0.000 description 12
- 238000006396 nitration reaction Methods 0.000 description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 238000013019 agitation Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 230000036284 oxygen consumption Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)
Abstract
The utility model relates to a kind of strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen, belongs to technical field of sewage.The mixed solution internal reflux system comprising anoxic pond, Aerobic Pond, the oxygen pond that disappears, rear Aerobic Pond and be arranged on anoxic pond and disappear between oxygen pond, wherein anoxic pond is connected with Aerobic Pond, and Aerobic Pond is connected with the oxygen pond that disappears, and the oxygen pond that disappears is connected with rear Aerobic Pond.The common problem that the dissolved oxygen that the utility model carries for internal reflux mixed solution in maximum discharge standard urban wastewater treatment firm production run reality can cause process system denitrification efficiency to reduce, by arranging the oxygen pond that disappears after traditional Aerobic Pond, utilize the oxygen-consuming capacity of mud to eliminate internal reflux mixed solution dissolved oxygen, realize making full use of and reinforcing process denitrogenation of carbon source.Compared with general strengthened denitrification method, the utility model has the advantages such as utilization of carbon source rate is high, strengthened denitrification potentiality large, design and operation method is simple, production run cost is low, effect of energy is remarkable.
Description
Technical field
The utility model relates to a kind of strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen, belongs to technical field of sewage.
Background technology
Under existing engineering design method, during maximum discharge standard sewage treatment plant runs, ubiquity internal reflux mixed solution carries dissolved oxygen and enters the practical problems that anoxic pond causes process system denitrification efficiency to decline.In general, under internal reflux ratio 200% and Aerobic Pond end DO concentration are the condition of 2mg/L, the DO that internal reflux mixed solution carries can make process system denitrification ability decline 1.4mg/L, and the height of mixed solution internal reflux ratio and Aerobic Pond end dissolved oxygen concentration directly determines the influence degree of internal reflux mixed solution to process system denitrification efficiency.According to investigations, most sewage work of current China Aerobic Pond end DO concentration is generally at 2-5mg/L, visible, the DO that internal reflux mixed solution carries is remarkable to the disadvantageous effect of technique denitrification efficiency, and then affects the stably reaching standard of maximum discharge standard urban wastewater treatment firm and save energy and reduce the cost.
At present, based on reinforcing process denitrogenation, for reducing internal reflux mixed solution to the disadvantageous effect of technique denitrification efficiency, usually the technical measures taked in the engineering design and production run of maximum discharge standard urban wastewater treatment firm are included in after filler adds district and arrange degas zone, reduce Aerobic Pond latter end aeration rate etc., Aerobic Pond latter end DO concentration is controlled about 2mg/L (consideration prevents second pond anaerobism and causes Mud up-floating), but the internal reflux mixed solution of 2mg/LDO is still remarkable to the disadvantageous effect of technique denitrogenation under higher internal reflux ratio, the disadvantageous effect that prior art measure is difficult to fundamentally to eliminate internal reflux mixed solution DO and produces technique denitrogenation is described, the internal reflux mixed solution of higher concentration DO can only be alleviated to a certain extent to the disadvantageous effect of technique denitrogenation.
Because Aerobic Pond end active mud has stronger oxygen-consuming capacity under certain hydraulic detention time, therefore, for eliminating internal reflux mixed solution DO to the disadvantageous effect of technique denitrogenation, can take to arrange after traditional Aerobic Pond and disappear oxygen pond and internal reflux point be arranged on the technical measures of the oxygen pond end that disappears, simultaneously for preventing second pond anaerobism from causing Mud up-floating, Aerobic Pond after arranging again after the oxygen pond that disappears.
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art, a kind of strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen is provided, by arranging the oxygen pond that disappears after traditional Aerobic Pond, utilize the oxygen-consuming capacity of mud self to eliminate internal reflux mixed solution dissolved oxygen, solve the internal reflux mixed solution DO existed in current maximum discharge standard urban wastewater treatment firm production run reality produces remarkable disadvantageous effect common problem to technique denitrification efficiency.
According to the technical scheme that the utility model provides, the described strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen, it is characterized in that: comprise anoxic pond, Aerobic Pond, disappear oxygen pond and rear Aerobic Pond, anoxic pond is connected with Aerobic Pond, Aerobic Pond is connected with the oxygen pond that disappears, and the oxygen pond that disappears is connected with rear Aerobic Pond; Internal reflux point is set at the described end disappearing oxygen pond, anoxic pond and disappear between oxygen pond and connect mixed solution internal reflux system.
Further, described mixed solution internal reflux system is internal reflux pipeline and internal reflux pump.
Further, described in disappear after oxygen pond is arranged on Aerobic Pond, the useful volume in the oxygen pond that disappears is 1/8 ~ 1/4 of anoxic pond useful volume.
Further, after described rear Aerobic Pond is arranged on the oxygen pond that disappears, the useful volume of rear Aerobic Pond is 1/8 ~ 1/4 of anoxic pond useful volume.
Further, described anoxic pond and Aerobic Pond are circular groove type pond, and the oxygen pond that disappears is pulling flow type or completely hybrid, and rear Aerobic Pond is pulling flow type.
Further, submersible agitator is set in described anoxic pond and the oxygen pond that disappears, independent aerating system is set in Aerobic Pond and rear Aerobic Pond.
The utility model has the following advantages and positively effect:
(1) the utility model disappears oxygen pond and strengthened denitrification method mixed solution internal reflux being selected reach can solve internal reflux mixed solution dissolved oxygen in the production run of current maximum discharge standard urban wastewater treatment firm and technique denitrification efficiency produced to the practical problems of remarkable disadvantageous effect by arranging after traditional Aerobic Pond;
(2) the utility model is by the Dissolved Oxygen concentration Control of Aerobic Pond at about 1mg/L, is conducive to the design hydraulic detention time in disappear oxygen load and the oxygen pond that disappears reducing the follow-up oxygen pond that disappears;
(3) compared with general strengthened denitrification method, the utility model has that utilization of carbon source rate is high, strengthened denitrification potentiality are large, design and operation method is simple, production run low cost and other advantages, and the engineering design and the operational management that can be China's maximum discharge standard urban wastewater treatment firm provide new approaches;
(4) the utility model specific aim and workable, can solve the deficiency of existing Engineering of Sewage Treatment Plant method of design, to the stably reaching standard of low ratio of carbon to ammonium and maximum discharge standard sewage treatment plant with energy-saving and cost-reducingly to have important practical significance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of strengthened denitrification system described in the utility model.
Embodiment
Below in conjunction with concrete accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: the described strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen comprises anoxic pond 1, Aerobic Pond 2, the oxygen pond 3 that disappears, rear Aerobic Pond 4, mixed solution internal reflux system 5, anaerobic pond water outlet 6, Aerobic Pond water outlet 7 etc.
As shown in Figure 1, the utility model comprises anoxic pond 1, Aerobic Pond 2, disappear oxygen pond 3 and rear Aerobic Pond 4, and anoxic pond 1 is connected with Aerobic Pond 2, and Aerobic Pond 2 is connected with the oxygen pond 3 that disappears, and the oxygen pond 3 that disappears is connected with rear Aerobic Pond 4; Arrange internal reflux point at the described end disappearing oxygen pond 3, anoxic pond 1 and disappear between oxygen pond 3 and connect mixed solution internal reflux system 5, mixed solution internal reflux system 5 is internal reflux pipeline and internal reflux pump;
After the described oxygen pond 3 that disappears is arranged on Aerobic Pond 2, the useful volume in the oxygen pond 3 that disappears is 1/8 ~ 1/4 of anoxic pond 1 useful volume;
After described rear Aerobic Pond 4 is arranged on the oxygen pond 3 that disappears, the useful volume of rear Aerobic Pond 4 is 1/8 ~ 1/4 of anoxic pond 1 useful volume;
Described anoxic pond 1 and Aerobic Pond 2 are circular groove type pond, and the oxygen pond 3 that disappears is for pulling flow type or completely hybrid, and rear Aerobic Pond 4 is pulling flow type;
In described anoxic pond 1 and the oxygen pond 3 that disappears, arrange submersible agitator, in Aerobic Pond 2 and rear Aerobic Pond 4, arrange independent aerating system, the operation being convenient to dissolved oxygen controls;
Described Aerobic Pond 2, disappear oxygen pond 3 and rear Aerobic Pond 4 can be arranged separately, also can build jointly;
The described oxygen pond 3 that disappears is determined according to maximum mixed-liquor return amount and sludge reflux amount sum with the volume size of rear Aerobic Pond 4.
Embodiment one: a kind of strengthened denitrification method controlled based on internal reflux mixed solution dissolved oxygen, comprises the following steps:
A, through internal reflux system 5 reflux 100% internal reflux mixed solution enter anoxic pond 1 together with the anaerobic pond water outlet 6 of 150%, stop 4 hours under anoxic and agitation condition, under microorganism (MLSS is 3-4g/L) effect, carry out anti-nitration reaction and denitrogenation; Wherein 100% is the ratio of internal reflux mixed solution flow and flooding velocity; 200% is the ratio of anaerobic pond water flow and flooding velocity;
B, step a gained anoxic pond mixed solution enter Aerobic Pond 2, stop 8 hours under aerobic condition, and under microorganism (MLSS is 3g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction, the DO concentration of Aerobic Pond 2 controls at 1mg/L simultaneously;
C, step b gained Aerobic Pond mixed solution enter the oxygen pond 3 that disappears, stop 30 minutes under agitation, under microorganism (MLSS is 3g/L) effect, carry out oxygen consumption effect to disappear oxygen, after the oxygen that disappears completes, the mixed solution of 100% refluxes as internal reflux mixed solution at oxygen pond 3 end that disappears;
The disappear remainder of oxygen pond mixed solution of d, step c gained enters rear Aerobic Pond 4, stop 30 minutes under aerobic condition, under microorganism (MLSS is 3g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction further, simultaneously, the DO concentration of Aerobic Pond 4 controls at 2mg/L;
E, rear Aerobic Pond water outlet 7 enter second pond as second pond and carry out mud-water separation.
Embodiment two: a kind of strengthened denitrification method controlled based on internal reflux mixed solution dissolved oxygen, comprises the following steps:
A, through internal reflux system 5 reflux 300% internal reflux mixed solution enter anoxic pond 1 together with the anaerobic pond water outlet 6 of 200%, stop 4 hours under anoxic and agitation condition, under microorganism (MLSS is 4g/L) effect, carry out anti-nitration reaction and denitrogenation; Wherein 300% is the ratio of internal reflux mixed solution flow and flooding velocity; 200% is the ratio of anaerobic pond water flow and flooding velocity;
B, step a gained anoxic pond mixed solution enter Aerobic Pond 2, stop 9 hours under aerobic condition, and under microorganism (MLSS is 4g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction, the DO concentration of Aerobic Pond 2 controls at 1mg/L simultaneously;
C, step b gained Aerobic Pond mixed solution enter the oxygen pond 3 that disappears, stop 60 minutes under agitation, under microorganism (MLSS is 4g/L) effect, carry out oxygen consumption effect to disappear oxygen, after the oxygen that disappears completes, the mixed solution of 300% refluxes as internal reflux mixed solution at oxygen pond 3 end that disappears;
The disappear remainder of oxygen pond mixed solution of d, step c gained enters rear Aerobic Pond 4, stop 60 minutes under aerobic condition, under microorganism (MLSS is 4g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction further, simultaneously, the DO concentration of Aerobic Pond 4 controls at 2mg/L;
E, rear Aerobic Pond water outlet 7 enter second pond as second pond and carry out mud-water separation.
Embodiment three: a kind of strengthened denitrification method controlled based on internal reflux mixed solution dissolved oxygen, comprises the following steps:
A, through internal reflux system 5 reflux 200% internal reflux mixed solution enter anoxic pond 1 together with the anaerobic pond water outlet 6 of 200%, stop 4 hours under anoxic and agitation condition, under microorganism (MLSS is 3g/L) effect, carry out anti-nitration reaction and denitrogenation; Wherein 200% is the ratio of internal reflux mixed solution flow and flooding velocity; 200% is the ratio of anaerobic pond water flow and flooding velocity;
B, step a gained anoxic pond mixed solution enter Aerobic Pond 2, stop 9 hours under aerobic condition, under microorganism (MLSS is 3g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction, the DO concentration of Aerobic Pond 2 controls at about 1mg/L simultaneously;
C, step b gained Aerobic Pond mixed solution enter the oxygen pond 3 that disappears, stop 45 minutes under agitation, under microorganism (MLSS is 3g/L) effect, carry out oxygen consumption effect to disappear oxygen, after the oxygen that disappears completes, the mixed solution of 200% refluxes as internal reflux mixed solution at oxygen pond 3 end that disappears;
The disappear remainder of oxygen pond mixed solution of d, step c gained enters rear Aerobic Pond 4, stop 60 minutes under aerobic condition, under microorganism (MLSS is 3g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction further, simultaneously, the DO concentration of Aerobic Pond 4 controls at about 2mg/L;
E, rear Aerobic Pond water outlet 7 enter second pond as second pond and carry out mud-water separation.
Claims (6)
1. the strengthened denitrification system controlled based on internal reflux mixed solution dissolved oxygen, it is characterized in that: comprise anoxic pond (1), Aerobic Pond (2), disappear oxygen pond (3) and rear Aerobic Pond (4), anoxic pond (1) is connected with Aerobic Pond (2), Aerobic Pond (2) is connected with the oxygen pond (3) that disappears, and the oxygen pond (3) that disappears is connected with rear Aerobic Pond (4); Internal reflux point is set at the described end disappearing oxygen pond (3), anoxic pond (1) and disappear between oxygen pond (3) and connect mixed solution internal reflux system (5).
2., as claimed in claim 1 based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls, it is characterized in that: described mixed solution internal reflux system (5) is internal reflux pipeline and internal reflux pump.
3. as claimed in claim 1 based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls, it is characterized in that: described in disappear after oxygen pond (3) is arranged on Aerobic Pond (2), the useful volume in the oxygen pond (3) that disappears is 1/8 ~ 1/4 of anoxic pond (1) useful volume.
4. as claimed in claim 1 based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls, it is characterized in that: after described rear Aerobic Pond (4) is arranged on the oxygen pond (3) that disappears, the useful volume of rear Aerobic Pond (4) is 1/8 ~ 1/4 of anoxic pond (1) useful volume.
5. as claimed in claim 1 based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls, it is characterized in that: described anoxic pond (1) and Aerobic Pond (2) are circular groove type pond, disappear oxygen pond (3) for pulling flow type or completely hybrid, and rear Aerobic Pond (4) is pulling flow type.
6. as claimed in claim 1 based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls, it is characterized in that: submersible agitator is set in described anoxic pond (1) and the oxygen pond (3) that disappears, independent aerating system is set in Aerobic Pond (2) and rear Aerobic Pond (4).
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| CN201420707507.6U CN204251470U (en) | 2014-11-21 | 2014-11-21 | Based on the strengthened denitrification system that internal reflux mixed solution dissolved oxygen controls |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326632A (en) * | 2014-11-21 | 2015-02-04 | 中国市政工程华北设计研究总院有限公司 | Enhanced denitrification system and method based on internal reflux mixed solution dissolved oxygen control |
| CN108083437A (en) * | 2018-01-02 | 2018-05-29 | 江苏裕隆环保有限公司 | A kind of rural domestic sewage treating device and treatment process |
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- 2014-11-21 CN CN201420707507.6U patent/CN204251470U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326632A (en) * | 2014-11-21 | 2015-02-04 | 中国市政工程华北设计研究总院有限公司 | Enhanced denitrification system and method based on internal reflux mixed solution dissolved oxygen control |
| CN108083437A (en) * | 2018-01-02 | 2018-05-29 | 江苏裕隆环保有限公司 | A kind of rural domestic sewage treating device and treatment process |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150408 |
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