CN101898853A - Sewage primary sedimentation treatment method and system for removing intensified suspended solid inorganic component - Google Patents
Sewage primary sedimentation treatment method and system for removing intensified suspended solid inorganic component Download PDFInfo
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- CN101898853A CN101898853A CN 201010218553 CN201010218553A CN101898853A CN 101898853 A CN101898853 A CN 101898853A CN 201010218553 CN201010218553 CN 201010218553 CN 201010218553 A CN201010218553 A CN 201010218553A CN 101898853 A CN101898853 A CN 101898853A
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Abstract
The invention discloses a sewage primary sedimentation treatment method and a sewage primary sedimentation treatment system for removing an intensified suspended solid inorganic component. In a high-load primary sedimentation tank, water flow in the tank body flows upwards slowly and rotationally flows in a horizontal direction, a suspended solid component with higher content of inorganic components and relatively higher weight deposits at the bottom of the high-load primary sediment tank to be discharged as settled sludge, and a suspended solid component with lower content of inorganic components and relatively less weight is used as outflow water of the primary sedimentation system along with outflow water flow which flows upwards, so that the ratio of VSS to SS is increased and the ratio of SS to BOD5 is decreased, thereby improving integral efficiency of a subsequent biological treatment system, treatment efficiency and operation stability, and particularly reducing residual sludge yield and improving sludge activity. The invention has the advantages of convenient implementation, simple operation management and flexible process adjustment, and can obviously reduce engineering investment and energy consumption level.
Description
Technical field:
The present invention relates to a kind of town sewage pretreatment system and treatment process, relate in particular to sewage primary sedimentation treatment method and system that a kind of intensified suspended solid inorganic component is removed.
Background technology:
Be in steady state for a long time with the city development construction, developed country that Infrastructure is more complete is obviously different, China overwhelming majority city all is in great development, the great development stage of continuous change and construction, add the hysteresis and the some shortcomings part of city rain sewage collecting, conveying and treatment and disposal Facilities Construction, the obvious higher problem of ubiquity suspended solid inorganic component and sediment charge in the town sewage of China various places (the especially sewage of combined system and mixed flow system sink drainage).
The SS/BOD of town sewage
5Ratio and VSS/SS ratio can characterize the content of its suspended solid inorganic component.According to the investigation statistics of national urban water supply and drainage Engineering Technical Research Centre, all there is water inlet SS/BOD in the urban wastewater treatment firm of China more than 70%
5The problem that ratio is higher wherein more has to account for the urban wastewater treatment firm of sum 30% or more and be in seriously higher state.With Jiangsu Province's Taihu Lake basin municipal sewage plant is example, its SS/BOD of intaking
5The annual mean of ratio is up to 2.0, and maximum value is about 8.0, apparently higher than the SS/BOD of orthobiosis sewage 1.0～1.2
5Ratio.
In the high urban wastewater treatment firm of water inlet suspended solid inorganic component content, if do not establish preliminary sedimentation tank, the residual active sludge productive rate in the Wastewater Treated by Activated Sludge Process system will be by 0.6～0.8kgDS/kgBOD of orthobiosis sewage
5Be increased to 1.0～1.5kgDS/kgBOD
5, excess sludge production doubles; When the residual active sludge productive rate raises, the shared part by weight of living microorganism component in the active sludge is corresponding to be reduced to 15%～25% level, be starkly lower than 40%～50% shared ratio of normal level, active sludge MLVSS/MLSS ratio only 0.3～0.4, more much lower than 0.7～0.75 normal level, so cause that the pond in biological sewage treatment pond holds that actual effective rate of utilization is low, denitrification denitrogenation ability and the biological phosphate-eliminating ability obviously descends, mixing raises with the oxygen supply power consumption, a series of problems such as difficulty increase are controlled in operation.In addition, these suspension inoganic solids and silt form the settling of alluvial property easily in structures such as biological treatment tank, sludge digestion tank, be difficult to cleaning, have both influenced the useful volume of reaction tank, also influence the power demand and the operational efficiency of aeration/mixing equipment.
Therefore, how at China's town sewage current actual water quality situation and processing requirements, new first heavy treatment system and treatment process are proposed, effectively remove the suspended solid inorganic component in the sewage and keep its organic constituent as far as possible, have crucial meaning to ensure follow-up biological carbon and phosphorous removal effect.
Summary of the invention:
Purpose of the present invention just is to provide a kind of sewage primary sedimentation treatment method and system of intensified suspended solid inorganic component removal, this method and system can effectively be removed the suspended solid inorganic component in the town sewage and can farthest keep the first heavy treatment system and the treatment process of organic suspending components, realize the proneness separation of urban wastewater treatment firm water inlet suspended solid inorganic component and making full use of of organic carbon source, improve whole efficiency, treatment effect and the operation stability of urban wastewater treatment firm, reduce construction investment and energy consumption material consumption level simultaneously.
As above design, technical scheme of the present invention is: the sewage primary sedimentation treatment method that a kind of intensified suspended solid inorganic component is removed, it is characterized in that: through the town sewage after grid and the sand setting processing, at first enter the middle and lower part of high loading preliminary sedimentation tank by connection line, carry out the water distribution uniformity of tangential direction by the water inlet water distribution system, promote to make sewage present the eddy flow that flows upward slowly with horizontal direction by low speed then, make that inorganic component content is lower, the less relatively suspended solids of proportion is with flowing on the current direction, escape and enter follow-up biological dephosphorize denitrification technique unit on the top of high loading preliminary sedimentation tank as water outlet that should just heavy treatment system with water outlet; The suspended solids that inorganic component content is higher, proportion is relatively large carries out follow-up processing and disposal to the sedimentation of the bottom of high loading preliminary sedimentation tank, discharge.
The sewage primary sedimentation treatment system that a kind of intensified suspended solid inorganic component is removed, by high loading preliminary sedimentation tank (1), be positioned at high loading preliminary sedimentation tank central position water inlet water distribution system (2), be installed on scraping of high loading preliminary sedimentation tank top and inhale mud portal structure (3), be installed on the spoil disposal subsystem of scraping the thruster (4) inhaled on the mud portal structure, be positioned at the effluent weir plate structure (5) on high loading preliminary sedimentation tank top and go out water collecting groove (6), be positioned at bottom the high loading preliminary sedimentation tank and form; Wherein, central tube water distributor (2) is connected with the grid and the sand setting processing structures water outlet A of front end by pipeline, go out water collecting groove (6) and be connected with follow-up biological treatment structures B by pipeline, the spoil disposal subsystem is connected with follow-up sludge treatment structures C by pipeline and sludge pump.
The design surface rate of load condensate of above-mentioned high loading preliminary sedimentation tank is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min.
Above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening, and it goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of center drum water distributor is a horizontal direction 45 opening.
Above-mentioned thruster (4) is low speed underwater scooter or agitator.
Above-mentioned spoil disposal subsystem is inhaled mud structure (7) and outer arranging device (8) formation of mud by scraping, and adopts the pump suction and pumping to send the mode spoil disposal.
The present invention has following positively effect:
1, breaks through the design and the operating range of traditional preliminary sedimentation tank surfaceloadingrate, improve surfaceloadingrate more than 1 times, the corresponding shortening of hydraulic detention time is over half, form the novel preliminary sedimentation tank system of high hydraulic load, the town sewage after handling through grid and sand setting enters the high loading preliminary sedimentation tank to carry out special precipitate and separate and handles.
2, by the angle of rake low speed pushing effect on central tube water distributor that is positioned at high loading preliminary sedimentation tank central position and the portal structure that is installed on high loading preliminary sedimentation tank top, make the sewage that enters the high loading preliminary sedimentation tank in the body of pond, present the eddy flow that flows upward slowly with horizontal direction, in finishing suspended solids legal person physical sedimentation and sepn process, realize that the water inlet suspended solid inorganic component separates with the otherness of organic constituent, thereby the suspended solids of sewage constitutes characteristic after the change pre-treatment, reduce the inorganic suspended solids quantity that enters the subsequent biological treatment system, obviously reduce the excess sludge productive rate of biological treatment system, improve the activity and the denitrification rate of active sludge, the bulk treatment effect and the operation stability of corresponding raising biological dephosphorize denitrification technology, the investment cost of reduction urban wastewater treatment firm engineering by a relatively large margin and the energy consumption material consumption level of operational process simultaneously.
Description of drawings:
Fig. 1 is just heavy fermentation pretreatment system structure 1 synoptic diagram of the present invention.
Fig. 2 is just heavy fermentation pretreatment system structure 2 synoptic diagram of the present invention.
Embodiment:
The sewage primary sedimentation treatment system that a kind of intensified suspended solid inorganic component is removed is at China town sewage ubiquity SS/BOD
5The practical situation that (perhaps explaining with SS/COD) ratio is higher and the emission standard of highly effective dephosphorizing denitrification require the design research and development.
This system by high loading preliminary sedimentation tank (1), be positioned at high loading preliminary sedimentation tank central position central tube water distributor (2), be installed on scraping of high loading preliminary sedimentation tank top and inhale mud portal structure (3), be installed on and scrape low speed thruster or the agitator (4) inhaled on the mud portal structure, be positioned at the effluent weir plate structure (5) on high loading preliminary sedimentation tank top and go out water collecting groove (6), be positioned at scraping of high loading preliminary sedimentation tank bottom and inhale outside mud structure (7) and the mud arranging device (8) and form; Central tube water distributor (2) is connected with the grid and the sand setting processing structures water outlet A of front end by pipeline, go out water collecting groove (6) and be connected with follow-up biological treatment structures B by pipeline, the outer arranging device (8) of mud is connected with follow-up sludge treatment structures C by pipeline and sludge pump.
This high loading just treatment process and the principle of work of heavy treatment system is: through the town sewage after grid and the sand setting processing, at first enter the middle and lower part of the high loading preliminary sedimentation tank (1) of this just heavy treatment system by connection line, carry out the water distribution uniformity of tangential direction by central tube water distributor (2), then by being installed on the low speed pushing effect of the thruster (4) on the portal structure (3), make sewage present the eddy flow that flows upward slowly with horizontal direction, make that inorganic component content is lower, the less relatively suspended solids (being that organism is a main ingredient) of proportion is with flowing on the current direction, overflows to out in water collecting groove (6) as should just sinking the water outlet of treatment system via weir plate structure (5) on the top of high loading preliminary sedimentation tank with water outlet and escape and enter follow-up biological dephosphorize denitrification technique unit; The suspended solids that inorganic component content is higher, proportion is relatively large (component that particularly contains trickle silt) is to the sedimentation of the bottom of high loading preliminary sedimentation tank, the mud that falls to the bottom is discharged from the high loading preliminary sedimentation tank with the outer arranging device (8) of mud by scraping suction mud structure (7), carries out follow-up processing and disposal.The design surface rate of load condensate of high loading preliminary sedimentation tank is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min.
Claims (8)
1. the sewage primary sedimentation treatment method removed of an intensified suspended solid inorganic component, it is characterized in that: through the town sewage after grid and the sand setting processing, at first enter the middle and lower part of high loading preliminary sedimentation tank by connection line, carry out the water distribution uniformity of tangential direction by the water inlet water distribution system, promote that sewage is presented and flow upward eddy flow with horizontal direction by low speed then, make that inorganic component content is lower, the less relatively suspended solids of proportion is with flowing on the current direction, escape and enter follow-up biological dephosphorize denitrification technique unit on the top of high loading preliminary sedimentation tank as water outlet that should just heavy treatment system with water outlet; The suspended solids that inorganic component content is higher, proportion is relatively large carries out follow-up processing and disposal to the sedimentation of the bottom of high loading preliminary sedimentation tank, discharge.
2. the sewage primary sedimentation treatment system removed of an intensified suspended solid inorganic component, it is characterized in that: described sewage primary sedimentation treatment system is by high loading preliminary sedimentation tank (1), be positioned at the water inlet water distribution system (2) of high loading preliminary sedimentation tank central position, be installed on scraping of high loading preliminary sedimentation tank top and inhale mud portal structure (3), be installed on and scrape the thruster of inhaling on the mud portal structure (4), be positioned at the effluent weir plate structure (5) on high loading preliminary sedimentation tank top and go out water collecting groove (6), be positioned at scraping of high loading preliminary sedimentation tank bottom and inhale mud structure (7) and outer arranging device structure facilities such as (8) composition of mud, wherein, central tube water distributor (2) is connected with the grid and the sand setting processing structures water outlet A of front end by pipeline, go out water collecting groove (6) and be connected with follow-up biological treatment structures B by pipeline, the outer arranging device (8) of mud is connected with follow-up sludge treatment structures C by pipeline and sludge pump.
3. the sewage primary sedimentation treatment method that intensified suspended solid inorganic component according to claim 1 is removed, it is characterized in that: the design surface rate of load condensate of above-mentioned high loading preliminary sedimentation tank is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min.
4. the sewage primary sedimentation treatment system that intensified suspended solid inorganic component according to claim 2 is removed, it is characterized in that: the design surface rate of load condensate of above-mentioned high loading preliminary sedimentation tank is 3～5m
3/ (m
2H), the design hydraulic detention time is 30～60min.
5. the sewage primary sedimentation treatment method that intensified suspended solid inorganic component according to claim 1 is removed, it is characterized in that, above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening, it goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of center drum water distributor is a horizontal direction 45 opening.
6. the sewage primary sedimentation treatment system that intensified suspended solid inorganic component according to claim 2 is removed, it is characterized in that, above-mentioned water inlet water distribution system (2) is the center drum water distributor of band nose cone or inclined to one side bottom opening, it goes out the inclined to one side bottom position in bottom that head piece is positioned at just heavy fermentation vat, and the hole of center drum water distributor is a horizontal direction 45 opening.
7. the sewage primary sedimentation treatment system that intensified suspended solid inorganic component according to claim 2 is removed, it is characterized in that: above-mentioned thruster (4) is low speed underwater scooter or agitator.
8. the sewage primary sedimentation treatment system that intensified suspended solid inorganic component according to claim 2 is removed is characterized in that: above-mentioned spoil disposal subsystem is inhaled mud structure (7) and outer arranging device (8) formation of mud by scraping, and adopts the pump suction and pumping to send the mode spoil disposal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028236A (en) * | 2019-06-03 | 2020-12-04 | 中国市政工程华北设计研究总院有限公司 | Method for improving biological activity of sludge by using primary sedimentation tank |
| CN114751616A (en) * | 2022-06-16 | 2022-07-15 | 中国市政工程华北设计研究总院有限公司 | Drainage pipeline sludge carbon source extraction system and method for on-line separation of organic and inorganic components |
| CN116040897A (en) * | 2023-03-30 | 2023-05-02 | 中国市政工程华北设计研究总院有限公司 | Method for synchronously extracting organic carbon source in situ by removing dirt from river sediment |
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| US4772307A (en) * | 1984-04-02 | 1988-09-20 | Jeno Kiss | Process for preparing an agricultural fertilizer from sewage |
| CN1188080A (en) * | 1997-01-13 | 1998-07-22 | 北京市市政设计研究院研究所 | Method for municipal sewage treatment by using biological adsorption and biological membrane filtering |
| CN1262240A (en) * | 1999-01-31 | 2000-08-09 | 曹曼 | Process for treating sewage in urban area |
| CN2448838Y (en) * | 2000-09-21 | 2001-09-19 | 上海佛欣爱建河道治理有限公司 | Urban underground pipeline type sewage treatment unit |
| CN2481705Y (en) * | 2001-06-11 | 2002-03-13 | 重庆市生华环保研究所 | Non-power domestic sewage intensified treating device |
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2010
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Patent Citations (5)
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| US4772307A (en) * | 1984-04-02 | 1988-09-20 | Jeno Kiss | Process for preparing an agricultural fertilizer from sewage |
| CN1188080A (en) * | 1997-01-13 | 1998-07-22 | 北京市市政设计研究院研究所 | Method for municipal sewage treatment by using biological adsorption and biological membrane filtering |
| CN1262240A (en) * | 1999-01-31 | 2000-08-09 | 曹曼 | Process for treating sewage in urban area |
| CN2448838Y (en) * | 2000-09-21 | 2001-09-19 | 上海佛欣爱建河道治理有限公司 | Urban underground pipeline type sewage treatment unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112028236A (en) * | 2019-06-03 | 2020-12-04 | 中国市政工程华北设计研究总院有限公司 | Method for improving biological activity of sludge by using primary sedimentation tank |
| CN114751616A (en) * | 2022-06-16 | 2022-07-15 | 中国市政工程华北设计研究总院有限公司 | Drainage pipeline sludge carbon source extraction system and method for on-line separation of organic and inorganic components |
| CN116040897A (en) * | 2023-03-30 | 2023-05-02 | 中国市政工程华北设计研究总院有限公司 | Method for synchronously extracting organic carbon source in situ by removing dirt from river sediment |
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| CN101898853B (en) | 2012-07-04 |
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Effective date of registration: 20170622 Address after: 300074 Hexi District Meteorological Observatory Road, Tianjin, No. 99 Patentee after: China public works North China design studies Zong Yuan company limited Address before: 300074 Hexi District Meteorological Observatory Road, Tianjin, No. 99 Patentee before: National City Water Supply and Drainage Engineering Technology Research Center |