CN103011490A - Technology for distributed treatment on domestic sewage from small rural towns - Google Patents
Technology for distributed treatment on domestic sewage from small rural towns Download PDFInfo
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- CN103011490A CN103011490A CN2011102852021A CN201110285202A CN103011490A CN 103011490 A CN103011490 A CN 103011490A CN 2011102852021 A CN2011102852021 A CN 2011102852021A CN 201110285202 A CN201110285202 A CN 201110285202A CN 103011490 A CN103011490 A CN 103011490A
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Abstract
The invention belongs to the field of sewage treatment and relates to a technology for distributed treatment on domestic sewage from small rural towns. The technology comprises that domestic sewage is treated orderly by a grid, a regulating tank, a magnetic separation device and a constructed wetland and then forms product water. The technology has the advantages of small floor space, short flow, convenient equipment operation, low operation cost, no secondary pollution and flexible treatment on a load change, and is suitable for being popularized in small rural towns of China.
Description
Technical field
The invention belongs to sewage treatment area, particularly relate to a kind of Small Towns dispersant type domestic wastewater treatment process.
Background technology
China adds up to 45412 in small towns, 739980 of villagers' committees, and rural amount 23692.7 ten thousand families, the rural population reaches 91,960 ten thousand people.According to measuring and calculating, annual more than 80 hundred million tons of the sanitary sewages that produce in national rural area, national livestock and poultry cultivation ight soil year generation is 2.45 times of industrial solid castoff generation at 25～3,000,000,000 tons.Overwhelming majority village does not have discharge conduit and Sewage treatment systems, sanitary sewage arbitrarily discharges, severe contamination the Rural areas living environment, the water bodys such as most areas river, rural area, lake are generally polluted, drinking-water quality is subject to safely serious threat, directly the harm peasant's is healthy, have a strong impact on the environmental health of Rural areas, very easily cause generation and the propagation of some epidemic diseases, the financial loss that Rural Environmental Problem causes every year surpasses hundred billion yuan, and China's rural environment and ecologic regime are troubling.
Aspect treatment technology, developed country mainly with the city domestic sewage treatment process for being mainly used to rural domestic sewage treatment, such as SBR, oxidation ditch, BAF etc.; Australia's employing " FILTER " sewage disposal and recycling system, Japan adopt small-sized purifying domestic sewage groove technology (biomembrance process, Shi Jingfa, bio-toilet).
Domestic had many technical schemes for rural domestic sewage treatment to propose at present, such as Anaerobic Digestion technology, Artificial Wetland Techniques, soil filtration technology and integrated device treatment technology etc.Simultaneously, some investigators also propose or have tested knockdown rural sewage treatment scheme, such as " processing of soil one artificial wet land system country sewage distributing ", " anaerobism pre-treatment one Combination System of Constructed Wetland ", " stabilization pond one Combination System of Constructed Wetland " and " purifying biogas generating pit one stabilization pond systems " etc.But most schemes can't be promoted the use of in the rural area because treatment effect is not good, technical requirements is high, investment is many, floor space is stopped up greatly and easily and have the reason such as secondary pollution.Country sewage fails really to be effectively addressed, and is the one of the main reasons that China's water surrounding continues deterioration.Therefore, really solve country sewage and effectively process problem, its method must satisfy takes up an area province, less investment, construction and running cost is low, non-secondary pollution, can tackle flexibly the technique of processing the conditions such as load variations.
Summary of the invention
The purpose of this invention is to provide a kind of Small Towns dispersant type domestic wastewater treatment process, it is characterized in that: sanitary sewage is successively through water outlet behind grid, equalizing tank, magnetic separation, the artificial swamp.
This technique enters the drop oxygenation and contact oxidation pond after also comprising the magnetic separation again.
Magnetic separator in the magnetic separation technique can be magnetic disk separator, magnetic bar separator or high gradient magnetic separator.
Through the effluent quality SS≤10mg/l after the magnetic separation, TP≤0.5mg/l, oil≤5mg/l, COD≤150mg/l.
Magnetic separator in the magnetic separation technique is magnetic disk separator.The reaction times that sewage enters magnetic disk separator is 3-5 minute.
The Small Towns sanitary sewage has dispersed high, organic and solid pollution substrate concentration high, and single treatment process can't realize the effective processing to country sewage; Combined treatment process of the prior art is because the not mature enough or economic reason of technology can't be promoted use.Therefore, the invention discloses a kind of novel domestic sewage in rural areas by using integration ecological treatment process, in the conventional pretreatment technology, improve, can effectively overcome poor processing effect, investment that present treatment process exists large, take up an area mainly with and the shortcoming such as very flexible, realize the effective processing to the domestic sewage in rural areas by using of different load, varying environment condition.In addition, some valuable byproducts such as vegetables, flowers also can be produced simultaneously in the Ecological Disposal unit.
Technical scheme of the present invention has following advantage:
1, the present invention have take up an area to economize, flow process is short, operation of equipment is convenient, running cost is low, non-secondary pollution, can tackle flexibly advantages such as processing load variations, is to be fit to the ecological type sewage treatment process that Chinese countryside samll cities and towns apply.
When 2, the present invention processes the Small Towns sanitary sewage TP, NH3-N, TN are all had good effect, its sludge yield is little, and water outlet can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) requirement of primary standard.
3, magnetic separation technique generally is applicable to the factory effluent of the enterprises such as metallurgy, mine, does not also have at present bibliographical information that magnetic separation technique is applicable to the Small Towns sanitary sewage.
4, the present invention is on the traditional technology basis of Small Towns sanitary sewage disposal, increase the magnetic separating step, can alleviate the burden of second-stage treatment, increased substantially water outlet water quality, the stably reaching standard of sewage is sent in assurance to some other department, for the Small Towns sewage reuse is laid good basis.
5, the magnetic disc separation effluent purifying device has the characteristics such as hydraulic detention time is short, floor space is little, the processing water yield is large, working cost is low, technical process is short, the tradition magnetic separation technique generally all is useful in the trade effluent, the inventor has solved the problems such as treatment effect is not good in the present Small Towns sanitary sewage technique, technical requirements is high, investment is high, floor space is large by during magnetic separation technique is applicable.
6, the contriver is by art breading Small Towns dispersant type domestic wastewater of the present invention, and effluent characteristics is very high, and water outlet SS is minimum to be lower than below the 10mg/L; The sludge concentration of discharging is high, and water ratio≤92% can omit sludge concentration device, directly enters sludge dewatering equipment and processes.
Description of drawings
Fig. 1 is that the present invention processes Small Towns dispersant type domestic wastewater processing technological flow one;
Fig. 2 is that the present invention processes Small Towns dispersant type domestic wastewater processing technological flow two.
Embodiment
For clearer explanation goal of the invention of the present invention and technical scheme, below in conjunction with accompanying drawing and embodiment the present invention is further elaborated.
As shown in Figure 1, the present invention comprises pre-treatment and two processing units of advanced treatment; Sewage is realized qualified discharge through after these two processing unit processes successively; Pretreatment unit is to utilize traditional grid, equalizing tank, magnetic separation system that the Small Towns sanitary sewage is carried out coagulation to remove most of organism and solid pollutant.Artificial swamp is advanced treatment unit.
Sanitary sewage at first passes through by many groups of metal grizzly bar and the system frameworks that parallel, tilt to be installed in the thickness grid of grid spacing 16-40mm in the channel of water, with removing the thicker suspended substance that may stop up water pump assembly and pipeline valve, and guarantee that whole Sewage treatment systems can normally move.Secondly sewage enters equalizing tank, in order to make the normal operation of pipe duct and structures, is not subjected to the impact of sewage peak flow or change in concentration, regulates pH value of sewage water, water temperature, and the preaeration effect is arranged, and also can be used as the accident draining.Again flow in the magnetic separation system, give magnetic with not magnetic suspended substance in the sanitary sewage, form little magnetic floc sedimentation by mixed flocculation, floc sedimentation is adsorbed, salvages under the high-strength magnetic intensity of field, thereby finished the fast purification process of water body, effluent quality SS≤10mg/l, TP≤0.5mg/l, oil≤5mg/l, COD≤150mg/l.
Introduce artificial swamp through after the pre-treatment, further advanced treatment is removed nitrogen phosphorus, and dissolved organic matter then can be decomposed, remove by the biomembranous absorption of root system of plant, absorption and biological metabolism degradation process in the sewage.By the waterplant of the economic class of plantation, can produce good economic benefit in the artificial swamp.
As shown in Figure 2, the present invention comprises pre-treatment, biochemical treatment and three processing units of advanced treatment successively; Sewage is realized qualified discharge through after these three processing unit processes successively; Pretreatment unit is to utilize traditional grid, equalizing tank, magnetic separation system that domestic sewage in rural areas by using is carried out coagulation to remove most of organism and solid pollutant.The biochemical treatment unit is aerobic treatment.Artificial swamp is advanced treatment unit.
Sanitary sewage at first passes through by many groups of metal grizzly bar and the system frameworks that parallel, tilt to be installed in the thickness grid of grid spacing 16-40mm in the channel of water, with removing the thicker suspended substance that may stop up water pump assembly and pipeline valve, and guarantee that whole Sewage treatment systems can normally move.Secondly sewage enters equalizing tank, in order to make the normal operation of pipe duct and structures, is not subjected to the impact of sewage peak flow or change in concentration, regulates pH value of sewage water, water temperature, and the preaeration effect is arranged, and also can be used as the accident draining.Again flow in the magnetic separation system, give magnetic with not magnetic suspended substance in the sanitary sewage, form little magnetic floc sedimentation by mixed flocculation, floc sedimentation is adsorbed, salvages under the high-strength magnetic intensity of field, thereby finished the fast purification process of water body, effluent quality SS≤10mg/l, TP≤0.5mg/l, oil≤5mg/l, COD≤150mg/l.
Remove successively colloidalmaterial and dissolved matter through re-using biology, ecological method after the pre-treatment.Drop oxygenation and contact oxidation pool technology in the second-stage treatment, utilize miniature sewage pump residue lift, one time lifting sewage is converted into kinetic energy with potential energy, classification is fallen, form the oxygenation of water curtain and water droplet nature, need not aerating apparatus, reducing the organic while, remove the pollutents such as nitrogen, phosphorus, can decrease biological sewage treatment energy consumption.There is the village of physical features can utilize the physiographic relief drop to drop, need not water pump lifting.Water is introduced artificial swamp after purifying, and further advanced treatment is removed nitrogen phosphorus, and water outlet can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) requirement of primary standard.By the waterplant of the economic class of plantation, can produce good economic benefit in the artificial swamp.
The pretreatment stage the key technical indexes:
1. the particle diameter minimum that catches particulate reaches 2 μ m;
2. in the situation of import water quality SS:300～400mg/l, outlet water quality SS≤10mg/l.
3. in the situation of import TP2～5mg/l, water outlet TP is less than 0.05～0.5mg/l.
4. in the situation of import water quality oil≤50mg/l, outlet oil≤5mg/l.
5.COD clearance＞50%.
Magnetic separation system is the core cell of pretreatment stage, and its know-why is to give magnetic with not magnetic suspended substance in the common water body, then carries out solid-liquid separation by magnetic separating apparatus, and water body is purified; The body refuse of separating in the water body disperses, realizes after taking off magnetic separating of magnetic kind and body refuse through magnetic kind recovery system, and the magnetic kind enters the next one and recycles process.
The system device that magnetic separates the water body purification techniques is comprised of four major parts: medicine machine, coagulation system, magnetic separating apparatus and magnetic separate magnetic drum and form.
Embodiment 1
Processing object is the Typical Rural sanitary sewage, COD 400mg/L, BOD
5160mg/L, TP 5mg/L, SS 220mg/L.Fs sewage mainly is to remove the solid pollutant (SS) that is suspended state in the sewage, through the sewage BOD after this stage processing through grid, equalizing tank
5Remove about 30%; Then sewage overflow enters magnetic separation system, and its magnetic separator is disk, through water outlet COD 140～150mg/L behind 3 minutes the hydraulic detention time, SS 8～10mg/L, TP 0.1～0.5mg/L.The purpose of subordinate phase be significantly remove be colloid and dissolved state in the sewage the Organic pollutent (with COD and BOD
5Be main), this biological treatment unit is the drop oxygenation and contact oxidation pond, utilize miniature sewage pump residue lift, one time lifting sewage is converted into kinetic energy with potential energy, classification is fallen, and forms the oxygenation of water curtain and water droplet nature, need not aerating apparatus, reducing the organic pollutents such as nitrogen, phosphorus of removing simultaneously, can decrease biological sewage treatment energy consumption.By the processing in this stage, the pollutent index can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) requirement of primary standard.The phase III artificial swamp mainly is further to remove subordinate phase to process and to fail the pollution substance effectively removed, the solubility inorganics that the organism of failing to degrade comprising microorganism and nitrogen, phosphorus etc. can cause body eutrophication etc.Through COD 50～60mg/L in the outer draining of tertiary treatment, BOD
515～20mg/L, SS 8～10mg/L, TN 10～12mg/L, NH
3-N 3～6mg/L, TP 0.1～0.5mg/L.
Embodiment 2
Processing object is the Representative Town sanitary sewage, COD 300mg/L, BOD
5125mg/L, TP 4mg/L, SS 180mg/L.Fs sewage mainly is to remove the solid pollutant (SS) that is suspended state in the sewage, through the sewage BOD after this stage processing through grid, equalizing tank
5Remove about 30%; Then sewage overflow enters magnetic separation system, and its magnetic separator is disk, through water outlet COD 120～150mg/L behind 3.5 minutes the hydraulic detention time, SS 8～10mg/L, TP0.1～0.5mg/L.The purpose of subordinate phase be significantly remove be colloid and dissolved state in the sewage the Organic pollutent (with COD and BOD
5Be main), this Ecological Disposal unit is artificial swamp, the insoluble organism of sewage is by precipitation, the filteration of wetland, can be trapped very soon, and then utilized by microorganism, dissolved organic matter then can be decomposed, remove by the biomembranous absorption of root system of plant, absorption and biological metabolism degradation process in the sewage, is reducing the organic while, removes the pollutents such as nitrogen, phosphorus.By the processing in this stage, the pollutent index can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) requirement of primary standard: COD 50～60mg/L, BOD
515～20mg/L, SS 8～～10mg/L, TN 15～20mg/L, NH
3-N 5～8mg/L, TP 0.1～0.5mg/L.
Claims (6)
1. Small Towns dispersant type domestic wastewater treatment process is characterized in that: sanitary sewage successively through grid, equalizing tank, magnetic separate, water outlet behind the artificial swamp.
2. a kind of Small Towns dispersant type domestic wastewater treatment process as claimed in claim 1 is characterized in that: also comprise in this technique after magnetic separates entering the drop oxygenation and contact oxidation pond again.
3. a kind of Small Towns dispersant type domestic wastewater treatment process as claimed in claim 1 or 2, it is characterized in that: the magnetic separator in the magnetically separating and purifying technology can be magnetic disk separator, magnetic bar separator or high gradient magnetic separator.
4. a kind of Small Towns dispersant type domestic wastewater treatment process as claimed in claim 3 is characterized in that: the effluent quality SS≤10mg/l after separating through magnetic, TP≤0.5mg/l, oil≤5mg/l, COD≤150mg/l.
5. a kind of Small Towns dispersant type domestic wastewater treatment process as claimed in claim 3, it is characterized in that: the magnetic separator in the magnetic separation technique is magnetic disk separator.
6. a kind of Small Towns dispersant type domestic wastewater treatment process as claimed in claim 5, it is characterized in that: the reaction times that sanitary sewage enters magnetic disk separator is 3-5 minute.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102852021A CN103011490A (en) | 2011-09-23 | 2011-09-23 | Technology for distributed treatment on domestic sewage from small rural towns |
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| CN2011102852021A CN103011490A (en) | 2011-09-23 | 2011-09-23 | Technology for distributed treatment on domestic sewage from small rural towns |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310708A (en) * | 2014-10-22 | 2015-01-28 | 河南恒安环保科技有限公司 | Application method of drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment |
| CN104529045A (en) * | 2015-01-11 | 2015-04-22 | 李宇花 | Decentralized sewage treatment method in rural township |
| CN105130123A (en) * | 2015-09-06 | 2015-12-09 | 总装备部工程设计研究总院 | Northern residential district sewage processing system and method |
| CN105236664A (en) * | 2015-10-13 | 2016-01-13 | 桂林市春晓环保科技有限公司 | Domestic sewage purification method |
| CN106277544A (en) * | 2016-09-26 | 2017-01-04 | 四川环能德美科技股份有限公司 | A kind of purification process technique of polluted surface water body |
| WO2019079947A1 (en) * | 2017-10-23 | 2019-05-02 | 盐城衍易科技有限公司 | Integrated sewage treatment device |
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| CN101863584A (en) * | 2010-04-29 | 2010-10-20 | 重庆大学 | Biological contact oxidation and artificial wetland combined treatment system for grey water of residential area |
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| CN1666962A (en) * | 2004-03-09 | 2005-09-14 | 蔡瑾 | Method for treating domestic sewage by employing high strong-magnetic separation technology |
| CN101863585A (en) * | 2010-04-29 | 2010-10-20 | 重庆大学 | Physicochemical treatment and artificial wetland combined treatment system for sewage treatment of residential area |
| CN101863584A (en) * | 2010-04-29 | 2010-10-20 | 重庆大学 | Biological contact oxidation and artificial wetland combined treatment system for grey water of residential area |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104310708A (en) * | 2014-10-22 | 2015-01-28 | 河南恒安环保科技有限公司 | Application method of drop aeration-high depth composite undercurrent constructed wetland technology in rural domestic sewage treatment |
| CN104310708B (en) * | 2014-10-22 | 2015-11-11 | 河南恒安环保科技有限公司 | The application method of drop oxygenation-high depth composite under-current artificial wetland technology in rural domestic sewage treatment |
| CN104529045A (en) * | 2015-01-11 | 2015-04-22 | 李宇花 | Decentralized sewage treatment method in rural township |
| CN104529045B (en) * | 2015-01-11 | 2015-10-28 | 北京嘉源汇川水务投资管理有限公司 | A kind of villages and towns in rural areas decentralized sewage treatment method |
| CN105130123A (en) * | 2015-09-06 | 2015-12-09 | 总装备部工程设计研究总院 | Northern residential district sewage processing system and method |
| CN105236664A (en) * | 2015-10-13 | 2016-01-13 | 桂林市春晓环保科技有限公司 | Domestic sewage purification method |
| CN106277544A (en) * | 2016-09-26 | 2017-01-04 | 四川环能德美科技股份有限公司 | A kind of purification process technique of polluted surface water body |
| WO2019079947A1 (en) * | 2017-10-23 | 2019-05-02 | 盐城衍易科技有限公司 | Integrated sewage treatment device |
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Application publication date: 20130403 |