CN103265152A - Domestic sewage treatment method - Google Patents
Domestic sewage treatment method Download PDFInfo
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- CN103265152A CN103265152A CN2013102344521A CN201310234452A CN103265152A CN 103265152 A CN103265152 A CN 103265152A CN 2013102344521 A CN2013102344521 A CN 2013102344521A CN 201310234452 A CN201310234452 A CN 201310234452A CN 103265152 A CN103265152 A CN 103265152A
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Abstract
The invention relates to a domestic sewage treatment method, belonging to the field of sewage treatment. The process flow of the method comprises the steps of collecting domestic sewage, coarsely filtering grilles, carrying out mud-sand precipitation and sand-water separation, carrying out oil separation precipitation, carrying out biological treatment, finely filtering and backwashing, and is characterized in that the step of coarsely filtering grilles comprises coarse grille filtering and fine grille filtering, wherein the spacing distance of grids of a coarse grille is 20 mm, and the spacing distance of grids of a fine grille is 5 mm. The method has the advantages that the domestic sewage treatment capacity is increased, the sewage emission is reduced, the secondary pollution to the environment caused by backwashing water is avoided, the industrial new water purchase cost is saved, and the dilution effect on a domestic sewage incoming ingredient caused by the backwashing water is reduced, thus the treatment effect is improved.
Description
Technical field
The invention belongs to sewage treatment area.
Background technology
The general flow of sanitary sewage disposal is grid (removing big floating matter)--biochemical treatment system (removing pollutant components such as nitrogen, phosphorus, COD in the water)--filtering (further removing suspended substance in the water)---user, wherein filter and adopt filter tank or strainer, the filter tank is held back pollutent and is acquired a certain degree and need carry out backwash, general backwash in 8-24 hour once, backwash water adopts the water after filtering, and the water after the backwash effluxes or enter the secondary treatment of grid front end.
Backwash water effluxes and causes the outer discharge capacity of waste water to increase, and becomes the secondary pollution source, and needs various channels, water pump etc. in the sanitary sewage collection process, if efflux, causes the waste of water resources, the energy, equipment; If backwash water enters grid front end secondary recovery and handles, because nutritive substances such as the nitrogen that bacterium needs in the various biochemical treatment systems in the backwash water, phosphorus, COD have been removed, the adding of this part water dilutes nutrient concentration in the water, and because the domestic sewage processing system treatment scale is certain, the adding of this part water, actual is constantly circulation in system, cause the minimizing of sanitary sewage disposal yield, the usefulness of total system is reduced, be unfavorable for the reasonable utilization with water resources finished of environmental protection index.
Summary of the invention
The present invention seeks to overcoming the deficiency of above-mentioned prior art, provide a kind of and can effective and reasonablely utilize sanitary sewage filter tank backwash water, increase domestic sewage processing system treatment capacity and the water treatment method that improves treatment effect.
The present invention sets up an inclined-plate clarifying basin at existing sewage disposal device, the dosing precipitation process is carried out in the collection of water after the backwash, remove suspended substance in the water, reach the industrial cooling water standard and be back to production, improve domestic sewage processing system and handle quality, increase the sanitary sewage yield.---grid coarse filtration---silt particle precipitation and sand water sepn---oil removal precipitation----biological treatment---finly filtration---backwash that technical process of the present invention is: sanitary sewage is collected.
Described grid coarse filtration: comprise that coarse rack filters and fine fack filters, the interval of grid strip of coarse rack is 20mm, is used for the big floating matter of interception, such as plastics bag, melon and fruit; The interval of grid strip of fine fack is 5mm, is used for interception particulate matter and little floating matter.Foreign material under holding back are sent to household garbage field and handle after the expeller squeezing.Water inlet suspended substance 200-400mg/l, chemical oxygen demand COD 200-250 mg/l, ammonia nitrogen 30-50 mg/l.
Chemical oxygen demand (COD) (COD) refers under certain strict condition, and the reducing substances in the water is under the effect of the strong oxidizer that adds, and the quantity of the oxygenant that consumes during oxidized the decomposition is represented with the mg/L of oxygen.Chemical oxygen demand (COD) has reflected the degree that polluted by reducing substances, these materials comprise organism, nitrite, ferrous salt, sulfide etc., but the quantity of inorganic reduction material is little relatively in general water and the waste water, and be very general by Organic pollutants, therefore, COD can be used as a composite target of organic substance relative content.
Described silt particle precipitation and sand water sepn: settling pit adopts the eddy current settling pit, and sewage enters circular settling pit by inlet channel from tangential direction, and the eddy current by current produce separates sand grains, to reach the desanding purpose from water under action of centrifugal force.Adorn one and inhale the sand submersible sewage pump in each sand hopper, the silt particle in the sand hopper is sucked grit water separator carry out the sand water sepn, the silt particle of extruding stem walkie fork lift truck in factory moves away, and the sewage of extrusion is handled again from flowing back into the lifting suction well.
Described oil removal precipitation-: oil partiting precipitation pool is used for removing oil and the good suspended substance of settleability of waste water.
Described biological treatment: by cultivating different microorganisms, utilize microbial growth, remove nitrogen, phosphorus, COD pollution substance in the water through technologies such as anoxic, anaerobism, aerobic and precipitations, go out water suspension to drop to below the 10mg/l, below the COD60 mg/l, below ammonia nitrogen 15 mg/l.Biological treatment is activated sludge process.
Described finly filtration: adopt the filter tank to utilize the water artesian pressure to filter, reduce the water pump pressure-raising, only to remove suspended substance in the water, go out water suspension and drop to below the 5mg/l, enter follow-up embrane method advanced treatment or use as industrial fresh water.
Filtering basin are held back a large amount of pollutents on the filtrate after operation for some time, need carry out backwash, and backwash water adopts filter back water, backwash water enters filtering basin from water tank, the backwash water yield is 10% of system design treatment scale, and the water suspension after the backwash reaches 200-300mg/l, flows into a suction well certainly, place submersible pump in the well, according to suction well liquid level variable frequency control, the water that submersible pump is extracted out is sent to inclined-plate clarifying basin, and adopting swash plate mainly is to reduce the settling tank volume, improve sedimentation effect, reduce investment.Add flocculation agent, coagulant aids raising treatment effect in the settling tank water inlet.Settling tank goes out below water suspension 10 mg/l, delivers to production unit with lift pump and uses as industrial fresh water, reduces new water amount of purchase.Lift pump also adopts variable frequency control.
The instantaneous water yield was big when the characteristics of filter tank backwash were backwash, and the time is short, every backwash 20-30 minute, for the frequency that reduces the personnel to operate, reclaim the water pump, dosing pump etc. of backwash water and all will realize automatic control, according to the water yield or the timely auto-control of liquid level.
The present invention is applicable to sanitary sewage filter tank (strainer) backwash water recovery processing technique.Increase the sanitary sewage disposal amount, reduced the wastewater disposition amount and stop backwash water to second environmental pollution, saved the industrial fresh water buying expenses, also reduced backwash water sanitary sewage is come the diluting effect of water constituent, improved treatment effect.
Embodiment
The inventive method is on probation in Taiyuan iron and steel group company (abbreviation Taiyuan Iron and Steel Co.) domestic sewage processing system engineering.What Taiyuan Iron and Steel Co. project water source adopted is Shahe, north, Taiyuan City, Bei Jian river and area, sharp lawn sanitary sewage, owing to being open channel and being located in the north, therefore foreign material are many in the water, quantity of sand and mud is big, and there is the draining of factories and miness to enter on the way, therefore BOD, COD ratio have only 1:3 in the water, do not reach the 1:2 standard.
Described sanitary sewage is collected: because sanitary sewage is the sanitary sewage that resident, factories and miness are discharged, enter runner from different positions, deliver to sanitary sewage disposal factory after the newly-built barrage in runner downstream, flashboard, water pump, pipeline are collected sanitary sewage.
Described grid coarse filtration: at first be coarse rack, interval of grid strip is 20mm, tackles big floating matter, such as plastics bag, melon and fruit; Be fine fack then, interval of grid strip is 5mm, interception particulate matter and little floating matter.Foreign material under holding back are sent to household garbage field and handle after the expeller squeezing.Water inlet suspended substance 200-400mg/l, COD200-250 mg/l, ammonia nitrogen 30-50 mg/l.
Described silt particle precipitation and sand water sepn: settling pit adopts the eddy current settling pit, and sewage enters circular settling pit by inlet channel from tangential direction, and the eddy current by current produce separates sand grains, to reach the desanding purpose from water under action of centrifugal force.Adorn one and inhale the sand submersible sewage pump in each sand hopper, the silt particle in the sand hopper is sucked grit water separator carry out the sand water sepn, the silt particle of extruding stem walkie fork lift truck in factory moves away, and the sewage of extrusion is handled again from flowing back into the lifting suction well.
Described oil removal precipitation-: oil partiting precipitation pool is used for removing oil and the good suspended substance of settleability of waste water.
Described biological treatment: comprise activated sludge process (MSBR), trickling filter method, aeration and the bacterial classification (for example anaerobic grain sludge) of irrigating the anaerobism method.
By cultivating different microorganisms, utilize microbial growth, remove pollution substances such as nitrogen, phosphorus, COD in the water through anoxic, anaerobism, aerobic and depositing technology, go out water suspension to drop to below the 10mg/l, below the COD60 mg/l, below ammonia nitrogen 15 mg/l.
Described finly filtration: adopt the filter tank to utilize the water artesian pressure to filter, reduce the water pump pressure-raising, remove suspended substance in the water, go out water suspension and drop to below the 5mg/l, enter follow-up embrane method advanced treatment or use as industrial fresh water.
Adopted coarse rack, fine fack to remove large and small floating matter and particulate matter in the water, adopt sedimentation basin and oil trap further to remove water small particles thing and oil, adopt the MSBR biological treatment to improve automatic control level, reduce floor space, improve impact resistance and treatment effect, adopt the filter tank further to reduce suspended substance in the water, satisfy follow-up embrane method and handle requirements in water quality.50000 tons/day of sanitary sewage designing treatment scales, wherein backwashing filter water 4000-5000 ton/sky supplies 45,000 ten thousand tons outward.The filter tank has 8,6250 tons/day of each processing poweies, and every day, backwash twice, and the air water hybrid mode is adopted in each backwash, and each 30 minutes, backwash water adopted the water behind the filter.
Water tank, inclined-plate clarifying basin etc. have been increased for this reason, water gravity flow after the backwash enters a suction well, 200 cubic metres of volumes, the submersible pump of two 22KW is installed in the suction well, according to the liquid level variable frequency control, send into an inclined-plate clarifying basin, add flocculation agent and coagulant aids post precipitation, treated water can be used as industrial fresh water or water flowers, road depositing dust etc.
System of the present invention is stable, and biochemical treatment system is respond well, significantly reduces water resources, has improved the sewage reuse amount simultaneously, for society, made contribution for environmental protection.
Sanitary sewage filter tank (strainer) backwash water does not enter the system source, takies system processing power, or does not efflux, but handle the back recycling through other physics, chemical process.
Claims (1)
1. domestic sewage processing method,---grid coarse filtration---silt particle precipitation and sand water sepn---oil removal precipitation----biological treatment---finly filtration---backwash that its technical process is that sanitary sewage is collected, it is characterized in that described grid coarse filtration: comprise that coarse rack filters and fine fack filters, the interval of grid strip of coarse rack is 20mm; The interval of grid strip of fine fack is 5mm;
Described silt particle precipitation and sand water sepn: settling pit adopts the eddy current settling pit, and sewage enters circular settling pit by inlet channel from tangential direction, and the eddy current by current produce separates sand grains, to reach the desanding purpose from water under action of centrifugal force; In each sand hopper, adorn one and inhale the sand submersible sewage pump, the silt particle in the sand hopper is sucked grit water separator carry out the sand water sepn;
Described biological treatment is activated sludge process;
Described finly filtration: adopt the filter tank to utilize the water artesian pressure to filter, use water suspension and drop to below the 5mg/l;
Filtering basin are held back a large amount of pollutents on the filtrate after operation for some time, carry out backwash, backwash water adopts filter back water, backwash water enters filtering basin from water tank, the backwash water yield is 10% of system design treatment scale, water suspension after the backwash reaches 200-300mg/l, from flowing into a suction well, place submersible pump in the well, according to suction well liquid level variable frequency control, the water that submersible pump is extracted out is sent to inclined-plate clarifying basin, adds flocculation agent in the inclined-plate clarifying basin water inlet, coagulant aids, settling tank goes out below water suspension 10 mg/l, delivers to production unit with lift pump and uses as industrial fresh water.
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| CN2013102344521A CN103265152A (en) | 2013-06-14 | 2013-06-14 | Domestic sewage treatment method |
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| CN2013102344521A CN103265152A (en) | 2013-06-14 | 2013-06-14 | Domestic sewage treatment method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291536A (en) * | 2014-10-31 | 2015-01-21 | 苏州腾纳环保科技有限公司 | Purified water treatment process |
| CN104291536B (en) * | 2014-10-31 | 2017-01-04 | 苏州腾纳环保科技有限公司 | A kind of purification water treatment technology |
| CN107473472A (en) * | 2017-09-29 | 2017-12-15 | 项心力 | A kind of method based on physical chemistry coacervation processing sewage |
| CN108409069A (en) * | 2018-06-01 | 2018-08-17 | 河池学院 | A kind of rural domestic sewage treatment system |
| CN109650469A (en) * | 2018-12-26 | 2019-04-19 | 北京首创清源环境科技有限公司 | A kind of sewage pre-treatment device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035554A (en) * | 2000-07-24 | 2002-02-05 | Nkk Corp | Method for treating water and its apparatus |
| CN1554603A (en) * | 2003-12-23 | 2004-12-15 | 南开大学 | Process and method for treating city waste warter |
| CN201184059Y (en) * | 2008-01-29 | 2009-01-21 | 中建国际（深圳）设计顾问有限公司 | Filter device backwashing water recovery apparatus |
| CN101659489A (en) * | 2008-08-26 | 2010-03-03 | 王充 | Method for treating municipal domestic sewage |
| CN101863577A (en) * | 2010-05-28 | 2010-10-20 | 深圳市水务(集团)有限公司 | Filter back washing water recovery processing method and membrane filtration system thereof |
| JP2011183320A (en) * | 2010-03-09 | 2011-09-22 | Metawater Co Ltd | Backwashing method for membrane filter |
-
2013
- 2013-06-14 CN CN2013102344521A patent/CN103265152A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002035554A (en) * | 2000-07-24 | 2002-02-05 | Nkk Corp | Method for treating water and its apparatus |
| CN1554603A (en) * | 2003-12-23 | 2004-12-15 | 南开大学 | Process and method for treating city waste warter |
| CN201184059Y (en) * | 2008-01-29 | 2009-01-21 | 中建国际（深圳）设计顾问有限公司 | Filter device backwashing water recovery apparatus |
| CN101659489A (en) * | 2008-08-26 | 2010-03-03 | 王充 | Method for treating municipal domestic sewage |
| JP2011183320A (en) * | 2010-03-09 | 2011-09-22 | Metawater Co Ltd | Backwashing method for membrane filter |
| CN101863577A (en) * | 2010-05-28 | 2010-10-20 | 深圳市水务(集团)有限公司 | Filter back washing water recovery processing method and membrane filtration system thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李日清等: "PLC在生活污水处理系统中的应用", 《科技情报开发与经济》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104291536A (en) * | 2014-10-31 | 2015-01-21 | 苏州腾纳环保科技有限公司 | Purified water treatment process |
| CN104291536B (en) * | 2014-10-31 | 2017-01-04 | 苏州腾纳环保科技有限公司 | A kind of purification water treatment technology |
| CN107473472A (en) * | 2017-09-29 | 2017-12-15 | 项心力 | A kind of method based on physical chemistry coacervation processing sewage |
| CN108409069A (en) * | 2018-06-01 | 2018-08-17 | 河池学院 | A kind of rural domestic sewage treatment system |
| CN109650469A (en) * | 2018-12-26 | 2019-04-19 | 北京首创清源环境科技有限公司 | A kind of sewage pre-treatment device |
| CN109650469B (en) * | 2018-12-26 | 2023-12-19 | 北京首创清源环境科技有限公司 | Sewage pretreatment device |
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Application publication date: 20130828 |