CN203048738U - Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process - Google Patents
Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process Download PDFInfo
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- CN203048738U CN203048738U CN 201320000680 CN201320000680U CN203048738U CN 203048738 U CN203048738 U CN 203048738U CN 201320000680 CN201320000680 CN 201320000680 CN 201320000680 U CN201320000680 U CN 201320000680U CN 203048738 U CN203048738 U CN 203048738U
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Abstract
The utility model relates to a device for strengthening autotrophic nitrogen removal of an urban wastewater oxidation ditch process, and belongs to the field of wastewater treatment. The device comprises a high load active sewage reactor, a middle settling pond, an oxidation ditch reactor and a secondary settling pond. The high load active sewage reactor is provided with an anaerobic zone and an aerobic zone. The oxidation ditch reactor is provided with a hypoxia zone and an anoxic zone. The hypoxia zone supplies oxygen through an aerating system, and the anoxic zone stirs through an under-liquid propeller. The device enriches organic matters in wastewater to sludge while removes phosphorus biologically, and sludge is then used for producing methane anaerobically to promote recovery of energy in wastewater. Meanwhile, autotrophic nitrogen removal is realized by hypoxia and anoxic alternation, so that the operational energy consumption of wastewater treatment can be greatly reduced.
Description
Technical field
The utility model relates to a kind of device of strengthening municipal effluent oxidation ditch process autotrophic denitrification, belongs to the dirty water living creature processing technique field.
Background technology
The oxidation ditch process sludge retention time is long, is conducive to the growth of nitrifier, so the oxidation ditch process nitrification effect generally can be guaranteed.When the oxidation ditch system sludge age was longer, the excess sludge discharge amount was few, can influence the system biological phosphor-removing effect.Especially when the municipal effluent carbon-nitrogen ratio was low, denitrification denitrogenation and anaerobic phosphorus release competition carbon source caused oxidation ditch system denitrogenation dephosphorizing effect to be difficult to ensure.
After anaerobism ammonia oxygen bacterium was found, the sewage autotrophic denitrification became possibility.At first ammonia oxidation bacteria is oxidized to nitrite with ammonia nitrogen, and then anaerobism ammonia oxygen bacterium recycling nitrite-oxidizing ammonia nitrogen is finally realized the removal of nitrogen in the sewage.If can in oxidation ditch process, strengthen autotrophic denitrification, will reduce organic demand in the denitrification process, thereby the organism in the sewage can be used for biological phosphate-eliminating and methanogenesis.Therefore strengthen the oxidation ditch process autotrophic denitrification, be expected to improve municipal effluent denitrogenation dephosphorizing effect, reduce the sewage disposal energy consumption, be expected to improve the Sewage Plant methane production simultaneously.
The utility model content
The purpose of this utility model is exactly for improving existing municipal effluent oxidation ditch process treatment effect, reduce operation energy consumption, a kind of device of strengthening municipal effluent oxidation ditch process autotrophic denitrification has been proposed, this device and device at first are used for biological phosphate-eliminating with the organism in the sewage and improve phosphor-removing effect, simultaneously a part of organism are enriched in the mud; The enrichment of this mud organic substance can improve the anaerobic fermentation methane content, thereby improves energy recovery rate in the sewage; Sewage behind the dephosphorization organic matter removal carries out autotrophic denitrification by the short distance nitration Anammox again.
The purpose of this utility model solves by following solution: strengthen the device of municipal effluent oxidation ditch process autotrophic denitrification, it is characterized in that being provided with high loading activated sludge reactor 1, intermediate sedimentation pond 2, oxidation ditch reactor 3 and second pond 4; High loading activated sludge reactor 1 is provided with anaerobic zone 1.1 and aerobic zone 1.2, and aerobic zone 1.2 is connected with intermediate sedimentation pond 2, by sludge reflux pump 1.3 intermediate sedimentation pond 2 is connected with anaerobic zone 1.1 simultaneously; Intermediate sedimentation pond 2 is connected with oxidation ditch reactor 3; Oxidation ditch reactor 3 is provided with thruster 3.1 under the liquid, overflow weir 3.2, oxidation ditch second pond pipe connecting 3.3, air compressor machine 3.5, gas meter 3.6, aeration tube 3.7; Oxidation ditch second pond pipe connecting is connected oxidation ditch reactor 3 with second pond 4, second pond 4 is connected with oxidation ditch reactor 3 feed-water ends by sludge reflux pump 3.4 simultaneously.
The treatment scheme of municipal effluent in this device is: municipal effluent enters the anaerobic zone of high loading activated sludge reactor with intermediate sedimentation pond returned sluge, is absorbed with and the storing machine thing at this stage polyP bacteria; Mud mixture enters aerobic zone together subsequently, and polyP bacteria the effect of excessive suction phosphorus takes place phosphor in sewage is absorbed to mud; This stage is adsorbed to active sludge by the activated sludge absorption effect with the partial organic substances in the water simultaneously, and organism in the water is enriched in the mud; The water outlet of high loading activated sludge reactor enters the intermediate sedimentation pond and realizes mud-water separation, and partly precipitated mud is back to high loading activated sludge reactor anaerobic zone, and partly precipitated mud is as excess sludge discharge.The water outlet of intermediate sedimentation pond enters oxidation ditch reactor oxygen-starved area with the oxidation ditch returned sluge, utilizes in the sewage remaining organism to realize denitrification as denitrifying carbon source in this zone; Mud mixture enters the hypoxemia district subsequently, and short distance nitration and Anammox effect take place, and then enters the oxygen-starved area again the Anammox effect takes place; Pass through hypoxemia district and oxygen-starved area later on successively, repeat above effect, finally reach the purpose of strengthening the oxidation ditch process autotrophic denitrification.
The utlity model has following advantage:
1) organism at first is used for biological phosphate-eliminating in the sewage, can improve the sewage dephosphorization effect;
2) partial organic substances is enriched in the mud in the high loading activated sludge reactor in the sewage, and this mud is used to can to improve unit sludge when methane is produced in fermentation again and produces methane content;
3) hypoxemia district and oxygen-starved area alternate run can reduce nitrite concentration in the reactor, avoid nitrite that anaerobic ammonia oxidizing bacteria is produced and suppress;
4) the nitrated aeration rate that reduces of hypoxia short distance reduces the Sewage Plant energy consumption;
5) strengthening short distance nitration Anammox autotrophic denitrification, can to reduce greenhouse gas emission few.
Description of drawings
Fig. 1 strengthens the apparatus structure synoptic diagram of municipal effluent oxidation ditch process autotrophic denitrification for the utility model.
1 is the high loading activated sludge reactor among the figure, and 2 is the intermediate sedimentation pond, and 3 is the oxidation ditch reactor, and 4 is second pond; In the high loading activated sludge reactor, 1.1 is anaerobic zone, and 1.2 is aerobic zone, and 1.3 is sludge reflux pump, and 1.4 is air compressor machine, and 1.5 is gas meter; In the oxidation ditch reactor, 3.1 is thruster under the liquid, and 3.2 is overflow weir, and 3.3 is oxidation ditch second pond pipe connecting, and 3.4 is sludge reflux pump, and 3.5 is air compressor machine, and 3.6 is gas meter, and 3.7 is aeration tube.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further: the device of strengthening municipal effluent oxidation ditch process autotrophic denitrification as shown in Figure 1 is provided with high loading activated sludge reactor 1, intermediate sedimentation pond 2, oxidation ditch reactor 3 and second pond 4; High loading activated sludge reactor 1 is provided with anaerobic zone 1.1 and aerobic zone 1.2, and aerobic zone 1.2 is connected with intermediate sedimentation pond 2, by sludge reflux pump 1.3 intermediate sedimentation pond 2 is connected with anaerobic zone 1.1 simultaneously; Intermediate sedimentation pond 2 is connected with oxidation ditch reactor 3; Oxidation ditch reactor 3 is provided with thruster 3.1 under the liquid, overflow weir 3.2, oxidation ditch second pond pipe connecting 3.3, air compressor machine 3.5, gas meter 3.6, aeration tube 3.7; Oxidation ditch second pond pipe connecting is connected oxidation ditch reactor 3 with second pond 4, second pond 4 is connected with oxidation ditch reactor 3 feed-water ends by sludge reflux pump 3.4 simultaneously.
Test adopts certain community life sewage as former water, and concrete water quality is as follows: COD concentration is 100-250 mg/L; NH+ 4-N concentration is 60-90 mg/L, NO-2-N≤0.5 mg/L, NO-3-N≤0.5 mg/L.Pilot system as shown in Figure 1.
Concrete operation is as follows:
1) start-up system: inoculation municipal wastewater treatment plant active sludge adds to high loading activated sludge reactor 1, makes sludge concentration reach 3000 mg/L; With short distance nitration mud with add to oxidation ditch reactor 3 after Anammox mud mixes, making aerobic ammonia oxidation speed and Anammox speed ratio is 0.8:1-1.2:1, and makes sludge concentration reach 3000 mg/L; Simultaneously add Powdered Activated Carbon 500mg/L to oxidation ditch reactor 3;
It is as follows to regulate operation when 2) moving:
2.1) high loading activated sludge reactor 1 return sludge ratio controls 50%; Anaerobic zone hydraulic detention time HRT control is at 10min; The control of aerobic zone dissolved oxygen concentration is at 0.5-2.0mg/L, and aerobic zone hydraulic detention time HRT control is at 40min; Sludge age control was at 3 days;
2.2) oxygen-starved area and hypoxemia district are arranged alternately in the oxidation ditch reactor 3, namely in the hypoxemia district by the aerating apparatus oxygenation, stir by thruster under the liquid oxygen-starved area; And oxygen-starved area and hypoxemia district volumetric ratio are 1:1;
2.3) in the oxidation ditch reactor 3 the hypoxemia district by adjusting aeration rate control dissolved oxygen concentration at 0.15-0.40mg/L, when the terminal nitrite nitrogen concentration in hypoxemia district〉10mg/L, or the terminal nitrite nitrogen concentration in oxygen-starved area〉during 1mg/L, reduce the dissolved oxygen concentration in hypoxemia district;
2.4) oxidation ditch reactor 3 return sludge ratios control 50%.
Test-results shows: after stable, high loading activated sludge reactor effluent COD concentration is 40-80 mg/L, NH+ 4-N concentration 50-80 mg/L, and NO-2-N concentration is 0.1-3.0 mg/L, NO-3-N concentration 0.0.2-2.0 mg/L; Short distance nitration anaerobic ammonia oxidation reactor effluent COD concentration is 40-70 mg/L, NH+ 4-N concentration 1.5-11.0 mg/L, and NO-2-N concentration is 0.1-2.0 mg/L, NO-3-N concentration 0.8-7.0 mg/L, TN is lower than 15.0 mg/L.
Claims (1)
1. strengthen the device of municipal effluent oxidation ditch process autotrophic denitrification, it is characterized in that: this device is provided with high loading activated sludge reactor (1), intermediate sedimentation pond (2), oxidation ditch reactor (3) and second pond (4); High loading activated sludge reactor (1) is provided with anaerobic zone (1.1) and aerobic zone (1.2), and aerobic zone (1.2) is connected with intermediate sedimentation pond (2), by sludge reflux pump (1.3) intermediate sedimentation pond (2) is connected with anaerobic zone (1.1) simultaneously; Intermediate sedimentation pond (2) is connected with oxidation ditch reactor (3); Oxidation ditch reactor (3) is provided with thruster under the liquid (3.1), overflow weir (3.2), oxidation ditch second pond pipe connecting (3.3), air compressor machine (3.5), gas meter (3.6), aeration tube (3.7); Oxidation ditch second pond pipe connecting is connected oxidation ditch reactor (3) with second pond (4), second pond (4) is connected with oxidation ditch reactor (3) feed-water end by sludge reflux pump (3.4) simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320000680 CN203048738U (en) | 2013-01-02 | 2013-01-02 | Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320000680 CN203048738U (en) | 2013-01-02 | 2013-01-02 | Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process |
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| CN203048738U true CN203048738U (en) | 2013-07-10 |
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| CN 201320000680 Expired - Lifetime CN203048738U (en) | 2013-01-02 | 2013-01-02 | Device for strengthening autotrophic nitrogen removal of urban wastewater oxidation ditch process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430578A (en) * | 2016-10-08 | 2017-02-22 | 凌志环保股份有限公司 | Integrated A2O improvement system |
| CN108439596A (en) * | 2018-04-08 | 2018-08-24 | 福建省环境科学研究院（福建省排污权储备和管理技术中心） | A kind of method of one-part form semi-hitrosation-Anammox-denitrification coupling technique processing town domestic sewage |
| CN114590891A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气集团有限公司 | Integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device |
| CN114590890A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气集团有限公司 | Coupling oxidation ditch denitrification process device |
-
2013
- 2013-01-02 CN CN 201320000680 patent/CN203048738U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106430578A (en) * | 2016-10-08 | 2017-02-22 | 凌志环保股份有限公司 | Integrated A2O improvement system |
| CN108439596A (en) * | 2018-04-08 | 2018-08-24 | 福建省环境科学研究院（福建省排污权储备和管理技术中心） | A kind of method of one-part form semi-hitrosation-Anammox-denitrification coupling technique processing town domestic sewage |
| CN114590891A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气集团有限公司 | Integrated multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device |
| CN114590890A (en) * | 2020-12-04 | 2022-06-07 | 中国石油天然气集团有限公司 | Coupling oxidation ditch denitrification process device |
| CN114590891B (en) * | 2020-12-04 | 2023-10-27 | 中国石油天然气集团有限公司 | Integral multistage partial nitrification-anaerobic ammonia oxidation gradual denitrification process device |
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