CN102020400B - Medium and small town centralized domestic sewage treatment method and device - Google Patents
Medium and small town centralized domestic sewage treatment method and device Download PDFInfo
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- CN102020400B CN102020400B CN 201010599192 CN201010599192A CN102020400B CN 102020400 B CN102020400 B CN 102020400B CN 201010599192 CN201010599192 CN 201010599192 CN 201010599192 A CN201010599192 A CN 201010599192A CN 102020400 B CN102020400 B CN 102020400B
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Abstract
The invention relates to a medium and small town centralized domestic sewage treatment device. The device is composed of the following treatment processes: carrying out flow aeration sand setting to remove particles in water inflow, thus reducing organic matter content in set sand; trapping suspended matter in the water inflow by utilizing a sludge concentration tank sludge blanket, thus reducingfluctuation and water quality of water inflow; removing most of organic pollutant by utilizing an alga type hollow fiber membrane reactor and controlling aeration manner, thus improving ammonia nitrogen removal efficiency; irradiating and disinfecting effluent by ultraviolet ray and reducing addition amount of drug, thus avoding secondary pollution; and realizing device automation by PLC (programmable logic controller) program control and linkage of online monitoring instrument and device, thus reducing operating cost. The embodiment of the invention verifies that the device has high treatment efficiency on town domestic sewage.
Description
Technical field
The invention belongs to the energy-conserving and emission-cutting technology field, by improving treatment process and equipment and modular design, promote the application of centralized sewage treatment unit in the Small Urban biological sewage is processed, improve Small Urban domestic sewage treatment present situation.
Background technology
At present, it is ripe that domestic sewage processing method and equipment have been tending towards, such as oxidation ditch, CASS, SBR and MBR etc. commonly used, by the mode of biochemical and materialization combination, all can reach the treatment effect of expection.These techniques are when being used for big-and-middle-sized sewage work, owing to being equipped with perfect sewage collecting pipe network, the influent quality water yield is in relative steady state, and under professional's operational administrative, treatment system can the stable for extended periods of time operation.But domestic discrete distribution a large amount of natural villages and small towns, is subjected to fund limitation can not build on a large scale sewage collecting pipe network and big-and-middle-sized sewage work.Therefore, be necessary sewage water treatment method and equipment improvement to maturation, reduce treatment scale, exploitation is fit to the waste disposal plant of Small Urban.
The Small Urban sanitary sewage has that water quality and quantity fluctuation is large, ammonia nitrogen concentration is high and the characteristics such as the graininess organism is many, centralized sewage treatment unit overcomes the above problems emphatically, improve simultaneously the automatic operating level of device, solve the problem of professional operator's deficiency.
Summary of the invention
The objective of the invention is on traditional wastewater treatment process and Equipment Foundations, exploitation is fit to method and the suite of equipment of Small Urban sewage disposal, and makes it have simple and convenient operation and maintenance, running cost is low and treatment effect is stable characteristics.
Technical scheme of the present invention is: the centralized domestic sewage processing method of Small Urban, a kind of improvement type domestic sewage processing method and equipment, may further comprise the steps: 1), the spiral-flow aeration sand setting, spiral-flow aeration is set in settling pit, the sewage of the living horizontal flow velocity 0.2 ~ 0.3m/s of intaking, hydraulic detention time 40 ± 10s, available depth 1.0 ± 0,2m is along water (flow) direction, the single tube aerating apparatus is established in the pool wall both sides, increase the collision of suspended substance in the sanitary sewage water inlet, reduce organic content in the sand setting, and organic particulate matter is played certain crushing effect, original a large amount of microorganism is under the aeration effect in the water inlet, tentatively organism in the degraded water inlet reduces subsequent disposal facility hydraulic detention time approximately, the economy system investment; 2), (pretreatment section) carry out Sludge Bed and filter, flow rate control is at 0.4 ~ 0.7m/h.Sanitary sewage is through Sludge Bed in the sludge thickener, and suspended substance is further removed, and certain shock absorption is played in variation to influent quality.Water inlet is stirred and is taken away the sludge anaerobic aerogenesis, prevents mud caking floating; 3), aerobic section adopts immersion alga type (tubular fibre the other end free state) hollow fiber ultrafiltration membrane technique, centrifugation by tunica fibrosa is trapped in active sludge in the reactor, save the system sludge backflow, sludge concentration in the Effective Raise equipment, relative reduce the entering organic matter of water biological load, namely improved the equipment anti-shock portative power; 4), aerobic section adopts the subregion aeration, makes to form aerobic zone and aerobic area in the pond in, sewage forms circulation in reactor, improve the clearance of ammonia nitrogen in intaking; 5), the sterilization of effluent adopting ultraviolet irradiation, raising germ-killing efficiency and the secondary pollution of avoiding medicament disinfecting to cause.
The present invention can pass through the on-line monitorings such as liquid level, dissolved oxygen in conjunction with the PLC automatic control, and the start and stop of control pump and adjusting blower fan wind supply quantity are realized unattended.
But horizontal flow type grit chamber or other improvement type settling pit are staggered.Aeration intensity is controlled at 2 ~ 3m
3/ m
2Min or every cube of sewage 0.08 ~ 0.12m
3, make sewage form strong turbulent flow, collision between the particulate matter increases, the removal that rubbed of the organism of sand grain surface.
Sludge Bed is filtered
Settled sludge forms good sludge blanket in the sludge thickener under action of gravity, sewage enters at concentration basin 1/4 ~ 1/3 At The Height, be evenly distributed on whole aspect by water-distributing device, pass sludge blanket from bottom to top, larger suspended substance can be held back and remove by sludge blanket, removes to be partly dissolved organic matter.
Aerobic section subregion aeration, form aerobic section and anaerobism Duan Bingcun, namely utilize vertical partition plate that aerobic section is divided into two zones, and keep the upper and lower to be interconnected, form aerobic zone at a side aeration, opposite side is the non-aeration district, and simultaneously under the effect of the lifting of aeration and dividing plate, two zones form circulation.The aerobic zone muddy water mixed solution enters opposite side non-aeration district, and dissolved oxygen exhausts rear formation aerobic area, for favourable condition has been created in denitrogenation.
The aerobic zone Dissolved Oxygen concentration Control is at 1.5 ~ 2.0mg/L, and aeration intensity is 5 ~ 8m
3/ m
2H, the volumetric ratio of aerobic zone and aerobic area is 1:3 ~ 1:2.
The invention has the beneficial effects as follows: centralized sewage treatment unit adopting process is fit to Small Urban waste water control demand, and is easy and simple to handle, be easy to apply, and helps to improve the Small Urban sanitary sewage and lacks the present situation of effectively administering.By process modification, reduce cost of sewage disposal.Process stable effluent quality, reach the reclaimed water water quality requirement, but direct reuse is alleviated regional short water supply.
Embodiment
1) spiral-flow aeration sand setting
Adopt horizontal flow type grit chamber simple in structure to improve horizontal flow velocity 0.2 ~ 0.3m/s, hydraulic detention time 40s, available depth 1.0m.Along water (flow) direction, the single tube aerating apparatus is established in the pool wall both sides, is staggered.Aeration intensity is controlled at 2 ~ 3m
3/ m
2, make sewage form strong turbulent flow, collision between the particulate matter increases, the removal that rubbed of the inorganics of sand grain surface.
2) Sludge Bed is filtered
Settled sludge forms good sludge blanket in the sludge thickener under action of gravity, sewage enters at concentration basin 1/4 ~ 1/3 At The Height, be evenly distributed on whole aspect by water-distributing device, pass sludge blanket from bottom to top, flow rate control is at 0.4 ~ 0.7m/h, larger suspended substance can be held back and remove by sludge blanket, and mud also has certain adsorption, removes to be partly dissolved organic matter.Muddy water mixed solution has good shock absorption in the sludge thickener simultaneously, can reduce the influent quality fluctuation to the impact of subsequent treatment section.
3) aerobic section half range aeration forms aerobic section and anaerobism Duan Bingcun, improves denitrification effect
Utilize dividing plate that aerobic section is divided into two zones, and keep the upper and lower to be interconnected, form aerobic zone at a side aeration, under the effect of the lifting of aeration and dividing plate, two zones form circulation simultaneously.The aerobic zone muddy water mixed solution enters opposite side, loses air supply, and dissolved oxygen exhausts rear formation aerobic area, for favourable condition has been created in denitrogenation.The nitrification and denitrification denitrogenation that sewage removes to finish in the alternate cycles process ammonia nitrogen in aerobic zone and anaerobism.The aerobic zone Dissolved Oxygen concentration Control is at 1.5 ~ 2.0mg/L, and aeration intensity is 5 ~ 8m
3/ m
2H, the volumetric ratio of aerobic zone and aerobic area is 1:3 ~ 1:2.
4) disinfection by ultraviolet light
The ultraviolet ray of wavelength about 260nm has stronger deactivation to bacterium, can avoid adding strong oxidizing property
Sterilant causes secondary pollution, and reduces the sterilization expense.The uv sterilisation set of time is 5s.
5) automatization control
Combine with equipment interlocking and PLC time variable control by on-line monitoring equipment such as liquidometer, dissolved oxygen instruments, the running status of the equipment such as pump and blower fan in the control waste disposal plant, especially adjust the aeration air quantity, reach the purpose of automated system operation and saving running cost.
The process of processing is as follows:
Enter sludge thickener behind the sanitary sewage process spiral-flow aeration sand setting, under the crown_interception of sludge blanket, further remove the suspended substance in the water inlet.The water outlet of concentration basin top enters Aerobic Pond, is removed at the aerobic zone organism, and mineralized nitrogen is nitric nitrogen simultaneously.At aerobic area, nitric nitrogen is converted into nitrogen and overflows under the denitrifying bacteria effect.By membrane sepn, aerobic section water outlet reuse behind uv sterilisation.
The mud that aerobic section produces regularly enters sludge thickener through sludge pump, deals carefully with after the dehydration of sludge thickener spoil disposal.
Embodiment 1
Design 50m
31 of the sewage treatment unit of/h processing power is used for certain commercial building sanitary sewage disposal, floor space 150m
2, process forward backward averaging water quality as follows.
Service data shows, centralized sewage treatment unit is all higher to the clearance of turbidity, BOD5, ammonia nitrogen and amount of total colibacillus, processes effluent quality and reaches urban life miscellaneous water water quality standard, being back to flush the toilet and the vehicle flushing.
Device moves 30 days continuously, and installing total power consumption variable is 10440kW.h, and the conversion average current drain is 0.29kW.h/ ton water.
Embodiment 2
Design 100m
31 of the sewage treatment unit of/h processing power is used for certain residential area sanitary sewage disposal, floor space 270m
2, process forward backward averaging water quality as follows.
Process effluent quality and reach urban life miscellaneous water water quality standard, be back to subdistrict greening and flushing supply.
Device moves 30 days continuously, and installing total power consumption variable is 21600kW.h, and the conversion average current drain is 0.30kW.h/ ton water.
Embodiment 3
Design 60m
31 of the sewage treatment unit of/h processing power is used for certain residential area sanitary sewage disposal, floor space 180m
2, process forward backward averaging water quality as follows.
Process effluent quality and reach urban life miscellaneous water water quality standard, be back to subdistrict greening and flushing supply.
Device moves 30 days continuously, and installing total power consumption variable is 13392kW.h, and the conversion average current drain is 0.31kW.h/ ton water.
By embodiment as can be known, the centralized sewage treatment unit of Small Urban disclosed by the invention has broad application prospects, and can remove preferably the BOD in the town domestic sewage
5, the principal pollutant such as turbidity, bacterium and ammonia nitrogen, and realize effluent reuse.Level of automation is high, stable effluent quality, and the current consumption that moves with conventional treatment method and equipment compares, and average current drain can reduce about 10%.The large-scale promotion of present technique is used, and is significant.
Claims (7)
1. the centralized domestic sewage processing method of Small Urban, it is characterized in that may further comprise the steps: 1) to sanitary sewage spiral-flow aeration sand setting, spiral-flow aeration is set in settling pit, the sanitary sewage horizontal flow velocity 0.2～0.3m/s of intaking, hydraulic detention time 40 ± 10s, available depth 1.0 ± 0.2m is along water (flow) direction, and the single tube aerating apparatus is established in the pool wall both sides, increases the collision of suspended substance in the sanitary sewage water inlet; 2) sanitary sewage is carried out Sludge Bed in sludge thickener and filter, flow rate control is at 0.4～0.7m/h; Sanitary sewage is through Sludge Bed in the sludge thickener, and suspended substance is further removed, and certain shock absorption is played in variation to influent quality; Water inlet is stirred and is taken away the sludge anaerobic aerogenesis, prevents mud caking floating; 3) aerobic section adopts the immersion alga type hollow fiber ultrafiltration membrane to separate, and by tunica fibrosa active sludge is trapped in the reactor; 4) aerobic section adopts the subregion aeration, makes to form aerobic zone and aerobic area in the pond, and sanitary sewage forms circulation in reactor; Concrete mode is: aerobic section subregion aeration forms aerobic section and anaerobism Duan Bingcun, namely utilize vertical partition plate that aerobic section is divided into two zones, and keep the upper and lower to be interconnected, form aerobic zone at a side aeration, opposite side is the non-aeration district, simultaneously under the effect of the lifting of aeration and dividing plate, form circulation in two zones.
2. the centralized domestic sewage processing method of Small Urban according to claim 1 is characterized in that settling pit is horizontal flow type grit chamber or other improvement type settling pit.
3. the centralized domestic sewage processing method of Small Urban according to claim 1 is characterized in that the pool wall both sides establish the single tube aerating apparatus and be staggered; Aeration intensity is controlled at 2～3m
3/ m
2H or every cube of sewage 0.08～0.12m
3, make sewage form strong turbulent flow, the collision between the particulate matter increases.
4. the centralized domestic sewage processing method of Small Urban according to claim 1 is characterized in that sanitary sewage enters at concentration basin 1/4～1/3 At The Height, is evenly distributed on whole aspect by water-distributing device, passes sludge blanket from bottom to top.
5. the centralized domestic sewage processing method of Small Urban according to claim 1 is characterized in that the aerobic zone Dissolved Oxygen concentration Control at 1.5～2.0mg/L, and aeration intensity is 5～8m
3/ m
2H, the volumetric ratio of aerobic zone and aerobic area is 1:3～1:2.
6. the centralized domestic sewage processing method of Small Urban according to claim 1 is characterized in that the sterilization of effluent adopting ultraviolet irradiation.
7. the centralized domestic sewage processing method of Small Urban according to claim 4 is characterized in that the sterilization of effluent adopting ultraviolet irradiation.
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|---|---|---|---|
| CN 201010599192 CN102020400B (en) | 2010-12-22 | 2010-12-22 | Medium and small town centralized domestic sewage treatment method and device |
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|---|---|---|---|
| CN 201010599192 CN102020400B (en) | 2010-12-22 | 2010-12-22 | Medium and small town centralized domestic sewage treatment method and device |
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| CN102020400A CN102020400A (en) | 2011-04-20 |
| CN102020400B true CN102020400B (en) | 2013-10-16 |
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| CN103341285B (en) * | 2013-07-16 | 2015-04-15 | 哈尔滨工业大学 | Advection sedimentation/immersion type ultrafiltration integrated water treatment device |
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| CN101450283A (en) * | 2008-12-18 | 2009-06-10 | 南京中电联环保工程有限公司 | Alga type hollow fiber ultrafiltration membrane filter device |
| JP2009183901A (en) * | 2008-02-07 | 2009-08-20 | Metawater Co Ltd | Membrane filtration concentration method of coagulation treated water and coagulated waste muddy water |
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2010
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| JP2003334592A (en) * | 2002-05-20 | 2003-11-25 | Kubota Corp | Sewage treatment apparatus |
| SG125100A1 (en) * | 2003-01-09 | 2006-09-29 | Kuraray Co | Waste water tratment method |
| CN101269873A (en) * | 2007-03-22 | 2008-09-24 | 天津市天友建筑设计有限公司 | Method and apparatus for recycling membrane-bioreactor sewage water |
| JP2009183901A (en) * | 2008-02-07 | 2009-08-20 | Metawater Co Ltd | Membrane filtration concentration method of coagulation treated water and coagulated waste muddy water |
| CN101289263A (en) * | 2008-06-13 | 2008-10-22 | 哈尔滨工业大学 | Integral sewage disposal process for strengthening sludge filtrating technology |
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Address after: 211102 Jiangning City, Nanjing Province, the integrity of the road No. 1800, Applicant after: Nanjing CEC Environmental Protection Co., Ltd. Address before: 211102 Jiangning City, Nanjing Province, the integrity of the road No. 1800, Applicant before: Nanjing CEC Environmental Protection Co., Ltd. |
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Address after: 211102 Jiangning City, Nanjing Province, the integrity of the road No. 1800, Patentee after: NANJING CEC ENVIRONMENTAL PROTECTION CO., LTD. Address before: 211102 Jiangning City, Nanjing Province, the integrity of the road No. 1800, Patentee before: Nanjing CEC Environmental Protection Co., Ltd. |