CN103482818A - Cyclic utilization mode for azolla biological cleaning biogas slurry - Google Patents
Cyclic utilization mode for azolla biological cleaning biogas slurry Download PDFInfo
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- CN103482818A CN103482818A CN201310408135.7A CN201310408135A CN103482818A CN 103482818 A CN103482818 A CN 103482818A CN 201310408135 A CN201310408135 A CN 201310408135A CN 103482818 A CN103482818 A CN 103482818A
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Abstract
The invention relates to a cyclic utilization mode for azolla biological cleaning biogas slurry. The cyclic utilization mode is characterized by comprising the following steps of introducing a liquid obtained from solid-liquid separation of excreta of poultry breeding into a fermentation tank so as to generate methane and biogas slurry, preparing concentrated biogas slurry and a filtered liquid from the biogas slurry through a film filtering device, passing the filtered liquid prepared through film filtration through an azolla biological percolation device and an azolla water breeding device, so that the effluent of the azolla water breeding device meets the requirements on up-to-standard emission, and the azolla which grows and breeds in the azolla water breeding device is machined into a poultry feed for poultry breeding. According to the cyclic utilization mode, up-to-standard emission of sewage of large-scale farms is achieved due to adoption of phytoextraction and biologic percolation functions of aquatic azolla, toxicity and harm are prevented, no secondary pollution is caused, and meanwhile land area for digesting and storing the biogas slurry is greatly reduced by 20-120 times.
Description
Technical field
The present invention relates to a kind of red duckweed biopurification natural pond liquid Cycling And Utilizing Patterns.
Background technology
The livestock breeding wastewater of livestock and poultry farm discharge, press GB/T 50363-2006 standard code, and the natural pond liquid that need produce through the biogas engineering fermentation could be used for also field after harmless treatment.Forbid to sneak into other poisonous, harmful sewage or mud.Do not pass through the excrement dirt of the abundant fermentative processing of biogas engineering, should not adopt also field of pipeline.Yet the natural pond liquid measure that biogas engineering fermentation produces is very large, space required enough large field is dissolved.According to the different crop measuring and calculating natural pond liquid quantity of dissolving safely.The excrement dirt that livestock on hand live pig 1-2 head produces of dissolving of 1 mu of herbary, other crops should, according to being no more than maximum fertilizer requirement, be calculated design cultivation scale and the cultivated area for dissolving.To plant and the culture zone with different livestock and poultry kinds, its scale can be converted into the cultivation amount of chicken, ox the cultivation amount of pig, and concrete conversion scale is pressed GB 18596-2001 and carried out.
Generally, 1 the natural pond liquid that ten thousand pig farms will have the farmland of area more than 5000 mu just can dissolve and produce continually.If farmland area and methane-generating pit scale are not complementary, natural pond liquid just must outward transport.Because biogas follow-up service system is unsound at present, the biogas service organizations is less in addition, and the natural pond liquid that makes biogas engineering produce can't be realized outward transport.On the one hand, the biogas owner is reluctant to bear voluntarily all charges that natural pond liquid transports; On the other hand, the auxiliary facility of natural pond liquid utilization comprises field storage pool, equalizing tank, filtration unit, transport pipeline and spray drip irrigation equipment, and peasant household is difficult to fully bear.Therefore, great majority are to rely on artificial the filling to execute present stage.Transportation inconvenience, become natural pond liquid mass-producing utilization and be difficult to another major obstacle improved.
Natural pond liquid application model development obstacles be to need the big area soil to dissolve natural pond liquid that biogas engineering produces continually.Existing natural pond liquid application model mainly contains pig-natural pond-rice, pig-natural pond-really, pig-natural pond-nursery stock, pig-natural pond-dish, pig-natural pond-herbage etc., no matter the crop of application is paddy rice, watermelon, oranges and tangerines, vegetables, or, all there is identical problem in mao bamboon, tealeaves, nursery stock and herbage etc.Southeast is one of highly intensive important area of China's agricultural, and its surrounding ground is limited, populous, and the natural pond liquid of most of biogas engineerings can't be digested and assimilated by soil, and environment has been caused to quite serious secondary pollution.
Summary of the invention
The present invention improves the problems referred to above; be that the technical problem to be solved in the present invention is to provide a kind of large-scale cultivation field sewage qualified discharge of realizing; nontoxic, harmless, can not produce any secondary pollution, can significantly reduce the natural pond liquid Cycling And Utilizing Patterns of the required land area of natural pond liquid of dissolving simultaneously.
The specific embodiment of the invention scheme is: a kind of red duckweed biopurification natural pond liquid Cycling And Utilizing Patterns comprises the following steps:
(1) will hold in the liquid importing fermentor tank after fowl cultivates the movement solid-liquid separation formed and form biogas and natural pond liquid;
(2) natural pond liquid is formed to concentrated natural pond liquid and filtered liquid by membrane filter appts;
(3) flow through the successively biological percolating device of red duckweed and red duckweed water of filtered liquid step (2) formed is supported device, and the water outlet that makes red duckweed water support device meets the requirement of qualified discharge;
(4) red duckweed step (3) growth and breeding gone out is processed into and holds the fowl feed supply and hold fowl cultivation.
Further, the biological percolating device of described red duckweed is comprised of bacteria bed, filtering layer filtrate and water circulation system, and described filtering layer filtrate is the extra dry red wine duckweed, and described extra dry red wine duckweed pack is placed in bacteria bed.
Further, the foster device of described red duckweed water is outdoor outdoor cultivation.
Further, it is the warmhouse booth cultivation that described red duckweed water is supported device, is provided with the multilayer culturing pool in booth, and filtered liquid recycles as red duckweed nutrient solution, until water body meets the qualified discharge requirement, can discharge.
Further, the solid held after the movement solid-liquid separation that fowl cultivation forms is processed to form fertilizer.
Further, the biogas formed in described fermentor tank forms fuel feed and holds the insulation of fowl culturing chamber or gas for kitchen use.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention has set up a kind of " live pig-natural pond liquid-red duckweed " and has purified natural pond liquid Cycling And Utilizing Patterns, and red duckweed is a kind of aquatic fern of high fixed nitrogen, and its breeding is fast, output is high, nutritious, protein content is high.Feed, bait can be made, fertilizer can be made again.In addition, red duckweed has certain durability against pollution, by the inrichment of live body and the physisorption of stem body, can effectively remove the nutritive elements such as nitrogen in water, phosphorus, absorb and each heavy metal species of enrichment, toxic compounds the increase dissolved oxygen, degraded COD, make eutrophic water become limpid.Simultaneously, red duckweed and effluent cycle recycling after decontamination is processed, break through the difficult problem of clean dirty biological treatment.
(2) natural pond liquid is after membrane filter appts, and concentrated solution only accounts for the 5-10% of total filtration yield, can direct marketing to fertilizer factory, because concentrated solution contains the plant nutrient substance more than 90%, concentration is high, traffic capacity is few, and the organic fertilizer production cost declines to a great extent, and remarkable in economical benefits improves.
(3) natural pond liquid is after membrane filter appts, and filtered liquid does not still reach emission standard, needs plant to dissolve.The present invention adopts the red duckweed technique of dissolving, red duckweed fast growth, and the strong volume of water purification ability is little, during purification, can adopt the multi-layer biological cleanup form, can meet under the qualified discharge prerequisite, significantly reduces the required land area of natural pond liquid of dissolving, and can reduce 20 ~ 120 times.
Therefore; in " live pig-natural pond liquid-red duckweed " pattern; red duckweed has the feature of superpower plant extraction and purifying water body; possess degradable organic pollutant and the effect of safeguarding the water body balance; to promoting scale animal and poultry cultivation sewage qualified discharge to play active effect, it is the good material of purifying eutrophication water body.On hills, the southeast, the middle and lower reach of Yangtze River, and vast southern area apply this pattern, can avoid the pollution of natural pond liquid to peripheral waters, carry out permanent improvement from the source that produces pollution of area source, be conducive to prevent the deterioration of peripheral ecotope.
The accompanying drawing explanation
Fig. 1 is the red duckweed biopurification of the present invention natural pond liquid Cycling And Utilizing Patterns artwork.
embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
As shown in Figure 1, a kind of red duckweed biopurification of the present invention natural pond liquid Cycling And Utilizing Patterns, comprise the following steps:
(1) will hold in the liquid importing fermentor tank after fowl cultivates the movement solid-liquid separation formed and form biogas and natural pond liquid;
(2) natural pond liquid is formed to concentrated natural pond liquid and filtered liquid by membrane filter appts;
(3) filtered liquid step (2) formed is successively by the biological percolating device of red duckweed, and red duckweed water is supported device filtered liquid is formed to the clear water of qualified discharge;
(4) red duckweed step (3) formed is processed into and holds the fowl feed supply and hold the fowl cultivation.
Solid after holding movement solid-liquid separating machine that fowl cultivation forms and separating is processed to form fertilizer, and liquid enters fermentation vat and produces biogas and natural pond liquid, and biogas is delivered to farm house as kitchen fuel by a biogas pipeline part, and another part can be used as the heating that cultivates factory.
The natural pond liquid that comes from settling tank first passes through membrane filter appts, can't be by the direct canned sale of the concentrated solution of film or for processing fertilizer after press filtration; Natural pond liquid is after membrane filter appts, and concentrated solution only accounts for the 5%-10% of total filtration yield, can direct marketing to fertilizer factory, because concentrated solution contains the plant nutrient substance more than 90%, concentration is high, traffic capacity is few, and the organic fertilizer production cost declines to a great extent, and remarkable in economical benefits improves.
Press filtration, by the filtered liquid of film, after the red duckweed percolating device of flowing through, is supported the Cyclic culture liquid of device as red duckweed water.The red duckweed that the foster device of red duckweed water is produced is processed into feed, the sow of feeding, and fecund is young, produces good son, or the live pig of feeding; And the foster device discharge of red duckweed water is the requirement that clear water can meet qualified discharge, also can be for the daily flushing of pig house.Form so red duckweed biopurification efficient circulation and utilize pattern.
The biological percolating device of described red duckweed is comprised of bacteria bed, filtering layer filtrate and water circulation system, and described filtering layer filtrate is the extra dry red wine duckweed, and described extra dry red wine duckweed pack is placed in bacteria bed.It is outdoor outdoor cultivation that described red duckweed water is supported device, can also go up the warmhouse booth cultivation, is provided with the multilayer culturing pool in booth to realize dwindling space, is meeting under the qualified discharge prerequisite, significantly reduces the required land area of natural pond liquid of dissolving, and can reduce 20～120 times.Simultaneously, the present invention adopts red duckweed as the biological percolating device of diafiltration material development, utilizes plant extraction and the biological diafiltration function of the red duckweed of hydrobiont, realizes large-scale cultivation field sewage qualified discharge, nontoxic, harmless, can not produce any secondary pollution.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. a red duckweed biopurification natural pond liquid Cycling And Utilizing Patterns, is characterized in that, comprises the following steps:
(1) will hold in the liquid importing fermentor tank after fowl cultivates the movement solid-liquid separation formed and form biogas and natural pond liquid;
(2) natural pond liquid is formed to concentrated natural pond liquid and filtered liquid by membrane filter appts;
(3) flow through the successively biological percolating device of red duckweed and red duckweed water of filtered liquid step (2) formed is supported device, and the water outlet that makes red duckweed water support device meets the requirement of qualified discharge;
(4) red duckweed step (3) growth and breeding gone out is processed into and holds the fowl feed supply and hold fowl cultivation.
2. a kind of red duckweed biopurification according to claim 1 natural pond liquid Cycling And Utilizing Patterns, it is characterized in that, the biological percolating device of described red duckweed is comprised of bacteria bed, filtering layer filtrate and water circulation system, and described filtering layer filtrate is the extra dry red wine duckweed, and described extra dry red wine duckweed pack is placed in bacteria bed.
3. a kind of red duckweed biopurification according to claim 1 and 2 natural pond liquid Cycling And Utilizing Patterns, is characterized in that, it is outdoor outdoor cultivation that described red duckweed water is supported device.
4. a kind of red duckweed biopurification according to claim 1 and 2 natural pond liquid Cycling And Utilizing Patterns, it is characterized in that, it is the warmhouse booth cultivation that described red duckweed water is supported device, be provided with the multilayer culturing pool in booth, filtered liquid recycles as red duckweed nutrient solution, until water body meets the qualified discharge requirement, can discharge.
5. a kind of red duckweed biopurification according to claim 1 natural pond liquid Cycling And Utilizing Patterns, is characterized in that, the solid held after the movement solid-liquid separation that fowl cultivation forms is processed to form fertilizer.
6. a kind of red duckweed biopurification according to claim 1 natural pond liquid Cycling And Utilizing Patterns, is characterized in that, the biogas formed in described fermentor tank forms fuel feed and holds the insulation of fowl breeding house or gas for kitchen use.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951145A (en) * | 2014-01-27 | 2014-07-30 | 青岛市畜牧兽医研究所 | Method for harmless treatment and recycling of livestock and poultry breeding manure waste |
| CN109601093A (en) * | 2018-12-06 | 2019-04-12 | 丽水职业技术学院 | A biogas slurry application method for improving tea safety |
| CN110921987A (en) * | 2019-12-07 | 2020-03-27 | 湖南袁禾农业科技有限公司 | Harmless and recycling waste treatment method |
| CN115152554A (en) * | 2022-07-18 | 2022-10-11 | 福建省农业科学院农业生态研究所 | Biogas-duckweed-fish-lotus root ecological planting and breeding system |
| CN115152607A (en) * | 2022-07-18 | 2022-10-11 | 福建省农业科学院农业生态研究所 | Ecological planting and breeding method for purifying culture biogas slurry by utilizing azolla |
| CN115211339A (en) * | 2022-07-18 | 2022-10-21 | 福建省农业科学院农业生态研究所 | Biogas-duckweed-fish-rice ecological planting and breeding system |
-
2013
- 2013-09-10 CN CN201310408135.7A patent/CN103482818B/en not_active Expired - Fee Related
Non-Patent Citations (2)
| Title |
|---|
| 刘明庆等: "东江源头区"猪 沼 果 鱼"生态农业模式关键技术与面源污染控制分析", 《生态与农村环境学报》 * |
| 樊海平等: ""猪-沼-萍-鱼"草鱼池塘高效生态养殖模式", 《科学养鱼》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103951145A (en) * | 2014-01-27 | 2014-07-30 | 青岛市畜牧兽医研究所 | Method for harmless treatment and recycling of livestock and poultry breeding manure waste |
| CN109601093A (en) * | 2018-12-06 | 2019-04-12 | 丽水职业技术学院 | A biogas slurry application method for improving tea safety |
| CN110921987A (en) * | 2019-12-07 | 2020-03-27 | 湖南袁禾农业科技有限公司 | Harmless and recycling waste treatment method |
| CN115152554A (en) * | 2022-07-18 | 2022-10-11 | 福建省农业科学院农业生态研究所 | Biogas-duckweed-fish-lotus root ecological planting and breeding system |
| CN115152607A (en) * | 2022-07-18 | 2022-10-11 | 福建省农业科学院农业生态研究所 | Ecological planting and breeding method for purifying culture biogas slurry by utilizing azolla |
| CN115211339A (en) * | 2022-07-18 | 2022-10-21 | 福建省农业科学院农业生态研究所 | Biogas-duckweed-fish-rice ecological planting and breeding system |
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| CN103482818B (en) | 2015-01-21 |
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