CN104341043A - System for enhanced denitrification with inner reflux mixing liquid type oxygen removal pool and method - Google Patents
System for enhanced denitrification with inner reflux mixing liquid type oxygen removal pool and method Download PDFInfo
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- CN104341043A CN104341043A CN201410662992.4A CN201410662992A CN104341043A CN 104341043 A CN104341043 A CN 104341043A CN 201410662992 A CN201410662992 A CN 201410662992A CN 104341043 A CN104341043 A CN 104341043A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
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Abstract
The invention relates to a system for enhanced denitrification with an inner reflux mixing liquid type oxygen removal pool and a method, and belongs to the technical field of sewage treatment. The system mainly comprises an anaerobic pool, an aerobic pool and the inner reflux mixing liquid type oxygen removal pool, wherein the anaerobic pool is connected with the aerobic pool, the aerobic pool is connected with the inner reflux mixing liquid type oxygen removal pool through an inner reflux pump and a mixing liquid inner reflux pipeline, and the inner reflux mixing liquid type oxygen removal pool is connected with the anaerobic poll through the mixing liquid inner reflux pipeline. The system and the method aim at solving the problem of decrease of process denitrification efficiency caused by the dissolved oxygen in the inner reflux mixing liquid during the actual running of urban sewage treatment plants with high drainage standards; the inner reflux mixing liquid type oxygen removal pool is arranged on an inner reflux path of the inner reflux mixing liquid, and the dissolved oxygen in the inner reflux mixing liquid is removed by the self oxygen consumption capability of activated sludge, so the effects of enhanced denitrification, energy saving and energy consumption decrease are realized. The system and the method have the advantages that the utilization rate of carbon sources is high, the enhanced denitrification function is obvious, the designed running method is simple, the production running cost is low, and the like.
Description
Technical field
The present invention relates to a kind of internal reflux mixed solution that arranges to disappear the strengthened denitrification system and method in oxygen pond, belong to technical field of sewage.
Background technology
Under existing engineering design method, certain dissolved oxygen can be carried while internal reflux mixed solution directly enters anoxic pond by internal reflux system during maximum discharge standard sewage treatment plant runs to enter together, the dissolved oxygen carried once enter the rapid water-inlet carbon source consumed in anoxic pond of anoxic pond meeting, and then affects the denitrification effect of anoxic pond and the denitrification efficiency of process system.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 decides internal reflux mixed solution to the denitrifying influence degree of anoxic pond.And 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 on the impact of technique denitrification efficiency significantly, and then affects the stably reaching standard of maximum discharge standard urban wastewater treatment firm and saves 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., so that Aerobic Pond latter end DO concentration is controlled at about 2mg/L, 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.
Therefore, for eliminating internal reflux mixed solution DO to the disadvantageous effect of technique denitrogenation, should take technical measures that internal reflux mixed solution DO concentration is down to 0mg/L.And Aerobic Pond end active mud mixed liquid can utilize the oxygen-consuming capacity of mud self to realize higher DO removal amount under certain hydraulic detention time, the reduction that can be maximum discharge standard urban wastewater treatment firm internal reflux mixed solution DO concentration provides condition.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of internal reflux mixed solution that arranges is provided to disappear the strengthened denitrification system and method in oxygen pond, return flow path by the internal reflux mixed solution between anoxic pond and Aerobic Pond is arranged internal reflux mixed solution to disappear oxygen pond, at utmost reduce internal reflux mixed solution DO concentration.
According to technical scheme provided by the invention, the described internal reflux mixed solution that arranges disappears the strengthened denitrification system in oxygen pond, it is characterized in that: comprise anoxic pond, Aerobic Pond and internal reflux mixed solution and to disappear oxygen pond, anoxic pond is connected with Aerobic Pond, internal reflux pump is set in Aerobic Pond, Aerobic Pond to be connected internal reflux mixed solution by internal reflux pump and to disappear oxygen pond with mixed solution internal reflux pipeline, the internal reflux mixed solution oxygen pond that disappears connects anoxic pond by mixed solution internal reflux pipeline.
Further, described anoxic pond connects anaerobic pond water outlet; Described Aerobic Pond connects Aerobic Pond water outlet.
Further, the described internal reflux mixed solution oxygen pond that disappears is arranged on the return flow path of the internal reflux mixed solution between anoxic pond and Aerobic Pond, and the disappear useful volume in oxygen pond of internal reflux mixed solution is 1/4 ~ 1/3 of anoxic pond useful volume.
Further, described internal reflux pump is arranged on Aerobic Pond end.
Further, described internal reflux mixed solution disappears oxygen pond for completely hybrid or pulling flow type.
The described internal reflux mixed solution that arranges disappears the strengthened denitrification method in oxygen pond, it is characterized in that, comprises the following steps:
(1) the oxygen pond water outlet that disappears of internal reflux mixed solution enters anoxic pond together with anaerobic pond water outlet, and internal reflux ratio is 100 ~ 300%, and stop 3 ~ 4 hours under anoxic and agitation condition, MLSS is 3 ~ 4g/L;
(2) step (1) gained anoxic pond mixed solution is entered Aerobic Pond, stop 8 ~ 9 hours under aerobic condition, MLSS is 3 ~ 4g/L, and Aerobic Pond latter end DO concentration controls at 2mg/L;
The Aerobic Pond mixed solution of (3) 100 ~ 300% is transported to internal reflux mixed solution by internal reflux pump by mixed solution internal reflux pipeline as internal reflux mixed solution and to be disappeared oxygen pond, stops 20 ~ 60 minutes under agitation; Remaining Aerobic Pond mixed solution enters second pond as Aerobic Pond water outlet and carries out mud-water separation.
The present invention has the following advantages and positively effect:
(1) the present invention can solve internal reflux mixed solution DO in the production run of current maximum discharge standard urban wastewater treatment firm technique denitrification efficiency is produced to the practical problems of remarkable disadvantageous effect by the return flow path of internal reflux mixed solution between anoxic pond and Aerobic Pond being arranged the disappear strengthened denitrification method in oxygen pond of internal reflux mixed solution;
(2) compared with general strengthened denitrification method, the present invention has that utilization of carbon source rate is high, strengthened denitrification effect significantly, simple, the production run low cost and other advantages of design and operation method, the engineering design and the operational management that can be China's maximum discharge standard urban wastewater treatment firm provide new approaches;
(3) property of the present invention is directed to and workable, for maximum discharge standard urban wastewater treatment firm stably reaching standard and energy-saving and cost-reducingly to have important practical significance.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of strengthened denitrification system of the present invention.
Embodiment
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in Figure 1: the described internal reflux mixed solution that arranges disappears that the strengthened denitrification system in oxygen pond comprises anoxic pond 1, Aerobic Pond 2, internal reflux mixed solution disappear oxygen pond 3, internal reflux pump 4, mixed solution internal reflux pipeline 5, anaerobic pond water outlet 6, Aerobic Pond water outlet 7 etc.
As shown in Figure 1, the present invention includes anoxic pond 1, Aerobic Pond 2 and internal reflux mixed solution to disappear oxygen pond 3, anoxic pond 1 is connected with Aerobic Pond 2, internal reflux pump 4 is set in Aerobic Pond 2, Aerobic Pond 2 to be connected internal reflux mixed solution by internal reflux pump 4 and to disappear oxygen pond 3 with mixed solution internal reflux pipeline 5, the internal reflux mixed solution oxygen pond 3 that disappears connects anoxic pond 1 by mixed solution internal reflux pipeline 5;
Described anoxic pond 1 connects anaerobic pond water outlet 6; Described Aerobic Pond 2 connects Aerobic Pond water outlet 7, and Aerobic Pond water outlet enters follow-up second pond;
The described internal reflux mixed solution oxygen pond 3 that disappears is arranged on the return flow path of the internal reflux mixed solution between anoxic pond 1 and Aerobic Pond 2, and the disappear useful volume in oxygen pond 3 of internal reflux mixed solution is 1/4 ~ 1/3 of anoxic pond 1 useful volume;
Described internal reflux pump 4 is arranged on Aerobic Pond 2 end, Aerobic Pond 2 outlet water at tail end mixed solution is pumped into internal reflux mixed solution by mixed solution internal reflux pipeline 5 and to disappear oxygen pond 3;
Described internal reflux mixed solution disappears oxygen pond 3 for completely hybrid or pulling flow type.
Embodiment one: a kind of internal reflux mixed solution that arranges disappears the strengthened denitrification method in oxygen pond, comprises the following steps:
The internal reflux mixed solution of (1) 100% oxygen pond 3 water outlet that disappears enters anoxic pond 1 together with anaerobic pond water outlet 6, stops 3 hours under anoxic and agitation condition, carries out anti-nitration reaction and denitrogenation under microorganism (MLSS is 3g/L) effect; Wherein 100% is the ratio of internal reflux mixed solution flow and flooding velocity;
(2) step (1) gained anoxic pond mixed solution enters Aerobic Pond 2, stop 8 hours under aerobic condition, under microorganism (MLSS is 3g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction, Aerobic Pond 2 latter end DO concentration controls at 2mg/L simultaneously;
The Aerobic Pond mixed solution of (3) 100% is transported to internal reflux mixed solution by the internal reflux pump 4 being arranged on Aerobic Pond 2 end by internal reflux pipeline 5 as internal reflux mixed solution and to be disappeared oxygen pond 3, stops 20 minutes under agitation, carries out oxygen consumption reaction and the oxygen that disappears; Remaining Aerobic Pond mixed solution enters second pond as Aerobic Pond water outlet 7 and carries out mud-water separation.
Embodiment two: a kind of internal reflux mixed solution that arranges disappears the strengthened denitrification method in oxygen pond, comprises the following steps:
The internal reflux mixed solution of (1) 300% oxygen pond 3 water outlet that disappears enters anoxic pond 1 together with anaerobic pond water outlet 6, stops 4 hours under anoxic and agitation condition, carries out anti-nitration reaction and denitrogenation under microorganism (MLSS is 4g/L) effect; Wherein 300% is the ratio of internal reflux mixed solution flow and flooding velocity;
(2) step (1) gained anoxic pond mixed solution enters Aerobic Pond 2, stop 9 hours under aerobic condition, under microorganism (MLSS is 4g/L) effect, carry out oxidation operation, biological nitration and aerobic suction phosphorus reaction, Aerobic Pond 2 latter end DO concentration controls at 2mg/L simultaneously;
The Aerobic Pond mixed solution of (3) 300% is transported to internal reflux mixed solution by the internal reflux pump 4 being arranged on Aerobic Pond 2 end by internal reflux pipeline 5 as internal reflux mixed solution and to be disappeared oxygen pond 3, stops 60 minutes under agitation, carries out oxygen consumption reaction and the oxygen that disappears; Remaining Aerobic Pond mixed solution enters second pond as Aerobic Pond water outlet 7 and carries out mud-water separation.
Embodiment three: a kind of internal reflux mixed solution that arranges disappears the strengthened denitrification method in oxygen pond, comprises the following steps:
The internal reflux mixed solution of (1) 200% oxygen pond 3 water outlet that disappears enters anoxic pond 1 together with anaerobic pond water outlet 6, stops 3.5 hours under anoxic and agitation condition, carries out anti-nitration reaction and denitrogenation under microorganism (MLSS is 3g/L) effect; Wherein 200% is the ratio of internal reflux mixed solution flow and flooding velocity;
(2) step (1) gained anoxic pond mixed solution enters 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, Aerobic Pond 2 latter end DO concentration controls at 2mg/L simultaneously;
The Aerobic Pond mixed solution of (3) 200% is transported to backflow mixed liquor by the internal reflux pump 4 being arranged on Aerobic Pond 2 end by reflux line 5 as internal reflux mixed solution and to be disappeared oxygen pond 3, stops 40 minutes under agitation, carries out oxygen consumption reaction and the oxygen that disappears; Remaining Aerobic Pond mixed solution enters second pond as Aerobic Pond water outlet 7 and carries out mud-water separation.
Claims (6)
1. one kind arranges internal reflux mixed solution and to disappear the strengthened denitrification system in oxygen pond, it is characterized in that: comprise anoxic pond (1), Aerobic Pond (2) and internal reflux mixed solution and to disappear oxygen pond (3), anoxic pond (1) is connected with Aerobic Pond (2), internal reflux pump (4) is set in Aerobic Pond (2), Aerobic Pond (2) to be connected internal reflux mixed solution by internal reflux pump (4) and to disappear oxygen pond (3) with mixed solution internal reflux pipeline (5), the internal reflux mixed solution oxygen pond (3) that disappears connects anoxic pond (1) by mixed solution internal reflux pipeline (5).
2. arrange internal reflux mixed solution as claimed in claim 1 to disappear the strengthened denitrification system in oxygen pond, it is characterized in that: described anoxic pond (1) connects anaerobic pond water outlet (6); Described Aerobic Pond (2) connects Aerobic Pond water outlet (7).
3. arrange internal reflux mixed solution as claimed in claim 1 to disappear the strengthened denitrification system in oxygen pond, it is characterized in that: the described internal reflux mixed solution oxygen pond (3) that disappears is arranged on the return flow path of the internal reflux mixed solution between anoxic pond (1) and Aerobic Pond (2), the disappear useful volume in oxygen pond (3) of internal reflux mixed solution is 1/4 ~ 1/3 of anoxic pond (1) useful volume.
4. arrange internal reflux mixed solution as claimed in claim 1 to disappear the strengthened denitrification system in oxygen pond, it is characterized in that: described internal reflux pump (4) is arranged on Aerobic Pond (2) end.
5. arrange internal reflux mixed solution as claimed in claim 1 to disappear the strengthened denitrification system in oxygen pond, it is characterized in that: described internal reflux mixed solution disappears oxygen pond (3) for completely hybrid or pulling flow type.
6. arrange internal reflux mixed solution to disappear the strengthened denitrification method in oxygen pond, it is characterized in that, comprise the following steps:
(1) oxygen pond (3) water outlet that disappears of internal reflux mixed solution enters anoxic pond (1) together with anaerobic pond water outlet (6), and internal reflux ratio is 100 ~ 300%, and stop 3 ~ 4 hours under anoxic and agitation condition, MLSS is 3 ~ 4g/L;
(2) step (1) gained anoxic pond (1) mixed solution is entered Aerobic Pond (2), stop 8 ~ 9 hours under aerobic condition, MLSS is 3 ~ 4g/L, and Aerobic Pond (2) latter end DO concentration controls at 2mg/L;
Aerobic Pond (2) mixed solution of (3) 100 ~ 300% is transported to internal reflux mixed solution by internal reflux pump (4) by mixed solution internal reflux pipeline (5) as internal reflux mixed solution and to be disappeared oxygen pond (3), stops 20 ~ 60 minutes under agitation; Remaining Aerobic Pond mixed solution enters second pond as Aerobic Pond water outlet (7) and carries out mud-water separation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410662992.4A CN104341043A (en) | 2014-11-19 | 2014-11-19 | System for enhanced denitrification with inner reflux mixing liquid type oxygen removal pool and method |
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| CN201410662992.4A CN104341043A (en) | 2014-11-19 | 2014-11-19 | System for enhanced denitrification with inner reflux mixing liquid type oxygen removal pool and method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003024980A (en) * | 2001-07-12 | 2003-01-28 | Toshiba Corp | Wastewater treatment apparatus |
| CN1903745A (en) * | 2006-08-15 | 2007-01-31 | 北京工业大学 | Improved UCT technology and device |
| CN101767857A (en) * | 2010-01-26 | 2010-07-07 | 江苏裕隆环保有限公司 | Method for improving wastewater denitrification and dephosphorization, and device for deoxidizing reflux liquid |
| CN103896463A (en) * | 2014-03-31 | 2014-07-02 | 中联环有限公司 | A<2>/O and MBR combined sewage regenerating process and device |
| CN104030443A (en) * | 2014-06-27 | 2014-09-10 | 中国市政工程华北设计研究总院有限公司 | Fine management-based municipal sewage enhanced phosphorus and nitrogen removal system and treatment process thereof |
| CN204251415U (en) * | 2014-11-19 | 2015-04-08 | 中国市政工程华北设计研究总院有限公司 | Arrange internal reflux mixed solution to disappear the strengthened denitrification system in oxygen pond |
-
2014
- 2014-11-19 CN CN201410662992.4A patent/CN104341043A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003024980A (en) * | 2001-07-12 | 2003-01-28 | Toshiba Corp | Wastewater treatment apparatus |
| CN1903745A (en) * | 2006-08-15 | 2007-01-31 | 北京工业大学 | Improved UCT technology and device |
| CN101767857A (en) * | 2010-01-26 | 2010-07-07 | 江苏裕隆环保有限公司 | Method for improving wastewater denitrification and dephosphorization, and device for deoxidizing reflux liquid |
| CN103896463A (en) * | 2014-03-31 | 2014-07-02 | 中联环有限公司 | A<2>/O and MBR combined sewage regenerating process and device |
| CN104030443A (en) * | 2014-06-27 | 2014-09-10 | 中国市政工程华北设计研究总院有限公司 | Fine management-based municipal sewage enhanced phosphorus and nitrogen removal system and treatment process thereof |
| CN204251415U (en) * | 2014-11-19 | 2015-04-08 | 中国市政工程华北设计研究总院有限公司 | Arrange internal reflux mixed solution to disappear the strengthened denitrification system in oxygen pond |
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Application publication date: 20150211 |
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