CN101948214B - Ecological greenbelt treatment process and system for treating rural domestic sewage - Google Patents
Ecological greenbelt treatment process and system for treating rural domestic sewage Download PDFInfo
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention relates to an ecological greenbelt treatment process for treating rural domestic sewage, which mainly comprises the steps of: (1) anaerobic pretreatment: performing anaerobic hydrolysis pretreatment to domestic sewage; (2) artificial wetland treatment: performing artificial wetland treatment to pretreated domestic sewage; and (3) shallow ecological pond aerobic biotreatment: further performing shallow ecological pond aerobic biotreatment to outlet water treated by the artificial wetland, degrading and converting organic matters and nutrients entering the pond, and recycling purified sewage as a regenerated water resource. The invention adopts an ecological greenbelt treatment system comprising the anaerobic pretreatment, the artificial wetland and the shallow ecological pond to treat the rural domestic sewage, and has the characteristics of good treatment effect, recycling on site, low investment, low system operating cost, simple maintenance, obvious ecological benefit and the like.
Description
Technical field
The present invention relates to a kind of domestic sewage in rural areas by using treatment process and system, improvement technology and system thereof that particularly a kind of artificial swamp that is used for domestic sewage in rural areas by using improvement combines with the shallow-layer ecological pond belong to environment protection water pollution control field.
Background technology
Along with the development of China's industrial and agricultural production, Increase of population, problem of environmental pollution is serious day by day.At present most of sanitary sewages in China rural area directly discharge without any sewage collecting and processing, cause pool, stream pollution, not only influence villager's living environment, and the serious threat peasant's are healthy.The common problem that the rural area exists is: population decentralization, and quantity is more, the infrastructure construction weakness, imperfection is built in water exhaust system and sewage disposal.Require to improve the attention that reaches self health along with the change of agriculture mode of life, to living environment, strengthen the Rural areas sewage discharge and collect and handle building-up work, in time strengthen infrastructure in the new countryside construction, advance an important content of villages and small towns building-up work, simultaneously also be to be solvedly in current rural people's habitat environment improvement work be badly in need of most, the most urgent, distinct issues, have important practical significance.
The principal feature of domestic sewage in rural areas by using is: to wash rice, to wash dish, shower and wash lavatory waste water; Contain higher people's domestic animals manure composition, nitrogen, phosphorus content particularly phosphorus content are higher; Water conditioning but muddiness, color depth is cut has stench, is slight alkalinity; Generally do not contain Toxic matter, contain a large amount of bacteriums, virus and parasitic ovum.The most fiscal revenue in China Rural areas are not rich, and per capita income is not high, and state of the art is backward relatively, and the sewage treatment process that is fit to the processing domestic sewage in rural areas by using also is not very few.Seeking a kind of simply effective, cheap sewage treatment process is to comply with the era development that domestic sewage in rural areas by using is handled, and artificial swamp waste water control technology satisfies this requirement.
Artificial marsh sewage treatment system is artificial monitoring, certain length and width when on the depression of ground inclination by composite bed of packings such as soil, sand, stone and on the bed body plantation have that handling property is good, surviving rate is high, water resisting property is strong, vegetative period is long, attractive in appearance and plant economically valuable reaches in water, the animal, the Institute of Micro-biology that survive in the filler form unique ecotope, effluent stream is when bed surface and bed body filler slit, by the efficient purification of realizations such as filtration, absorption, precipitation, ion-exchange, plant absorbing and microbiological degradation to sewage.
Flow pattern according to sewage can be divided into artificial marsh sewage treatment system surface current artificial wetland, horizontal drowned flow artificial wet land and three kinds of main types of vertical current constructed wetland.Dissimilar artificial swamps are to the removal effect difference of pollutent, and relative merits are separately arranged.
(1) surface current artificial wetland: such artificial swamp and natural wetland are similar, sewage flows on the top layer of artificial swamp, water level is more shallow, generally at 0.1-0.6m, its removal to pollutent mainly relies on the interception function that is positioned at the following plant roots and stems of the water surface and the biomembranous Degradation on the rhizome.But this wetland can not make full use of the effect of filler and root system of plant, removes the limited in one's ability of pollutent, is subjected to seasonal effect bigger, and winter, the water surface can freeze, and easily produce peculiar smell summer, and mosquitos and flies grows; Exist floor space big simultaneously, shortcoming such as hydraulic loading rate is little, but this wetland cost is low, and simple to operate, working cost is low.
(2) horizontal drowned flow artificial wet land: such artificial swamp is crossed bed of packings because of sewage from an end horizontal flow and is gained the name.It is made up of one or more bed of packings, bed body filling substrate, and the bed end infiltration layer of setting up defences prevents the polluted underground water body.In horizontal drowned flow type artificial swamp, sewage is in wetland bed internal flow, can give full play to the effect of matrix and root system of plant on the one hand, on the other hand, and phenomenon such as foul smelling and the living mosquitos and flies of evil seldom.But this wetland easily forms the dead angle in bed, causes short stream, influences treatment effect.
(3) vertical current constructed wetland.In vertical current constructed wetland, sewage flows to the bottom of bed of packings from the wetland surface longitudinal, and a bed body is in undersaturated condition, and oxygen can be secreted oxygen by atmospheric diffusion and root system of plant and enter wet land system, and its nitrated ability is stronger, can handle the higher waste water of ammonia nitrogen.But vertical current constructed wetland is lower to organic removal ability.
Summary of the invention
But technical problem to be solved by this invention provides a kind of treatment effect good original place reuse, systematic running cost is low, maintenance is simple, ecological benefits are handled domestic sewage in rural areas by using significantly ecological green land treatment process and system.
A kind of ecological green land treatment process of handling domestic sewage in rural areas by using, mainly by the anaerobism pre-treatment step, artificial swamp treatment step and shallow-layer ecological pond aerobe treatment step are formed: (1) sanitary sewage elder generation flows through by waste pipe behind the septic tank, collect by pipe network, gravity flow enters grille well interception macrobead suspended substance, gravity flow enters equalizing tank again, equalizing tank sewage carries out the anaerobic hydrolysis pre-treatment after pump promotes, with carbohydrate degradation is lipid acid, solid matter is degraded to dissolved matter, larger molecular organics is resolved into small organic molecule, and the effect by anerobe or amphimicrobe under the anaerobic condition is resolved into CH with the organism in sewage or the mud
4And CO
2, make organism obtain degraded, mud obtains precipitation, and the artificial swamp processing of next step is carried out in reacted water outlet, and mud is regularly transported outward processing; (2) pretreated sewage being carried out artificial swamp handles, utilize plant, absorption of microorganism and Degradation, with particulate matter, small organic molecule matter is converted into carbonic acid gas and water inorganic substance, specifically be to be evenly distributed in the packing layer earlier via the anaerobism pretreated sewage, by root system of plant flourishing in the overburden layer of packing layer upper strata, microflora is to the organic substance in the sewage, nitrogen, phosphorus absorbs degraded, plant is through the rich nutritive material in the photosynthesis absorption sewage, plant also constantly utilizes sun power to carry out photosynthesis simultaneously, and the required oxygen source of oxidizing reaction of microorganism is provided; Effluent stream is carried out oxygenation and is carried out aerobic reaction with the microorganism that adheres to when the coarse sands layer of packing layer lower floor and pebbles layer in the packing layer space, filter, hold back, further improve processing power and treatment effect; Subsequently sewage further through sandstone filter, hold back, microorganism and plant absorbing reaction remove organism and nutritive substance, discharge the shallow-layer ecological pond that carries out next step by rising pipe and handle; (3) shallow-layer ecological pond aerobe further being carried out in the water outlet of handling through artificial swamp handles, in the shallow-layer ecological pond, plant aquatic crops, carry out the breed of aquatic products and aquatic bird and form artificial ecosystem, transmission step by step, the conversion of material migration, conversion and energy by many food chains in the shallow-layer ecological pond, degrade and transform entering organism in the pool and nutrition, the sewage after the purification is recycled as regenerated water source; The ecological green land treatment system of the ecological green land treatment process of described processing domestic sewage in rural areas by using comprises grille well, equalizing tank, anaerobism pretreatment pool, artificial swamp processing unit and the shallow-layer ecological pond that connects successively by pipeline; Be provided with anaerobic membrane bioreactor in the described pressure oxygen pretreatment pool, comprise three-dimensional soft-filler in the anaerobic membrane bioreactor, be attached with the microbial film that constitutes by the microorganism cenobium on the filler; Be provided with the several layers solid packing in the described artificial swamp processing unit, the solid packing topmost is the soil microorganisms layer, plants above and is implanted with green plants, and green plants is aquatic Canna generalis Bailey, little tea plum, cuckoo, careless Pu, glossy privet, iris, the tuber of dwarf lilyturf or Festuca Arundinacea; The described shallow-layer ecological pond degree of depth is 1.2m, wherein plants and is implanted with waterplant, cultures aquatic products and aquatic bird, and waterplant is that water lily, lotus, Amazon Wang Lian or duckweed meet grass; Wherein said artificial swamp processing unit is divided into the one-level treatment zone and the second-stage treatment district is total to the bi-level treatment district, the centre is separated by with water [proof, filler is respectively the 150-250mm coarse sands layer from top to bottom in the one-level treatment zone, the plastic plate filtering layer, 450-550mm pebbles layer, 250-350mm pebbles layer, the plain concrete of 100mm, waterproof layer, the plain concrete bed course of 100mm, 300mm piece stone bed course, be provided with water inlet pipe between plastic plate filtering layer and the 450-550mm pebbles layer, water inlet pipe is provided with down water shoot for the perforation water distributor between 450-550mm pebbles layer and the 250-350mm pebbles layer; Filler is respectively 250-350mm fine sand layer, 150-250mm coarse sands layer, plastic plate filtering layer, 200mm green stone, 250-350mm pebbles floor, the plain concrete of 100mm, waterproof layer, the plain concrete bed course of 100mm, 300mm piece stone bed course from top to bottom in the described second-stage treatment district, be provided with water shoot between 250-350mm fine sand layer and the 150-250mm coarse sands layer, be provided with down water shoot between 200mm green stone and the 250-350mm pebbles layer; In the described artificial swamp processing unit, the soil microorganisms layer is controlled at 1600mm to the total height of waterproof layer.
Technical process of the present invention is: domestic sewage in rural areas by using enters the resident living waste pipe behind septic tank, collect by pipe network, gravity flow enters grille well, be provided with grid in the well, interception macrobead suspended substance, gravity flow enters equalizing tank again, and equalizing tank sewage is promoted to the anaerobism pretreatment pool through pump, by the effect of anerobe or double oxygen bacterium the organism in sewage or the mud is resolved into CH under the anaerobic condition
4And CO
2, make organism obtain degraded, mud is stablized.The microbial film of taking off from filling surface separates pretreatment system, and excess sludge is regularly transported outward processing.The water outlet of anaerobism pretreatment system is promoted by lift pump and enters the artificial swamp water distribution system, sewage is evenly distributed in the biologic packing material layer of artificial swamp, under the sorption of the decomposition of microorganism and plant, pollutants in sewage is degraded, and then flow into certainly in the shallow-layer ecological pond, in the pool, further finish the removal to ammonia nitrogen, phosphorus and organic substance such as microorganism, hydrobiont, algae, aquatic bird, in the pool, form an intact ecocystem simultaneously, form systemic circulation.Water after the purification is qualified discharge directly, also can be back to the pouring greening.Wherein the anaerobism pretreatment pool mud that adopts membrane biological reactor process to produce is less, and 3 months or suction half a year once get final product.
The present invention has following advantage: (1) is adopted anaerobism pre-treatment, artificial swamp, ecological green land treatment system of shallow-layer ecological pond composition to carry out domestic sewage in rural areas by using and is handled, but has characteristics such as treatment effect good original place reuse, investment is low, systematic running cost is low, maintenance is simple, ecological benefits are remarkable; (2) adopt perforation water distributor multiple spot water distribution, compare with undercurrent with traditional surface current, it is evenly distributed, and does not have dead band and short district, has increased substantially the utilising efficiency of artificial swamp.The processing unit floor space is less, and it only is 2-6m that ton water takes up an area of
2(3) ecological green land treatment system of the present invention can form landscape green space when finishing sewage disposal, and the plant that is elected to be can form the garden landscape effect, strengthens height spatial level sense straggly, and garden landscape is fully combined with ecoscape; (4) designed artificial wetland of the present invention makes total system form anaerobic environment, the double oxygen environment at middle part and the aerobic environment on top of bottom.The degraded of this anaerobism and aerobic condition coexistence promotion pollutent has improved the clearance of system to nitrogen, phosphorus; (5) adopt anaerobic membrane bioreactor, have energy consumption low, be easy to management, to produce sludge quantity few, reduces outward transport sludge treatment number of times, saves cost and labor force.
Description of drawings
Fig. 1 is the structural representation of anaerobism pretreatment pool of the present invention;
Fig. 2 is an artificial swamp structural representation of the present invention;
Fig. 3 is an artificial swamp floor map of the present invention;
Fig. 4 is a shallow-layer ecological pond floor map of the present invention;
Fig. 5 is a process flow diagram of the present invention;
Among Fig. 1,11-sewage draining exit, 12-venting hole, 13-concrete basin, 14-filler.
Among Fig. 2, water shoot, 26-pebbles layer, 27-water inlet pipe, 28-filtering layer, 29-coarse sands layer, 210-water [proof, 211-green stone, 212-fine sand layer, 213-rising pipe, 214-overburden layer, the brick revetment of 215-, 216-green plants, 217-railing under plain concrete bed course of 22-C10 and piece stone bed course, 23-waterproof layer, the plain concrete layer of 24-C20, the 25-.
Among Fig. 3, the aquatic Canna generalis Bailey of 31-, the little tea plum of 32-, 33-cuckoo, 34-tortoise plastron Chinese ilex, 35-grass Pu, the 36-safflower wood that continues.
Among Fig. 4,41-railing, 42-bank protection, 43-water lily, 44-lotus, 45-Amazon Wang Lian, 46-duckweed meet grass, 47-stone ladder.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples, but protection scope of the present invention is not limited to this.
A kind of ecological green land treatment process of handling domestic sewage in rural areas by using, this treatment process mainly is made up of anaerobism pre-treatment step, artificial swamp treatment step and shallow-layer ecological pond aerobe treatment step: (1) domestic sewage in rural areas by using is behind septic tank, enter grille well, remove big suspended particle, enter in the equalizing tank again, regulating pondage, homogenizing water quality.(2) water outlet behind equalizing tank enters the anaerobism pretreatment system after pump promotes, carry out the anaerobic membrane bioreactor biochemical treatment.(3) water outlet behind the anaerobism pretreatment system enters artificial wet land treating system after pump promotes, carry out anaerobism, double oxygen, the aerobic biochemical treatment that combines.(4) water outlet behind artificial wet land treating system enters and carries out the aerobe processing in the shallow-layer ecological pond, forms a complete ecological treatment system, finishes the recycling and the reuse of waste water.
A kind of ecological green land treatment system of handling domestic sewage in rural areas by using, described ecological green land treatment system comprise grille well, equalizing tank, anaerobism pretreatment pool, artificial swamp processing unit and the shallow-layer ecological pond that connects successively by pipeline; Be provided with anaerobic membrane bioreactor in the described pressure oxygen pretreatment pool; Be provided with the several layers solid packing in the described artificial swamp processing unit, the solid packing topmost is a soil microorganisms layer 214, plants above and is implanted with green plants 216; Plant in the described shallow-layer ecological pond and be implanted with waterplant, culture aquatic products and aquatic bird.
As shown in Figure 1, anaerobism pretreatment pool of the present invention adopts concrete basin 13, in be provided with in sewage draining exit 11 and venting hole 12, the centre is equipped with three-dimensional soft-filler 14, is attached with the microbial film that is made of the microorganism cenobium on the filler 14.When effluent stream through in this, combined reactions such as the organic substance generation physics in microorganism and the sewage, chemistry, biological chemistry integrate absorption, biofloculation, biological degradation.By a series of combined reactions, can be lipid acid with carbohydrate degradation, solid matter is degraded to dissolved matter, and larger molecular organics is resolved into small organic molecule, is convenient to aerobic reaction and plant absorbing; By the gravitational energy effect, make the mud in the water obtain precipitation.Reacted water outlet enters the artificial swamp processing unit via lift pump.
As shown in Figure 2, described artificial swamp processing unit is the underground type structure, and with the brick revetment 215 that forms, revetment 215 is provided with railing 217 on every side, and waterproof cloth 23 is laid around reaching in the bottom at the bottom of the whole pond, and the bottom is piece stone and plain concrete bed course 22.The artificial swamp processing unit is divided into the one-level treatment zone and the second-stage treatment district is total to the bi-level treatment district, the centre is separated by with water [proof 210, filler is respectively 150-250mm coarse sands layer 29, plastic plate filtering layer 28,450-550mm pebbles layer and 250-350mm pebbles layer 26, the plain concrete 24 of 100mm, waterproof layer 23, the plain concrete bed course of 100mm and 300mm piece stone bed course 22 from top to bottom in the one-level treatment zone, be provided with water inlet pipe 27 between plastic plate filtering layer and the 450-550mm pebbles layer, be provided with down water shoot 25 between 450-550mm pebbles layer and the 250-350mm pebbles layer; Filler is respectively 250-350mm fine sand layer 212,150-250mm coarse sands layer 29, plastic plate filtering layer 28,200mm green stone 211,250-350mm pebbles floor 26, the plain concrete 24 of 100mm, waterproof layer 23, the plain concrete bed course of 100mm and 300mm piece stone bed course 22 from top to bottom in the described second-stage treatment district, be provided with water shoot 213 between 250-350mm fine sand layer 212 and the 150-250mm coarse sands layer 29, be provided with down water shoot 25 between 200mm green stone and the 250-350mm pebbles layer.
Sewage via the anaerobism pretreatment system is evenly distributed to the packing layer of one-level treatment zone from water inlet pipe 27, by root system of plant, microflora flourishing in the upper strata overburden layer 214 organic substance in the sewage, nitrogen, phosphorus etc. are absorbed degraded, plant is through the rich nutritive material in the photosynthesis absorption sewage, plant also constantly utilizes sun power to carry out photosynthesis simultaneously, and the required oxygen source of oxidizing reaction of microorganism is provided.Effluent stream is carried out oxygenation and is carried out aerobic reaction with the microorganism that adheres to when packing layer-coarse sands layer 29, pebbles layer 26 in the packing layer space, filter, hold back, further improve processing power and treatment effect.Sewage is collected by following water shoot 25 subsequently, enters into the packing layer in second-stage treatment district, water (flow) direction from the bottom to top, further through sandstone filters, hold back, reactions such as microorganism and plant absorbing remove organism and nutritive substance, by rising pipe 213 discharges.
As shown in Figure 3, be the orthographic plan of the described artificial swamp processing unit of Fig. 2, the plant of top plantation mainly contains aquatic Canna generalis Bailey 31, little tea plum 32, cuckoo 33, tortoise plastron Chinese ilex 34, careless Pu 35, the safflower wood 36 etc. that continues.The discharging modes of plantation are satisfying under the prerequisite of processing requirements based on aesthstic view, and are pleasing.
In the water outlet inflow shallow-layer ecological pond as shown in Figure 4 via artificial swamp, be provided with railing 41, bank protection 42 and stone ladder 47 in the shallow-layer ecological pond.Planting aquatic plants water lily 43, lotus 44, Amazon Wang Lian 45, duckweed meet grass 46 in the pool, also can culture aquatic products and aquatic bird according to villager's needs, are the initial energy with sunlight, form the small-sized ecosystem in the pool.Under the promotion of sun power, transmission step by step, the conversion of material migration, conversion and energy by many food chains in the shallow-layer ecological pond are degraded and are transformed entering organism in the pool and nutrition.The sewage that purifies is also recycled as regenerated water source.
As shown in Figure 5, domestic sewage in rural areas by using flows into qualified discharge behind grille well, equalizing tank, anaerobism pretreatment pool, artificial swamp processing unit, the shallow-layer ecological pond after via septic tank successively, and " integrated wastewater discharge standard " primary standard in (GB8978-1996) is satisfied in water outlet.Wherein the excess sludge that produces in the anaerobism pretreatment system is transported outward processing; Water outlet in equalizing tank and the anaerobism pretreatment pool promotes by pump and enters next processing unit, and other processing units enter for gravity flow.
The effect example
Adopt above-mentioned process system to handle domestic sewage in rural areas by using, influent quality and effluent quality are as follows:
Table 1 influent quality index (concentration unit: mg/L)
| Water quality parameter | CODcr | BOD 5 | SS | NH 3-N |
| Concentration | ≤400 | ≤250 | ≤200 | ≤35 |
Table 2 effluent quality index (concentration unit: mg/L)
| Water quality parameter | pH | CODcr | BOD 5 | SS | Phosphoric acid salt | NH 3-N |
| Concentration | 6-9 | ≤100 | ≤20 | ≤70 | ≤0.5 | ≤15 |
Claims (2)
1. ecological green land treatment process of handling domestic sewage in rural areas by using, mainly by the anaerobism pre-treatment step, artificial swamp treatment step and shallow-layer ecological pond aerobe treatment step are formed: (1) sanitary sewage elder generation flows through by waste pipe behind the septic tank, collect by pipe network, gravity flow enters grille well interception macrobead suspended substance, gravity flow enters equalizing tank again, equalizing tank sewage carries out the anaerobic hydrolysis pre-treatment after pump promotes, with carbohydrate degradation is lipid acid, solid matter is degraded to dissolved matter, larger molecular organics is resolved into small organic molecule, and the effect by anerobe or amphimicrobe under the anaerobic condition is resolved into CH with the organism in sewage or the mud
4And CO
2, make organism obtain degraded, mud obtains precipitation, and the artificial swamp processing of next step is carried out in reacted water outlet, and mud is regularly transported outward processing; (2) pretreated sewage being carried out artificial swamp handles, utilize plant, absorption of microorganism and Degradation, with particulate matter, small organic molecule matter is converted into carbonic acid gas and water, specifically be to be evenly distributed in the packing layer earlier via the anaerobism pretreated sewage, by root system of plant flourishing in the overburden layer of packing layer upper strata, microflora is to the organic substance in the sewage, nitrogen, phosphorus absorbs degraded, plant is through the rich nutritive material in the photosynthesis absorption sewage, plant also constantly utilizes sun power to carry out photosynthesis simultaneously, and the required oxygen source of oxidizing reaction of microorganism is provided; Effluent stream is carried out oxygenation and is carried out aerobic reaction with the microorganism that adheres to when the coarse sands layer of packing layer lower floor and pebbles layer in the packing layer space, filter, hold back, further improve processing power and treatment effect; Subsequently sewage further through sandstone filter, hold back, microorganism and plant absorbing reaction remove organism and nutritive substance, discharge the shallow-layer ecological pond that carries out next step by rising pipe and handle; (3) shallow-layer ecological pond aerobe further being carried out in the water outlet of handling through artificial swamp handles, in the shallow-layer ecological pond, plant aquatic crops, carry out the breed of aquatic products and aquatic bird and form artificial ecosystem, transmission step by step, the conversion of material migration, conversion and energy by many food chains in the shallow-layer ecological pond, degrade and transform entering organism in the pool and nutrition, the sewage after the purification is recycled as regenerated water source;
It is characterized in that: the ecological green land treatment system of the ecological green land treatment process of described processing domestic sewage in rural areas by using comprises grille well, equalizing tank, anaerobism pretreatment pool, artificial swamp processing unit and the shallow-layer ecological pond that connects successively by pipeline; Be provided with anaerobic membrane bioreactor in the described pressure oxygen pretreatment pool, comprise three-dimensional soft-filler in the anaerobic membrane bioreactor, be attached with the microbial film that constitutes by the microorganism cenobium on the filler; Be provided with the several layers solid packing in the described artificial swamp processing unit, the solid packing topmost is the soil microorganisms layer, plants above and is implanted with green plants, and green plants is aquatic Canna generalis Bailey, little tea plum, cuckoo, careless Pu, glossy privet, iris, the tuber of dwarf lilyturf or Festuca Arundinacea; The described shallow-layer ecological pond degree of depth is 1.2m, wherein plants and is implanted with waterplant, cultures aquatic products and aquatic bird, and waterplant is that water lily, lotus, Amazon Wang Lian or duckweed meet grass;
Described artificial swamp processing unit is divided into the one-level treatment zone and the second-stage treatment district is total to the bi-level treatment district, the centre is separated by with water [proof, filler is respectively 150-250mm coarse sands layer, plastic plate filtering layer, 450-550mm pebbles layer, 250-350mm pebbles layer, the plain concrete of 100mm, waterproof layer, the plain concrete bed course of 100mm, 300mm piece stone bed course from top to bottom in the one-level treatment zone, be provided with water inlet pipe between plastic plate filtering layer and the 450-550mm pebbles layer, be provided with down water shoot between 450-550mm pebbles layer and the 250-350mm pebbles layer; Filler is respectively 250-350mm fine sand layer, 150-250mm coarse sands layer, plastic plate filtering layer, 200mm green stone, 250-350mm pebbles floor, the plain concrete of 100mm, waterproof layer, the plain concrete bed course of 100mm, 300mm piece stone bed course from top to bottom in the described second-stage treatment district, be provided with water shoot between 250-350mm fine sand layer and the 150-250mm coarse sands layer, be provided with down water shoot between 200mm green stone and the 250-350mm pebbles layer.
2. handle the ecological green land treatment process of domestic sewage in rural areas by using according to claim 1, it is characterized in that: in the described artificial swamp processing unit, water inlet pipe is the perforation water distributor, and the soil microorganisms layer is controlled at 1600mm to the total height of waterproof layer.
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