Summary of the invention
The purpose of this utility model provides a kind of plant bed formula sewage recycling treatment system, can fast, effectively, stably remove the oxious component in the sewage, and realizes recycling.
For this reason, the following technical scheme of the new employing of this practicality: plant bed formula sewage recycling treatment system, it is characterized in that: have the plant bed formula tectosome that is enclosed to form by impermeable wall, in described plant bed formula tectosome, be disposed with fill stratum, water conservation layer, mixed filler layer and water-resisting layer from top to bottom, between described water conservation layer and described mixed filler layer, be laid with filtration irrigation device from sewage to described plant bed formula tectosome that carry and distribute, on described fill stratum, plant and be implanted with plant.
Described impermeable wall can adopt cultivates material of construction and builds by laying bricks or stones.Material of construction should select for use stablize, corrosion-resistant, material that mechanical property is good.
Described plant bed can be the bed of growing seedlings that is used to cultivate nursery stock.
Described fill stratum is made up of silty loam layer and sandy soil mixolimnion.
Described water conservation layer adopts the various materials that absorb and keep the moisture content ability that have.Preferably, comprise natural fiber, synthon or natural or synthetic fabrics or the non-woven fabrics that has high absorption and keep the moisture content ability.For example, a kind of fabric or non-woven fabrics that comprises the natural or synthon that are coated with high-absorbent material.
Described filtration irrigation device comprises the infiltrating irrigation pipe network that is made of the infiltrating irrigation pipe that is interconnected, and the infiltrating irrigation pipe network is connected with sewage input tube and sewage output tube, and sewage input tube, sewage output tube are respectively arranged with valve.
Described infiltrating irrigation pipe comprises that outer wall has to offer the hollow tube that is provided with posticum in groove, the groove on boss, the boss, and is movably placed in the block in the groove, and is formed with the infiltration gap between block and the groove.
Described sewage output tube has overflow ducts, so as to carry out sewage disposal detect and discharge plant bed in excessive water.
Described mixed filler layer comprises cobble, rough sand, brown coal, coke mixture.
Described water-resisting layer adopts anti seepage membrane.Preferably, adopt the protection against corrosion of making, nontoxic anti seepage membrane, to reduce to environmental influence by macromolecular material.
Compare with existing artificial marsh sewage treatment system, the plant bed formula sewage recycling treatment system that the utility model provides has following outstanding advantage:
(1) adopt the filtration irrigation device bury underground to carry and distribute sewage, can make sewage be distributed in fast, equably plant bed in, can shorten the treatment time greatly, improve treatment effect.Owing to adopt the mode of infiltrating irrigation, can stop effectively mud, suspended substance in the sewage enter plant bed in, thereby guaranteed processing efficiency steady in a long-term.
(2) a plurality of function treatment district of formation stereoscopic configurations in plant bed, can dissolve by soil, microbiological degradation, a plurality of approach such as plant absorbing, the objectionable impuritiess such as organic and inorganic compound of the heavy metal ion in the sewage, not complete oxidation and degraded are digested quickly and efficiently and decompose, make the water quality of discharge water all reach national agricultural irrigation water quality standard.Simultaneously the eutrophy composition in the sewage is decomposed, changing into fertilizer is the plant absorbing utilization.
Specifically, form the anaerobion district, play being adsorbed with pest, produce soil ulmin, decompose eutrophy composition in the sewage, improve the effect of saline and alkaline water quality at mixed filler layer; The water conservation layer plays maintenance and transmits water, fertilizer, action of microorganisms, and can hold back a part of rain, snow-broth for plant absorbing, for plant provides better growing conditions, forms the aerobic-anaerobic microbe district in this zone simultaneously; Fill stratum is the aerobic microbiological district; Plant is used by the nutritive substance that root system absorbs in the sewage, and the heavy metal in absorption and the enrichment sewage and some hazardous and noxious substances, by photosynthesis and translocation, oxygen is transported to root simultaneously, forms the aerobic microbiological district on every side in the root district.
(3) be suitable for planting the high plant of various xerophytes, particularly economic worth in plant bed, can produce good economic benefits.
The detailed construction and the function of the plant bed formula sewage recycling treatment system that the utility model provides, and other beneficial effect are illustrated in more detail by following embodiment.
Embodiment
The utility model provides a kind of plant bed formula sewage recycling treatment system.
The structure of i. plant bed formula sewage recycling treatment system
With reference to Fig. 1, comprise that the body of wall 1 by height 0.70~0.95m encloses the plant bed formula tectosome of the contour tetragon that forms.The area of plant bed formula tectosome is at 1000~900000m
2, long-width ratio was less than 5: 1, and inner formation can be held 400m
3~360000m
3The volume of sewage, sewage treatment capacity was handled and sewage effluent 100m in 48 hours
3~50000m
3Design.
Body of wall 1 is built by laying bricks or stones with material of construction and to be formed and to do corresponding antiseep and handle.Material of construction should select for use stablize, corrosion-resistant, material that mechanical property is good, as materials for walls such as concrete precast element, bricks.Preferably adopt cement hollow building blocks, for example the applicant's " high strength holllow building block " power of having patented, notification number CN2613534.This holllow building block is a kind of light building material, has stronger load-bearing, shock resistance, anti-shear ability.
Water-resisting layer 2 is laid on plant bed formula tectosome inner bottom part, is used to stop sewage to underground leakage.Water-resisting layer 2 is made of polyvinyl chloride or the polypropylene anti seepage membrane of thickness 0.06~1.0mm, has long characteristics of protection against corrosion, nontoxic, stationary phase.
Mixed filler layer 3 is laid on above the water-resisting layer 2.Mixed filler layer 3 is made up of the material of following volume percent: cobble 50%, coarse sand 30%, brown coal 15%, coke 5%.The thickness of mixed filler layer 3 is 0.15~0.28m.
Filtration irrigation device comprises the infiltrating irrigation pipe network that is made of the infiltrating irrigation pipe 4 that is interconnected, its level be installed in mixed filler layer 3 above.The infiltrating irrigation pipe network is connected with and extends to plant bed outer sewage input tube 8 and sewage output tube 9, and sewage input tube 8, sewage output tube 9 are respectively arranged with input valve 10, output valve 11.Be formed with overflow ducts 12 in the sewage output tube 11.
Infiltrating irrigation pipe 4 can adopt the applicant's a kind of plumbing installation power of having patented, Granted publication CN1253974.With reference to Fig. 2, infiltrating irrigation pipe 4 comprises a hollow tube 401, and tube wall has boss 402, offer groove 403 on the boss 402, be provided with posticum 404 in the groove 403, in groove 403, be provided with active block stop 405, be formed with infiltration gap 406 between block 405 and the groove 402.About the more detailed description of infiltrating irrigation pipe 4, can be with reference to the patent specification of Granted publication CN1253974.
Water conservation layer 5 covers one deck rough sand layer or sandy soil layer earlier on the infiltrating irrigation pipe network, cover to go up water-keeping material formation water conservation layer 5 again.Water-keeping material can be selected according to practical situation, as in western arid or saltings, selects the 40g/m of coating polyethylene alcohol or other high-absorbent materials
2~300g/m
2Non-woven fabrics, and in, the eastern region, can select the fibrous thickness of crude palm palmitic acid is the monkey grass layer of 2~30mm, to bring into play function separately.
Fill stratum 6, be laid on water conservation layer 5 above.The top layer was formed under fill stratum 6 was mixed by silty loam upper epidermis and sandy soil, and thickness is 0.40~0.65m.Can be in fill stratum 6 soil microfauna such as breeding earthworm, decompose and the function of dissolving with further raising.
Plant 7 is planted in fill stratum 6.Comprise various xerophytes, as various farm crop, forest, gardening plant etc.Consider from economic angle, preferably select the high nursery stock of economic worth.Nursery stock can be selected suitable kind according to natural condition, for example can select jujube tree fast-growing andhigh-yeilding trees, the artificial fast growing Timber stands of willow etc. in the Northwest, in, the eastern region can select mao bamboo woods, shirt wood fast-growing, high-yield woods], lemon is by fast-growing, high-yield woods etc.Can be during plantation by the grow seedlings high-density standard plantation of bed of Ministry of Forestry.
The using method of ii. plant bed formula sewage recycling treatment system
Pending sewage, as industry or the sanitary sewage after handling through one-level, or through the livestock and poultry sewage after the solid-liquid separation.Contain biological oxygen demand BOD in the sewage
5≤ 400, chemical oxygen demand COD≤600, suspended substance≤400, anion surfactant≤20, total phosphorus (P)≤50, kjeldahl nitrogen≤80.
Under the natural climate condition of temperature 〉=25 ℃, open input valve 10, the close outflow valve door 11 of filtration irrigation device, earlier a certain amount of sewage is sent into infiltrating irrigation pipe 4 by sewage input tube 8, sewage oozes out from the infiltration gap 406 of infiltrating irrigation pipe 4 and enters mixed filler layer 3, can send into a spot of proteolytic enzyme, amylase and lipase again this moment by filtration irrigation device, left standstill about 15 days, and after also slaking is finished in the anaerobic digestion reaction substantially in the packing layer 3 to be mixed, can begin to carry out sewage disposal.
New sewage still through sewage input tube 8 input of filtration irrigation device, is treated that water level rises to overflow height and begins to close input valve 10 when overflow ducts 12 overflows.In temperature 〉=25 ℃, placed 2~4 days.Plant bed by soil dissolve, process such as microbiological degradation, plant absorbing, the objectionable impuritiess such as organic and inorganic compound of the heavy metal ion in the sewage, not complete oxidation and degraded are digested quickly and efficiently and decompose.In this process,, when meeting national agricultural irrigation water quality standard (GB5084-92 1992-10-01), open output valve 11 and discharge by sewage output tube 11 by every index of overflow ducts 12 continuous monitoring sewage.Because siphonic effect, the sewage of having handled in plant bed will advance infiltrating irrigation pipe 4 by infiltration gap 406 reverse osmosis, and discharge continuously.The water of discharging can be supplied with field irrigation and use.
The each several part function of iii. plant bed formula sewage recycling treatment system
Mixed filler layer 3, cobble and rough sand can adsorb phosphorus, brown coal decompose in anaerobic digestion process and produce humic acid, are good alkaline land modifying agent and infertile field agent, coke can adsorb a large amount of microorganisms and ammonia nitrogen, and impel the two " get close to " successive reaction.Have high-density and the anaerobion of height after the slaking in this zone, can carry out a large amount of, mass-energy exchange uniformly with sewage.
Filtration irrigation device is used for conveying, distribution and sewage effluent.The unique texture of infiltrating irrigation pipe 4 can make sewage be distributed in fast, equably plant bed in, can shorten the treatment time greatly, improve treatment effect; Can stop effectively mud, suspended substance in the sewage enter plant bed in, the processing efficiency of assurance system long-term stability; A large amount of air regularly can be incorporated in water conservation layer 5 and the fill stratum 6, make the amount of oxygen in this layer reach more than 100 times of the oxygenous amount of normal soil layer, strengthened facultative greatly and breeding diffusibility aerobic microbiological, made its proliferative speed be exponential increase.In addition, can monitor the variation of water quality, control entire reaction course neatly by pipe network system, guarantee physics, chemistry, biological respinse can be fast, comprehensively, stable, carry out smoothly.
Water conservation layer 5 plays maintenance and transmits water, fertilizer, action of microorganisms, and can hold back a part of rain, snow-broth for plant absorbing, is aerobic-anaerobic microbe breeding and growth construction favourable condition in this zone.
Fill stratum 6 forms aerobic microbiological breeding and vitellarium.The sandy soil mixolimnion helps oxygen and diffuses to the silty loam top layer rapidly, and the aerobic and aerobic-anaerobic microbe formation new round mass-energy exchange with the top layer promotes the growth of soil microorganisms population to greatest extent.In addition, the soil microfaunas such as earthworm of growth in the fill stratum 6 can further improve and decompose and the function of dissolving.
Plant 7, root system can absorb a large amount of moisture, nutrient and various trace elements in process of growth under it, the ground blade is carrying out the photosynthetic while, borrow transpiration that subterranean these moisture, nutrient and trace element are absorbed in the body on the one hand, also the root system part is gone in the part nutritive substance reverse pumping that produces behind the photosynthesis on the other hand, in the root system fast development, also promoted the decomposition of organic substance in the water and soil.Owing to possessed eutrophy, juicy and advanced conditions such as filtration irrigation device in plant bed, can support the close plantation of height of plant 7.And, the transplanting by nursery stock can be a large amount of, successive takes away rich nutritive material and trace element in the fill stratum, further strengthened wastewater treatment efficiency.
System is after operation for some time, can deposit a spot of reaction mud in its bottom, when the anaerobic digestion function reduction to previous level 30% the time, reaction mud in time should be taken out, and be added in the fill stratum 6 by the amount that accounts for fill stratum 6 volume ratios 20%, can eliminate the nutrient that mud again can supplementary table fill stratum 6 like this, and when nursery stock transplanting, can go out with the female soil zone of seedling root again.
To have a strong impact on wastewater treatment efficiency and seedling growth because low temperature winter, can import sewage after heating by filtration irrigation device, to keep the condition of physics, biochemical reaction; In addition, add plastic greenhouse, be formed with the envrionment conditions that is beneficial to seedling growth, also help to keep the basic function of disposing of sewage, and carry out the anti-season plantation, obtain good nursery stock economic return on plant bed top.And lasting precipitation often arranged in spring, summer, when water level surpassed overflow height in plant bed, rainwater formed external pressure, entered infiltrating irrigation pipe 4 in a large number and drained flooded fields automatically by overflow ducts 12.Thus, can realize continuous, normal operation of the four seasons.
Iv. industrial applicability
The plant bed formula sewage recycling treatment system that the utility model provides is controlled current wetland sewage disposal of a kind of dry farming formula and resource utilization application system.With area 1000m
2Treatment facility calculate, total investment for construction is 8000~10000 yuan, the sewage load that can carry every day is 50~100m
3, every cubic metre cost of sewage disposal≤0.10 yuan, the sewage after the processing can provide above the dry farming field irrigation of 10~30 times of facility areas and use or 30~50 times windproof, greening forest are irrigated and use, the net income of annual nursery stock 〉=5000 yuan.Has good industrial application prospect.
More than combine embodiment the plant bed formula sewage recycling treatment system that the utility model provides is illustrated, but this does not constitute restriction of the present utility model.Any modifications and variations of having done under same design also all belong to the scope that the utility model is protected.