CN102161550A - Method for producing feed additive from livestock and poultry breeding wastewater and purifying breeding wastewater to reclaimed water - Google Patents
Method for producing feed additive from livestock and poultry breeding wastewater and purifying breeding wastewater to reclaimed water Download PDFInfo
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Abstract
The invention relates to the fields of environmental technology and the breeding and processing of microalgae, in particular to a method for producing feed additive from livestock and poultry breeding wastewater and purifying breeding wastewater to reclaimed water. The method is characterized by comprising the following steps that: wastewater enters an acidification adjusting tank through a grille, and the acidified wastewater enters an anaerobic biochemical reactor for treatment and then enters an aerobic biochemical reactor; after the aerobic biochemical treatment, the obtained biogas slurry enters a settling tank for settling, the supernatant enters a membrane bioreactor for further aerobic treatment and is filtered by an ultrafiltration membrane, the generated ultrafiltration clear liquid is sterilized and neutralized and then enters a photobioreactor, algae are added into the photobioreactor to perform microalgae cultivation, and the algae liquid is discharged from the photobioreactor and then enters a flocculation and settling tank; and after flocculation and settling, the supernatant is used for water recycling, the concentrated algae liquid at the bottom enters a filter, and the separated microalgae slurry enters a fermentation/enzymolysis pot (tank) to perform fermentation/enzymolysis to be used as the feed additive. The invention has the advantages of high economic adaptability, zero discharge and the like.
Description
[technical field]
The present invention relates to green technology, both culturing microalgae and manufacture field, and specifically a kind of livestock and poultry cultivation sewage is used for the method for producing fodder additives and being cleaned into water.
[background technology]
Body eutrophication is meant the too much caused water pollution phenomenons of plant nutrient substance content such as nitrogen, phosphorus.Body eutrophication has restricted lake drainage regional economy and social sustainable development, has become one of global serious ecological environment problem.Livestock and poultry cultivation ight soil is to cause the one of the main reasons of body eutrophication with the flushing sewage emissions.According to statistics, livestock and poultry feces chemical oxygen demand (COD) (COD) quantity discharged reached 1268.3 ten thousand tons in 2007, accounted for 41.9% of national COD total release.A large amount of waste water of livestock and poultry cultivation discharging without properly recycling and handling, dispose promptly directly discharging, have caused serious pollution to environment mostly.Yet feces of livestock and poultry is source of pollution, also is a kind of resource that can develop.In the feces of livestock and poultry resource, the ight soil of big-and-middle-sized plant is more convenient for concentrating exploitation and mass-producing utilization.The main livestock and poultry of China are pig, ox and chicken, and the big-and-middle-sized pig of China, ox, about more than 6000 families of chicken house discharge more than 80 ten thousand tons in fecaluria and flushing sewage every day at present, and national annual fecal sewage stock number reaches 300,000,000 tons.
Livestock and poultry cultivation sewage disposal pattern mainly contains also field pattern, natural tupe and industrial treatment pattern both at home and abroad.Also the field pattern both can effectively be disposed pollutent, wherein useful nutritive ingredient can be circulated in again in the soil-plant ecosystem, and the fecal sewage that family divides the casual household to raise livestock and poultry is handled this method that all adopts.The nature tupe mainly adopts natural treatment systems such as oxidation pond, sandy soil filtration system or artificial swamp that plant's fecal sewage is handled, be applicable to apart from the city far away, temperature is higher and the soil is broad, have beach, wasteland, forest land or bottom land can do the economically underdeveloped area of sewage natural treatment system, and to require plant's scale be medium level.The industrial treatment pattern comprises various combination treatment systems such as anaerobic treatment, aerobic treatment and anaerobic-aerobic.Those are located in the economically developed suburbs, big city, soil anxiety and do not have the large-scale farming field of dissolving fecal sewage or carry out the nature processing in enough farmlands, adopt industrial treatment pattern purifying treatment swine manure wastewater to be advisable.Along with quickening of urbanization process, the rapid expansion and the high concentration of urban population extremely increase the demand of animal products, be convenient transportation, processing and sale, livestock and poultry farm is located at the suburbs, city mostly, and therefore, the batch production tupe of livestock and poultry cultivation sewage is used more and more widely.
Because livestock and poultry cultivation sewage belongs to high concentrated organic wastewater, nitrogen, phosphorus content height, nitrated/denitrification process carbon source deficiency, COD can be up to standard often to adopt the batch production tupe, nitrogen, phosphorus then are difficult to up to standard, still contain nutritive substances such as more nitrogen, phosphorus in the water outlet, cause body eutrophication easily.SBR, Anammox technology commonly used at present, by the effect of nitrifier, ammonia nitrogen is converted into nitrite nitrogen, nitric nitrogen through nitrated, and then utilizes denitrifying bacteria that nitric nitrogen is converted into nitrogen, reach denitrogenation purpose from waste water, yet this mode has directly caused the loss of nitrogenous fertilizer; And the means of dephosphorization are very limited especially, and phosphor-removing effect is very undesirable.In addition, livestock and poultry cultivation sewage water quality standard after treatment just reaches " livestock and poultry breeding industry pollutant emission standard " (GB 18596-2001) at present, and be difficult to reach middle water quality standard as " urban sewage reutilization water for scenic environment use water quality standard " (GB/T 18921-2002), therefore, the livestock and poultry cultivation sewage after conventional batch production is handled is seldom by the livestock and poultry farm reuse.
Along with the fast development of large-scale cultivation field, it is comparatively general to add heavy metal elements such as zinc, copper in feed, for example, uses high-copper also quite general as the feed additive for promoting growth of pig.Suitably heavy metal element can improve the growth performance of livestock and poultry, for Production of Livestock and Poultry is brought good growth efficiency.Yet, most of heavy metal of high dosage heavy metal fodder additives can excrete with feces of livestock and poultry, for example, enter the copper of livestock and poultry body interior 90% and 90%～95% zinc and from ight soil, discharge, directly cause the heavy metal content severe overweight in feces of livestock and poultry and the plant's sewage.It is reported that the annual heavy metal element additive that uses in feed of China is 15～180,000 tons, wherein nearly 100,000 tons of heavy metals are not utilized and to discharge livestock and poultry external.When the farmland is irrigated plant's sewage or natural pond liquid for a long time, heavy metal element can produce accumulation in soil, thereby soil property is produced certain negative impact, as suppressing crop growth, reducing crop yield and quality; And crop also may too much absorb the heavy metal element in the soil, after animal and human eating, endangers the health of animal and human's class the most at last.
[summary of the invention]
The objective of the invention is to solve the insoluble denitrogenation of common process in the present livestock and poultry cultivation sewage disposal, dephosphorization, go common problems such as heavy metal, utilize anaerobic biological technical finesse livestock and poultry cultivation sewage, produce biogas and carry out heat supply, after again sewage being carried out aerobic treatment, be deployed into nutrient solution, and feed the CO 2 waste gas cultivating microalgae that biogas burning back produces, and little algae can absorb heavy metal elements such as nutritive salt such as nitrogen in the livestock and poultry cultivation sewage, phosphorus and zinc, copper in a large number in process of growth.
To achieve these goals, the present invention designs a kind of livestock and poultry cultivation sewage and is used for the method for producing fodder additives and being cleaned into water, it is characterized in that may further comprise the steps:
1), livestock and poultry cultivation anerobic sowage-aerobic treatment
After liquid dung that a, flushing livestock and poultry colony house produce and livestock and poultry excretory urine import the bilge main of livestock and poultry farm, after removing than mechanical impuritys such as big floating matters, grid enters the acidifying equalizing tank, regulate the sewage water yield, water quality, pH value, add the anterior part active sludge slurry that produces of follow-up anaerobic biochemical reactor at the rear portion of acidifying equalizing tank, long-chain in the sewage, larger molecular organics are decomposed into short chain, small organic molecule, improve the biodegradability of livestock and poultry cultivation sewage;
B, with solid-liquid separating machine the excrement slag is separated from sewage and to be made compost, the sewage after acidification enters and carries out anaerobic biological in the anaerobic biochemical reactor and handle, and the collecting methane that produces in the anaerobic biochemical reactor is to gas holder;
C, anaerobic biochemical reactor is handled natural pond liquid that the back produces join and carry out aerobic biochemical in the aerobic biochemical reactor and handle, further reduce BOD, the COD of natural pond liquid, and the ammonia nitrogen in the liquid of natural pond is converted into nitrate or the nitrite that is absorbed by little algae easily, eliminate the peculiar smell of natural pond liquid simultaneously;
2), natural pond liquid is cleaned into middle water with membrane bioreactor, bioreactor
A, the natural pond liquid after aerobic biochemical is handled enter the settling tank precipitation, and the mud slurry of bottom is collected in the mud storage pond, can make compost with the mud after the plate-and-frame filter press press filtration, and filtrate turns back to anaerobic biochemical reactor and continues to handle;
Supernatant liquid in b, the settling tank enters membrane bioreactor and does further aerobic treatment, and the ultrafiltration membrance filter in membrane bioreactor removes various fine suspended substances and bacterium, and the mud that membrane bioreactor produces regularly discharges back settling tank or adds to the aerobic biochemical reactor makes active sludge;
The ultrafiltration clear liquid that c, the ultrafiltration membrance filter in membrane bioreactor produce is collected in the sterilization pool, add the sterilizing agent sterilization, add then in the neutralizing agent with behind the thimerosal and enter into bioreactor as main nitrogenous source and the phosphorus source of little algae cultivation, in bioreactor, add algae kind and a small amount of necessary nutritive salt, and the CO 2 waste gas of feeding biogas burning back generation, carry out the little algae of closed smooth autotrophy high-density breeding, absorb heavy metal elements such as nitrogen phosphorus in the nutrient solution and zinc, copper simultaneously with little algae;
D, through micro algae growth week after date from bioreactor, discharges algae liquid and enters into flocculation sedimentation tank, in the pond, add the flocculation agent precipitation, upper clear supernate is collected in the middle pond and is used as reuse water;
3), produce fodder additives and prepare livestock and poultry diet with little algae
A, after the effusive concentrated algae liquid in flocculation sedimentation tank bottom pumps up, enter filter, be used as reuse water in the pond during the filtrate that filters out also is collected in;
B, enter fermentation/enzymatic vessel (pond) through the isolated little algae slurry of filter, add activated bacterial classification and prozyme ferment/enzymolysis after, become the little algae feedstuff additive of fine;
C, little algae feedstuff additive added with the livestock and poultry conventional feed that does not add heavy metal elements such as zinc, copper mix in the proportioning machine, be mixed with livestock and poultry diet.
( UASB ) ( IC ) ( EGSB ) ( EC ) ( USR ) ( ABR ) - ( UBF ) ( AF ) ( AHR ) ( ASBR ) ( AEBR ) ( AFBR ) ( ARBC ) ( UFB Biobed ) ( AF+UASB ) 。
Described aerobic biochemical reactor can adopt active sludge aeration tank or BAF or aerobic biofilter or biological contact oxidation pond or oxidation ditch or oxidation pond or CASS aerobic biochemical pond or sbr reactor pond or aerobic biological fluid-bed or droplet filter bed or aerobe rotating disk.
Described membrane bioreactor can adopt polymeric membrane bio-reactor or ceramic membrane bioreactor.
Described bioreactor is for can adopt duct type bioreactor or flat bioreactor or column airlift photobioreactor or vertical Pig or closed shallow annular pond.
Described sterilizing agent is clorox or ozone or dioxide peroxide or ultraviolet ray, and described neutralizing agent adopts Sulfothiorine.
Described little algae is chosen green alga or chrysophyceae or diatom or blue-green algae or the red algae in the freshwater microalgae, can adopt to contain the high chlorella of protein or scenedesmus obliquus or spirulina.
Described flocculation agent is microbial flocculant or the natural macromolecule flocculating agent harmless to livestock and poultry, can adopt chitosan flocculant.
Described bacterial classification can adopt lactobacillus or Candida utilis or genus bacillus.
Described prozyme can adopt cellulase or proteolytic enzyme or lipase prozyme.
The present invention compared with prior art, its advantage has been to break traditional pollution treatment theory, in efficient pollution treatment, produce high value added product, and realized the recycle of feed nutrient and water resources in the livestock and poultry cultivation, in the batch production tupe of the livestock and poultry cultivation sewage of routine, introduce cultivating microalgae and deeply treating wastewater, given full play to the high nutritive value of economic little algae, to the sorption of nitrogen phosphorus, to the accumulation ability of heavy metal ion.Concrete grammar is behind existing conventional anaerobic-aerobic treatment process, the serial connection membrane bioreactor further reduces BOD and COD, remove cotton-shaped fine mud and bacterium in the sewage simultaneously, then with the little algae of nitrogen-phosphorus wastewater culturing economic after the ultrafiltration, and little algae is processed into the high-quality feed additive, and be used further to raise livestock and poultry, can effectively solve feedstuff protein source shortage problem, can reduce simultaneously aquaculture cost and antibiotic dosage, heavy metal element addition, improve the meat of animal products; Sewage then further is cleaned into middle water, can be used for colony house that washes livestock and poultry cultivation etc., the conserve water resource.
The present invention also has following advantage:
1. livestock and poultry cultivation sewage is after conventional anaerobic-aerobic biochemical treatment, be connected in series membrane bioreactor again, bioreactor is made advanced treatment, become middle water and reuse after removing fine suspended substance, nitrogen phosphorus and heavy metal ion, both realize the zero release of aquaculture wastewater, reduced the water consumption of livestock and poultry cultivation again significantly;
2. solved the difficult problem of livestock and poultry cultivation sewage denitrification and dephosphorization, by cultivating microalgae absorbed nitrogen phosphoric, and little algae is processed into fodder additives for the livestock and poultry recycles, cause nitrogen nutrition to run off thereby abandoned traditional nitrated/denitrification denitrogenation mode, and poly-phosphorus precipitation dephosphorization produce the secondary pollution problem of mud;
3. solved the difficult problem of livestock and poultry cultivation sewage removal heavy metal ion, by strong absorption of cultivating microalgae and absorption heavy metal element, and little algae is processed into fodder additives for the livestock and poultry recycles, both avoided the heavy metal contamination of livestock and poultry cultivation sewage, reduced again because of in feed, adding the aquaculture cost that heavy metal element increases;
4. utilize the general insufficient biogas of livestock and poultry farm utilization ratio, provide carbonic acid gas raw material and insulation heat, give full play to the utility value of biogas, and reduced the carbon emission in the livestock and poultry cultivation process for supporting algae;
5. use little algae undried of livestock and poultry cultivation fish-farming with sewage, directly produce fodder additives, and in time be mixed with livestock and poultry diet and feed and to raise livestock and poultry, avoided making in conventional little algae production process the huge energy consumption for drying of little algae dry powder through fermentation/enzymolysis operation;
6. little algae feedstuff additive has been saved the transportation cost of conventional feed additive from the manufacturing enterprise to the livestock and poultry farm the local production of livestock and poultry farm, the local use.
[description of drawings]
Fig. 1 is a production scheme of the present invention;
Fig. 2 is the change of water quality figure of the pig farm sewage purification Cheng Zhongshui process of the embodiment of the invention;
Fig. 3 is the nutritive ingredient figure (in butt) of the scenedesmus obliquus fodder additives of the embodiment of the invention;
[embodiment]
The invention will be further described below in conjunction with embodiment that accompanying drawing and accompanying drawing provide.Production technology of the present invention is to implement easily to this professional people.
With reference to Fig. 1, the method for the invention may further comprise the steps:
A. livestock and poultry cultivation anerobic sowage-aerobic treatment
After liquid dung that flushing livestock and poultry colony house produces and livestock and poultry excretory urine import the bilge main of livestock and poultry farm, after removing than mechanical impuritys such as big floating matters, grid enters the acidifying equalizing tank, regulate the sewage water yield, water quality, pH value, add the anterior part active sludge slurry that produces of follow-up anaerobic biochemical reactor at the rear portion of acidifying equalizing tank, long-chain in the sewage, larger molecular organics are decomposed into short chain, small organic molecule, improve the biodegradability of livestock and poultry cultivation sewage.With solid-liquid separating machine the excrement slag is separated from sewage then and made compost, and the sewage after acidification enters and carries out anaerobic biological in the anaerobic biochemical reactor and handle.The collecting methane that anaerobic biochemical reactor produces is used for the hot water boiler combustion heat supplying to gas holder.The natural pond liquid that anaerobic biochemical reactor produces joins and carries out the aerobic biochemical processing in the aerobic biochemical reactor, further reduces BOD, the COD of natural pond liquid, and ammonia nitrogen is converted into nitrate or the nitrite that is absorbed by little algae easily, eliminates the peculiar smell of natural pond liquid simultaneously;
B. with membrane bioreactor, bioreactor natural pond liquid is cleaned into middle water
Natural pond liquid after aerobic biochemical is handled is through the settling tank post precipitation, and the mud slurry is collected in the mud storage pond, and after the plate-and-frame filter press press filtration, filtrate turns back to anaerobic biochemical reactor continues to handle, and the mud after the press filtration can be done compost treatment.The supernatant liquid of settling tank enters membrane bioreactor and does further aerobic treatment, and removes various fine suspended substances and bacterium behind the ultrafiltration membrance filter in membrane bioreactor accurately, for next step foster algae denitrogenation dephosphorizing has been created basic condition.The mud that membrane bioreactor produces regularly is discharged into settling tank or replenishes and is the active sludge of aerobic biochemical reactor.The ultrafiltration clear liquid that membrane bioreactor produces is collected in the sterilization pool, adds sterilizing agent and carries out disinfection, and kills harmful organisms wherein, adds in the neutralizing agent then and thimerosal, joins at last in the bioreactor and cultivates main nitrogenous source and phosphorus source as little algae.In bioreactor, add algae kind and a small amount of necessary nutritive salt, and feed the CO 2 waste gas that biogas burning back produces, carry out the little algae of closed smooth autotrophy high-density breeding, simultaneously with heavy metal elements such as the nitrogen phosphorus in little algae absorption nutrient solution and zinc, copper.From bioreactor, discharge algae liquid through all after dates of a micro algae growth and enter into flocculation sedimentation tank, after the adding flocculation agent flocculates little algae and sedimentation in the pond, be used as reuse water in the pond during upper clear supernate is collected in;
C. produce fodder additives and prepare livestock and poultry diet with little algae
After pumping up, the effusive concentrated algae liquid in flocculation sedimentation tank bottom enters filter, during also being collected in, the filtrate that filters out is used as reuse water in the pond, isolated little algae starches not that drying directly adds fermentation/enzymatic vessel (pond), and then adds activated bacterial classification and prozyme.Little algae is behind fermentation/enzymolysis, and the ratio of amino acid, unsaturated fatty acids, little polysaccharides isoreactivity material significantly rises, and becomes the little algae feedstuff additive of fine.Since little algae from sewage enrichment help the heavy metal elements such as zinc, copper of growth of animals or poultry, fresh little algae feedstuff additive added with the livestock and poultry conventional feed that does not add heavy metal elements such as zinc, copper mix in the proportioning machine, be mixed with livestock and poultry diet and feed and raise livestock and poultry.
Build waste disposal plant, both culturing microalgae and processing units the year deliver the large-scale pig farms of 10,000 pigs for sale in a family near, adopt livestock and poultry cultivation sewage to be used for the method for producing fodder additives and being cleaned into water, sewage purification Cheng Zhongshui and reuse, produce the little algae feedstuff additive of fine simultaneously, referring to Fig. 1.
The about 100m of average generation every day of the liquid dung of flushing pigsty and pig excretory urine
3High concentration organic sewage, its water quality condition is seen Fig. 2, and the zinc of sewage and copper content is respectively up to 28.64mg/L and 16.86mg/L.After these sewage import the bilge main on pig farm, after removing than mechanical impuritys such as big floating matters, grid enters 100m
3The acidifying equalizing tank, regulate the sewage water yield, water quality, pH value, add the part active sludge slurry of the 1st lattice generation of 4 lattice tandem methane-generating pits at the rear portion of acidifying equalizing tank, the long-chain in the sewage, larger molecular organics are decomposed into short chain, small organic molecule, improve the biodegradability of sewage.With solid-liquid separating machine the excrement slag is separated from sewage then and made compost, and the sewage after acidification enters 400m
3Buried methane-generating pit in, the anaerobic biological that carries out about 4 days is handled.The collecting methane that methane-generating pit produces is used for the hot water boiler manufacture hot water methane-generating pit, bioreactor etc. is incubated to gas holder.The natural pond liquid water quality condition that methane-generating pit produces is seen Fig. 2, and the zinc of natural pond liquid and copper content are still respectively up to 9.25mg/L and 5.79mg/L.Natural pond liquid is joined 600m again
3The active sludge aeration tank in carry out aerobic biochemical and handle, further reduce BOD, the COD of natural pond liquid, and ammonia nitrogen be converted into nitrate or the nitrite that is absorbed by little algae easily, eliminate the peculiar smell of natural pond liquid simultaneously.
Natural pond liquid after aerobic biochemical is handled is through 25m
3The vertical sedimentation basin post precipitation, mud slurry is collected in the mud storage pond, after the plate-and-frame filter press press filtration, filtrate turns back to methane-generating pit continues to handle, and mud can be done compost treatment.It is 100m that the supernatant liquid of settling tank enters a day processing water yield
3Membrane bioreactor do further aerobic treatment, when sewage saw through the aperture and is the hollow-fibre membrane of 0.03～0.2 μ m, bacterium and most fine suspended substance all were retained down, for next step foster algae denitrogenation dephosphorizing has been created basic condition.The mud that membrane bioreactor produces is discharged into settling tank for per 6 months 1 time or replenishes and is the active sludge of aerobic biochemical reactor.The ultrafiltration clear liquid water quality condition that membrane bioreactor produces is seen Fig. 2, and zinc and copper content are respectively 2.94mg/L and 1.74mg/L.The ultrafiltration clear liquid is collected in 100m
3Disinfecting tank in, add clorox and carry out disinfection, kill wherein germ and harmful organisms, add in the Sulfothiorine then and thimerosal, cultivate main nitrogenous source and phosphorus source as little algae.Ultrafiltration clear liquid after the sterilization is by one-period cyclical operation in 6 days, to 6 100m
3Bioreactor, only join wherein 1 successively every day, this reactor for the inventor applied for patent of invention the aeration type bioreactor (aeration type bioreactor and application method thereof. Chinese invention patent, application number: 200910047898.7).Then, in the aeration type bioreactor, insert scenedesmus obliquus algae kind, press 3g/m
3Concentration add ironic citrate, press 0.13g/m
3Concentration add VITMAIN B1, and feed the CO 2 waste gas that biogas burning back produces, carry out the little algae of closed smooth autotrophy high-density breeding, absorb heavy metal elements such as nitrogen phosphorus in the nutrient solution and zinc, copper simultaneously with scenedesmus obliquus.Foster algae is discharged algae liquid and enters into 25m from bioreactor after 6 days
3Flocculation sedimentation tank in, after in the pond, adding flocculate with chitosan scenedesmus obliquus and sedimentation, upper clear supernate is collected in the middle pond, water quality reaches " urban sewage reutilization water for scenic environment use water quality standard " (GB/T 18921-2002), see Fig. 2, far above " livestock and poultry breeding industry pollutant emission standard " (GB 18596-2001), and the zinc of middle water and copper content have dropped to very low-level, be respectively 0.26mg/L and 0.11mg/L, both can be used as the middle water that washes pigsty, also can be used as pig farm greening landscape water.
Enter the pocket type microfroc filter after the effusive concentrated algae liquid in flocculation sedimentation tank bottom pumps up, be used as the middle water of flushing pigsty during the filtrate that filters out also is collected in the pond, isolated scenedesmus obliquus slurry (water ratio about 95%) not drying directly joins 3m
3Fermentation/enzymatic vessel in, and then add activated lactobacillus, Candida utilis, genus bacillus bacterial classification and cellulase, proteolytic enzyme, lipase prozyme simultaneously.Scenedesmus obliquus is through fermentation/enzymolysis after 24 hours, the ratio of amino acid, oligopeptides (2～3 amino acid) and polypeptide (10～51 amino acid), unsaturated fatty acids, little polysaccharides isoreactivity material significantly rises, become fine scenedesmus obliquus fodder additives, its nutritive ingredient is seen Fig. 3.The scenedesmus obliquus fodder additives added with the conventional pig feed that does not add heavy metal elements such as zinc, copper mix in the proportioning machine, be mixed with daily ration and feed pigs.Fermentation/enzymolysis of little algae has significantly improved the absorption rate of live pig to various nutritive substances and physiologically active substance in little algae, both strengthened live pig to protein, fat, starch, the picked-up of the unsaturated fatty acids that is rich in particularly little algae, improved the immunizing power of live pig because of the physiologically active substance that has absorbed simultaneously in little algae again, thereby few with, even do not use antibiotic etc, the final pork quality that improves reduces the pig feed cost, and the realization green ecological is raised pigs.
Claims (10)
1. livestock and poultry cultivation sewage is used for the method for producing fodder additives and being cleaned into water, it is characterized in that may further comprise the steps:
1), livestock and poultry cultivation anerobic sowage-aerobic treatment
After liquid dung that a, flushing livestock and poultry colony house produce and livestock and poultry excretory urine import the bilge main of livestock and poultry farm, after removing than mechanical impuritys such as big floating matters, grid enters the acidifying equalizing tank, regulate the sewage water yield, water quality, pH value, add the anterior part active sludge slurry that produces of follow-up anaerobic biochemical reactor at the rear portion of acidifying equalizing tank, long-chain in the sewage, larger molecular organics are decomposed into short chain, small organic molecule, improve the biodegradability of livestock and poultry cultivation sewage;
B, with solid-liquid separating machine the excrement slag is separated from sewage and to be made compost, the sewage after acidification enters and carries out anaerobic biological in the anaerobic biochemical reactor and handle, and the collecting methane that produces in the anaerobic biochemical reactor is to gas holder;
C, anaerobic biochemical reactor is handled natural pond liquid that the back produces join and carry out aerobic biochemical in the aerobic biochemical reactor and handle, further reduce BOD, the COD of natural pond liquid, and the ammonia nitrogen in the liquid of natural pond is converted into nitrate or the nitrite that is absorbed by little algae easily, eliminate the peculiar smell of natural pond liquid simultaneously;
2), natural pond liquid is cleaned into middle water with membrane bioreactor, bioreactor
A, the natural pond liquid after aerobic biochemical is handled enter the settling tank precipitation, and the mud slurry of bottom is collected in the mud storage pond, can make compost with the mud after the plate-and-frame filter press press filtration, and filtrate turns back to anaerobic biochemical reactor and continues to handle;
Supernatant liquid in b, the settling tank enters membrane bioreactor and does further aerobic treatment, and the ultrafiltration membrance filter in membrane bioreactor removes various fine suspended substances and bacterium, and the mud that membrane bioreactor produces regularly discharges back settling tank or adds to the aerobic biochemical reactor makes active sludge;
The ultrafiltration clear liquid that c, the ultrafiltration membrance filter in membrane bioreactor produce is collected in the sterilization pool, add the sterilizing agent sterilization, add then in the neutralizing agent with behind the thimerosal and enter into bioreactor as main nitrogenous source and the phosphorus source of little algae cultivation, in bioreactor, add algae kind and a small amount of necessary nutritive salt, and the CO 2 waste gas of feeding biogas burning back generation, carry out the little algae of closed smooth autotrophy high-density breeding, absorb heavy metal elements such as nitrogen phosphorus in the nutrient solution and zinc, copper simultaneously with little algae;
D, through micro algae growth week after date from bioreactor, discharges algae liquid and enters into flocculation sedimentation tank, in the pond, add the flocculation agent precipitation, upper clear supernate is collected in the middle pond and is used as reuse water;
3), produce fodder additives and prepare livestock and poultry diet with little algae
A, after the effusive concentrated algae liquid in flocculation sedimentation tank bottom pumps up, enter filter, be used as reuse water in the pond during the filtrate that filters out also is collected in;
B, directly enter fermentation/enzymatic vessel (pond) through the isolated little algae slurry of filter, add activated bacterial classification and prozyme ferment/enzymolysis after, become the little algae feedstuff additive of fine;
C, little algae feedstuff additive added with the livestock and poultry conventional feed that does not add heavy metal elements such as zinc, copper mix in the proportioning machine, be mixed with livestock and poultry diet.
2.1, ( UASB ) ( IC ) ( EGSB ) ( EC ) ( USR ) ( ABR ) - ( UBF ) ( AF ) ( AHR ) ( ASBR ) ( AEBR ) ( AFBR ) ( ARBC ) ( UFB Biobed ) ( AF+UASB ) 。
3. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described aerobic biochemical reactor can adopt active sludge aeration tank or BAF or aerobic biofilter or biological contact oxidation pond or oxidation ditch or oxidation pond or CASS aerobic biochemical pond or sbr reactor pond or aerobic biological fluid-bed or drip filter bed or aerobe rotating disk.
4. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described membrane bioreactor can adopt polymeric membrane bio-reactor or ceramic membrane bioreactor.
5. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described bioreactor is for can adopt duct type bioreactor or flat bioreactor or column airlift photobioreactor or vertical Pig or closed shallow annular pond.
6. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described sterilizing agent is clorox or ozone or dioxide peroxide or ultraviolet ray, and described neutralizing agent adopts Sulfothiorine.
7. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described little algae chooses green alga or chrysophyceae or diatom or blue-green algae or the red algae in the freshwater microalgae, can adopt to contain the high chlorella of protein or scenedesmus obliquus or spirulina.
8. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described flocculation agent is microbial flocculant or the natural macromolecule flocculating agent harmless to livestock and poultry, can adopt chitosan flocculant.
9. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described bacterial classification can adopt lactobacillus or Candida utilis or genus bacillus.
10. livestock and poultry cultivation sewage as claimed in claim 1 is used for the method for producing fodder additives and being cleaned into water, it is characterized in that described prozyme can adopt cellulase or proteolytic enzyme or lipase prozyme.
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| CN2011100066359A CN102161550B (en) | 2011-01-13 | 2011-01-13 | Method for producing feed additive from livestock and poultry breeding wastewater and purifying breeding wastewater to reclaimed water |
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