CN102765854B - Treating process for sewage settled in middle position - Google Patents
Treating process for sewage settled in middle position Download PDFInfo
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- CN102765854B CN102765854B CN 201210240713 CN201210240713A CN102765854B CN 102765854 B CN102765854 B CN 102765854B CN 201210240713 CN201210240713 CN 201210240713 CN 201210240713 A CN201210240713 A CN 201210240713A CN 102765854 B CN102765854 B CN 102765854B
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- aeration tank
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Abstract
A treating process for sewage settled in a middle position comprises an aeration tank, a secondary sedimentation tank and a non-aeration tank, which are arranged in sequence from the top down and communicated with one another; sludge and sewage settled at the bottom of the secondary sedimentation tank at the middle part jointly enter the non-aeration tank at the bottom; mixed fluid in the non-aeration tank at the bottom and mixed fluid in the aeration tank arranged at the upper part jointly enter the secondary sedimentation tank in the middle for sludge-sewage separation; supernatant fluid in the secondary sedimentation tank in the middle is drained by a drain device arranged above the secondary sedimentation tank; and part of sludge settled in the secondary sedimentation tank in the middle flows back to the aeration tank, another part of the sludge flows back to the non-aeration tank at the bottom, and the rest part of the sludge serves as surplus sludge to be discharged. Through the use of the method, the engineering investment and the operation cost are saved greatly; the method has the advantages that the aeration amount is reduced, required silicon sources are fewer, the construction and operation costs are low, and the occupied area is small; and the method can better solve the problem that the occupied area in sewage treatment is larger, and also can solve the treatment problem that high-efficiency dephosphorization and denitrogenation of sewage are difficult to realize because the silicon sources are fewer and the ratio of carbon to nitrogen to phosphorus is imbalanced. The method is a biological phosphorus removal and denitrogenation process, and is suitable for treating low-carbon-source sewage, especially sewage occupying small areas.
Description
Technical field
The present invention relates to the meta precipitation sewage treatment process, the dephosphorization denitrogenation that is particularly useful for low carbon source sewage is processed, and is widely used in the biochemical treatment of organic sewage or organic waste water.
Background technology
Along with the raising of Public Environmental Awareness and more and more stricter to the limitation standard of the discharging of sewage disposal both at home and abroad, especially construction land is more and more nervous, and the research and development floor space is little, economical, sewage disposal technology is the focus in Water Pollution Control Engineering field always efficiently.
Summary of the invention
Technical problem: the objective of the invention is to overcome the weak point in the prior art, provide a kind of floor space little, energy consumption is little, the sewage treatment process that running cost is low.
Technical scheme: meta precipitation sewage treatment process of the present invention:
A. build the aeration tank that is interconnected, not aeration tank and second pond jointly, second pond is located at the aeration tank and not between the aeration tank, on the top of second pond the water shoot that tube wall is furnished with a plurality of prosopores is set, the aerobic sludge return line that is communicated with the aeration tank is set in the bottom of second pond (5) and is communicated with not aeration tank anaerobic sludge return line;
B. by the anaerobic sludge return line mud of second pond bottom is drawn, together enter not aeration tank with the sewage that enters in the aeration tank not, enter in the second pond through behind the anaerobic reaction, mix rear drawing by the aerobic sludge return line with the mud of second pond bottom again and enter the aeration tank;
C. carry out entering second pond behind the aeration in the aeration tank, mix common reaction with the muddy water that enters second pond in the aeration tank never, carry out mud-water separation, the supernatant liquor in the second pond is discharged by the water shoot on second pond top.
Describedly together enter mud in the aeration tank not and the ratio of sewage quantity is 0.3:1-2:1; The described ratio that enters precipitating sludge and sewage in the aeration tank is 2:1-10:1; In described not aeration tank and aeration tank, can be added to respectively biofilm development the filler that adheres to medium is provided; The individual rising pipe that is connected with a little less than the aeration tank elevation of water surface of the outlet pipe of described water shoot.
Beneficial effect: the present invention from top to bottom arranges in order and the aeration tank that is connected, second pond, the aeration tank is not built jointly or minute built and can save in a large number occupation of land.Precipitating sludge part in the second pond that the middle part arranges is back to the aeration tank, and the not aeration tank bottom another part is back to and this partly precipitated mud and the two liquid flow rate of sewage enter the aeration tank on top jointly; So that bottom, aeration tank mud does not carry out first the reaction of anaerobism absorption organic carbon when water inlet, and then carry out denitrification dephosphorization with being blended in from the nitric nitrogen of aeration tank, top or nitrite nitrogen in the second pond that the middle part arranges, take full advantage of limited carbon source, improve the utilization ratio of carbon source in the wastewater treatment, effectively solved the problem of carbon source deficiency in the phosphate uptake; Major advantage: 1. the present invention is conducive to form denitrification dephosphorization under anoxia condition, and denitrification denitrogenation and 2 self-contained process of suction phosphorus are united two into one, and a carbon is dual-purpose; Muddy water mixed solution carries out in the mud-water separation process, finishes denitrification and except phosphorus reaction, takes full advantage of the space of the second pond that meta arranges and nitrite nitrogen and the nitric nitrogen in reduce mud and the water outlet;
The present invention have save that aeration rate, required carbon source are less, construction and the advantage such as working cost is low, floor space is little, improved the utilization ratio of carbon source in the wastewater treatment, can solve preferably because of carbon source on the low side, carbon, nitrogen, phosphorus ratio imbalance, and be difficult to realize the processing problem of the sewage of highly effective dephosphorizing denitrification.
Description of drawings
Among the figure: the 1-aeration tank, 2-is the aeration tank not, 3-aerobic sludge return line, 4-anaerobic sludge return line, 5-second pond, 6-water shoot.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are further described:
As shown in Figure 1, meta precipitation sewage treatment process of the present invention: comprise and build the aeration tank 1 that is interconnected, not aeration tank 2 and second pond 5 jointly, second pond 5 is located at aeration tank 1 and not between the aeration tank 2, the water shoot 6 that tube wall is furnished with a plurality of prosopores is set on the top of second pond 5, the aerobic sludge return line 3 that is communicated with aeration tank 1 is set in the bottom of second pond 5 and is communicated with not aeration tank 2 anaerobic sludge return lines 4; The individual rising pipe that is connected with a little less than aeration tank 1 elevation of water surface of the outlet pipe of described water shoot 6; By anaerobic sludge return line 4 mud of second pond 5 bottoms is drawn, together enter not aeration tank 2 with the sewage that enters in the aeration tank not 2, together entering mud in the aeration tank 2 not and the ratio of sewage quantity is 0.3:1-2:1.Do not enter aeration tank 2 and enter in the second pond 5 through behind the anaerobic reactions, mixes to draw by aerobic sludge return line 3 afterwards entering aeration tank 1 with the mud of second pond 5 bottoms again, the two liquid flow rate ratio of this partly precipitated mud and sewage is 2:1-10:1; In described not aeration tank 2 and aeration tank 1 interior interpolation or be not added to biofilm development the filler that adheres to medium is provided.Carry out entering second pond 5 behind the aeration in aeration tank 1, mix common reaction with the muddy water that enters second pond 5 in the aeration tank 2 never, carry out mud-water separation, the supernatant liquors in the second pond 5 are discharged by the water shoot 6 on second pond top.Redundance is discharged as excess sludge.
Working process: the aeration tank that from top to bottom splits and be connected in order, second pond, aeration tank not, and jointly enter not aeration tank, bottom from precipitating sludge and the sewage bottom the second pond of middle part setting, the mixed solution of the not aeration tank that arranges from the bottom carries out mud-water separation with the second pond that the mixed solution of the aeration tank that arranges from top enters the middle part jointly, supernatant liquor in the second pond that the middle part arranges is discharged by the water-freeing arrangement that the second pond top arranges, precipitating sludge part in the second pond that the middle part arranges is back to the aeration tank, another part is back to the not aeration tank of bottom, and redundance is discharged as excess sludge.Jointly enter not aeration tank, bottom from precipitating sludge and the two liquid flow rate of sewage bottom the second pond of middle part setting, precipitating sludge part in the second pond that the middle part arranges is back to the aeration tank, and the not aeration tank bottom another part is back to and this partly precipitated mud and the two liquid flow rate of sewage enter the aeration tank on top jointly.
Claims (1)
1. meta precipitation sewage treatment process is characterized in that:
A. build the aeration tank (1) that is interconnected, not aeration tank (2) and second pond (5) jointly, second pond (5) is located at aeration tank (1) and not between aeration tank (2), the water shoot (6) that tube wall is furnished with a plurality of prosopores is set on the top of second pond (5), the aerobic sludge return line (3) that is communicated with aeration tank (1) is set in the bottom of second pond (5) and is communicated with not aeration tank (2) anaerobic sludge return line (4);
B. by anaerobic sludge return line (4) mud of second pond (5) bottom is drawn, together enter not aeration tank (2) with the sewage that enters in not aeration tank (2), enter in the second pond (5) through behind the anaerobic reaction, mix rear drawing by aerobic sludge return line (3) with the mud of second pond (5) bottom again and enter aeration tank (1);
C. enter second pond (5) after in aeration tank (1), carrying out aeration, mix common reaction with the muddy water that enters second pond (5) in never aeration tank (2), carry out mud-water separation, the supernatant liquor in the second pond (5) is discharged by the water shoot (6) on second pond top.
2. a kind of meta precipitation sewage treatment process according to claim 1 is characterized in that: describedly together enter mud in not aeration tank (2) and the ratio of sewage quantity is 0.3:1-2:1.
3. a kind of meta precipitation sewage treatment process according to claim 1 is characterized in that: the described ratio that enters precipitating sludge and sewage in the aeration tank (1) is 2:1-10:1.
4. a kind of meta precipitation sewage treatment process according to claim 1 is characterized in that: be added to respectively biofilm development in described not aeration tank (2) and aeration tank (1) filler that adheres to medium is provided.
5. a kind of meta precipitation sewage treatment process according to claim 1, it is characterized in that: the outlet pipe of described water shoot (6) is connected with the rising pipe a little less than aeration tank (1) elevation of water surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210240713 CN102765854B (en) | 2012-07-12 | 2012-07-12 | Treating process for sewage settled in middle position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210240713 CN102765854B (en) | 2012-07-12 | 2012-07-12 | Treating process for sewage settled in middle position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102765854A CN102765854A (en) | 2012-11-07 |
| CN102765854B true CN102765854B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201210240713 Expired - Fee Related CN102765854B (en) | 2012-07-12 | 2012-07-12 | Treating process for sewage settled in middle position |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158825A (en) * | 1996-12-30 | 1997-09-10 | 东南大学 | Alternative integral biological treater and treatment method |
| CN101041509A (en) * | 2007-04-24 | 2007-09-26 | 上海亚同环保实业有限公司 | Circulation flow ring-shaped biological denitrification phosphorous removal technique |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1157784A (en) * | 1997-08-22 | 1999-03-02 | Hitachi Ltd | Water flow machine |
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2012
- 2012-07-12 CN CN 201210240713 patent/CN102765854B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158825A (en) * | 1996-12-30 | 1997-09-10 | 东南大学 | Alternative integral biological treater and treatment method |
| CN101041509A (en) * | 2007-04-24 | 2007-09-26 | 上海亚同环保实业有限公司 | Circulation flow ring-shaped biological denitrification phosphorous removal technique |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-57784A 1999.03.02 |
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| CN102765854A (en) | 2012-11-07 |
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