CN108727098A - The method for preparing fertilizer using pig breeding wastewater - Google Patents

The method for preparing fertilizer using pig breeding wastewater Download PDF

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Publication number
CN108727098A
CN108727098A CN201810396772.XA CN201810396772A CN108727098A CN 108727098 A CN108727098 A CN 108727098A CN 201810396772 A CN201810396772 A CN 201810396772A CN 108727098 A CN108727098 A CN 108727098A
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fertilizer
breeding wastewater
sludge
fermentation
guanite
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沈建军
陈立平
沈昕
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Zhejiang Jinhua Uruwu Two Heads Industry Development Co Ltd
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Zhejiang Jinhua Uruwu Two Heads Industry Development Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05GMIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00Phosphorus; Compounds thereof
    • C01B25/16Oxyacids of phosphorus; Salts thereof
    • C01B25/26Phosphates
    • C01B25/45Phosphates containing plural metal, or metal and ammonium
    • C01B25/451Phosphates containing plural metal, or metal and ammonium containing metal and ammonium
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C05FERTILISERS; MANUFACTURE THEREOF
    • C05BPHOSPHATIC FERTILISERS
    • C05B9/00Fertilisers based essentially on phosphates or double phosphates of magnesium
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/20Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses the method for preparing fertilizer using pig breeding wastewater, specific method is:Pig breeding wastewater is discharged into sedimentation basin, MgCl is added2And Na3PO4, menthol is added, pH is adjusted, after guanite precipitates, natural separation obtains guanite precipitation and tail water;Tail water is discharged into methane-generating pit, seed sludge, fermentation carries out reverse osmosis concentrate and clear water, by sludge press filtration after biogas slurry filtering;Sludge after concentrate and press filtration is uniformly mixed, fermenting agent fermentation is added, guanite, tourmaline powder and compound sodium nitrophenolate are added after fermentation, machine is granulated to get organic-inorganic composite fertilizer after mixing.It has the beneficial effect that:Preparation method of the present invention can convert waste water in the fertilizer and the energy of tool commercial value, nitrogen, the rate of recovery of phosphor resource are high, and fertilizer obtained has both the performance of organic fertilizer and inorganic fertilizer, and the preparation method makes the yield of guanite and purity high, the yield of biogas is also higher, improves resource utilization.

Description

The method for preparing fertilizer using pig breeding wastewater
Technical field
The present invention relates to pig cultural technique fields, more particularly to the method for preparing fertilizer using pig breeding wastewater.
Background technology
So far from 2007, China optimizes productive structure of animal husbandry, and China's pig-breeding industry is grown rapidly, by Gradually raised from small-scale, casual household to scale, intensive culture development.These large-scale plant that raises because with the culture-cycle it is short, At low cost, the advantages that being easily managed and have been favored by people, but they also bring many problems accordingly.Along with cultivation Industry scale is growing, pig farm generate waste the pollution of environment is also come it is bigger, wherein representative is useless The foul smell problem generated in water pollution, poultry excrement and urine disposal and breeding process.Wherein, livestock breeding wastewater is because discharge capacity is big, place Reason difficulty is big and is increasingly becoming focus of people's attention.Wastewater from Pig Farm pollution essentially from the urine that generates in the process of pig raising and The sewage for rinsing pig house, belongs to high concentrated organic wastewater, and the COD (CODcr) of waste water is up to 5000~20000mg/L, ammonia Nitrogen (NH3-N) is 600~1600mg/L, and phosphorus concentration carries a large amount of pathogens up to 100~250mg/L, is distributed extremely dense smelly Taste also contains the substances such as a large amount of organic matter, suspended matter, heavy metal and remaining veterinary drug in sewage, therefore, if Pig raising wastewater is straight Run in into natural water, easily cause body eutrophication, to destroy water body environment.So livestock breeding wastewater is before discharging It needs to be effectively treated, serious environmental pollution otherwise can be caused to environment, or even threaten local ecological safety.Therefore, Livestock breeding wastewater is concentrated and effectively handling is very important.
Currently, the treatment technology in relation to Pig raising wastewater can substantially be divided into 3 major class both at home and abroad:(1)Source control technology, it is such as raw Object deep-litter systems;(2)Tail end wastewater treatment technology uses at physical chemistry and biological method Pig raising wastewater Reason, is discharged after up to standard or recycling reuse utilizes;(3)Application technology as the second resource directly carries out the Pig raising wastewater of high concentration Resource utilization and utilization technology, piggery wastewater are a kind of fertilizer energy, contain the plant nutrients such as a large amount of nitrogen, phosphorus member in waste water Element is used for field irrigation after processing is up to standard, can effectively improve soil fertility, improves soil structure.Therefore how by aquaculture Waste water efficiently uses, and does not cause environmental pollution, becomes the new approaches of processing Wastewater from Pig Farm.
The prior art such as Authorization Notice No. is the Chinese invention patent of CN105110523B, and it is useless to disclose a kind of livestock and poultry cultivation The utilization of resources of water and processing method, include the following steps:(1)Anaerobic digestion methane production;(2)Slagging-off;(3)Biological aerated filter It is biochemical;(4)Disinfection;(5)Organic fertilizer manufactures.Above-mentioned processing method is based on anaerobic digestion methane production technology, BAF technologies, disinfection skill Art is combined, and using livestock breeding wastewater as resource, it is handled by anaerobic fermentation, produces biogas, produces the waste water after biogas Again through being separated by solid-liquid separation, solid slag is used for the raw material as production organic fertilizer, produces organic fertilizer, waste water is using BAF technologies With recycled after disinfection and qualified discharge, high treating effect, low energy consumption, and comprehensive utilization resource has economic benefit simultaneously.But It is that the processing method directly carries out fermentation process to breeding wastewater, it is relatively low to dissolubility nitrogen, the removal rate of phosphorus in breeding wastewater, Nitrogen, the rate of recovery of phosphor resource be not high.
Invention content
The purpose of the present invention is to provide a kind of method preparing fertilizer using pig breeding wastewater, which can will give up Water is converted into the fertilizer and the energy of tool commercial value, and nitrogen, the rate of recovery of phosphor resource are high, and fertilizer obtained has both organic fertilizer and nothing The performance of machine fertilizer, and the preparation method makes the yield of guanite and purity high, the yield of biogas is also higher, and improving resource makes With rate.
The present invention in view of the above technology in the problem of mentioning, the technical solution taken is:
The method for preparing fertilizer using pig breeding wastewater, including breeding wastewater pretreatment, breeding wastewater fermentation, fertilizer preparation, tool Body method is:
Fermenting agent is purchased from Hangzhou snowy region Bioisystech Co., Ltd.
Breeding wastewater pre-processes:Pig breeding wastewater is discharged into sedimentation basin, measures NH in breeding wastewater4+、Mg2+And PO4 3-'s Concentration, with NH4+Removal rate reach 90% or more be standard, MgCl is added into pig breeding wastewater2And Na3PO4So that pig cultivates N (Mg) in waste water:n(P):N (N) is 1.1-1.2:0.9-1:1, menthol is added, the pH to 9.0- of waste water is adjusted with lye 10.0, occur guanite precipitation reaction, after natural separation obtain guanite precipitation and tail water, spare, above-mentioned menthol adds Dosage is MgCl2The 0.35-0.42 ‰ of weight, the weight ratio of levorotatory menthol and dextrorotation menthol is 100 in menthol: The addition of 2.64-4.56, the menthol can make NH4+、Mg2+And PO4 3-It is quickly in hypersaturated state, it is heavy to quickly form guanite It forms sediment, improves NH in breeding wastewater4+、Mg2+And PO4 3-Removal rate, while when pH value is slightly higher, the addition of the menthol is avoided that The generation of other side reactions generates the Mg for being less readily soluble in water3(PO4)2With Mg (OH)2Precipitation etc. influences the yield of guanite and pure Degree, the characteristics of guanite precipitation method have both denitrogenation of waste water dephosphorization and resource utilization nitrogen Agencies, when having Mg, phosphorus in waste water or solution In the presence of three kinds of acid, ammonium ions, and ion concentration product is more than MgNH4PO4·6H2Guanite precipitation occurs for O solubility product constants anti- Answer, generate guanite, guanite is soluble in acid, does not dissolve in alkali, water and ethanol solution, apply have behind farmland slow-release nitrogen, phosphorus spy Point is considered as extremely valuable agriculture slow-release fertilizer, and nitrogen and phosphorus element therein is slowly discharged into only earth, and plant is promoted to have Effect absorbs, and the removal effect of ammonia nitrogen is preferable in addition, and phosphorus residual quantity is relatively low, and the guanite precipitated product of generation has well Settling property, be easily isolated, and recycle guanite be not required to wash;
Breeding wastewater ferments:Tail water is discharged into methane-generating pit, seed sludge adjusts pH, ferments in methane-generating pit, natural pond is obtained behind natural pond processed The pH value of biogas slurry is adjusted to pump into activated carbon filtering tank after neutrality and be filtered, can reduce the oxidation of biogas slurry by gas, biogas slurry and sludge Reduction potential, it is then reverse osmosis to obtain concentrate and clear water, while sludge is through sludge filter press press filtration, it is spare, above-mentioned inoculation Fe containing sludge weight 0.36-0.46% in sludge3O4The 4- aminobenzenesulfonic acids of nano-particle and sludge weight 0.13-0.18% Sodium, Fe in the sludge3O4Nano-particle and 4- Sodium p-aminobenzene sulfonats cooperate, and play synergistic effect, may participate in the life of methane backeria The synthesis and activation of key enzyme, make the dominant bacteria of methanogen floras in system change in long proliferation and the outer metabolic response of intracellular Become and improve microbial metabolic activity, and then improve anaerobic system operational efficiency, while Fe3O4Nano-particle and 4- amino phenyl sulfonyls The addition of sour sodium can also improve the activity of hydrogenogen, so that fermentation energy is quickly entered production hydroformylation stage, improve hydrogen and carbon dioxide Deng yield, save fermentation time, while improving the yield of biogas, still contain a large amount of organic and inorganic dirt after precipitation in tail water Object is contaminated, COD, TOC, TC concentration are still very high, and especially dissolubility organic pollution is almost without being removed, so still needing to heavy Tail water behind shallow lake is further handled, by under anaerobic bacteria, the absorption of facultative aerobe, fermentation, methane phase collective effect in methane-generating pit Organic matter is resolved into methane and carbon dioxide, the B/C values of waste water are improved by Anaerobic Treatment, improve the biodegradability of waste water, The methane and carbon dioxide of generation collects to obtain biogas by gas collector, and anaerobic fermentation power consumption is few, processing cost is low, And the biogas generated is used as energy substance, generates economic benefit, while i.e. recoverable after clear water sterilizing, saves Water resource;
It is prepared by fertilizer:Sludge after concentrate that fermentation step obtains and press filtration is uniformly mixed, material gross weight 0.3-1.2% is added Fermenting agent, carry out fermentation process, guanite, tourmaline powder and compound nitrophenol be added after fermentation ends into fermenting mixture Sodium is granulated to get organic-inorganic composite fertilizer through comminutor after mixing, which has both organic fertilizer and inorganic The performance of fertilizer, have utilization rate height, good absorbing, nutrient is complete, fertilizer efficiency is long, work clay fertilizer the features such as, production cost is low, user Just, it while meeting the full nutrition needed for plant growth, is used for a long time and also has the effect of improving the soil ground living, the Fashion of Future agricultural The developing direction of production fertilizer is suitble to industrial crops and cereal crops producing region large area to use, while the nitrogen phosphorus in compound fertilizer Nutrient can be slowly released into only earth, promoted plant effectively to absorb, to improve crop yield, while being improved farming Article matter.
Preferably, the biogas collected in breeding wastewater fermentation can be used as the energy after dehydration, desulfurization process.
Preferably, fermenting agent is bacillus subtilis or aspergillus niger or fission yeast in fertilizer preparation process, have Imitate total viable count >=5 × 109cfu/mL。
Preferably, the ingredient of fertilizer and its parts by weight are in fertilizer preparation process:50-70 parts of fermenting mixture, birds droppings 15-25 parts of stone, 2-3 parts of tourmaline powder, 0.1-0.2 parts of compound sodium nitrophenolate.Tourmaline is that a kind of boracic carries additional anionic Cyclic silicate salt mineral, main chemical compositions SiO2、FeO、Fe2O3Deng the crystal structure of mineral is extremely complex, generally Think that its basic unit is mainly oxygen-octahedron (SiO4) multiple tripartite's ring, tourmaline have it is permanent it is radiation infrared, The characteristics such as anion and bioelectricity are discharged, and are rich in ten several trace elements such as iron, selenium, cobalt necessary to crop growth, this Outdoor electrical stone can stabilize and increase, the physics function of balanced soil.
Compared with the prior art, the advantages of the present invention are as follows:1)Preparation method of the present invention converts waste water to tool business valence The fertilizer and the energy of value realize that animal farm wastewater zero-emission, energy-saving and environmental protection truly solve Large-scale pig farm ring The bottleneck of guarantor's problem optimizes the internal structure of the ecosystem, enhances substance cycle and energy stream in eco-agricuhure system It is dynamic, it is suitble to large quantities of utilization and extentions in livestock and poultry farm;2)Fertilizer of the present invention has both the performance of organic fertilizer and inorganic fertilizer, tool Have that utilization rate height, good absorbing, nutrient is complete, fertilizer efficiency is long, clay fertilizer living the features such as, production cost is low, easy to use, the nitrogen in fertilizer Phosphorus nutrition element can be slowly released into only earth, and plant is promoted effectively to absorb;3)The guanite precipitation method that the present invention uses make The removal effect for obtaining ammonia nitrogen is preferable, and phosphorus residual quantity is relatively low, and is avoided that the generation of other side reactions, and guanite is made to precipitate Yield and purity are higher;4)The sludge that the fermentation process of use uses can improve anaerobic system operational efficiency, while can also improve The activity of hydrogenogen makes fermentation energy quickly enter production hydroformylation stage, improves the yield of hydrogen and carbon dioxide etc., when saving fermentation Between, while improving the yield of biogas.
Specific implementation mode
The present invention program is described further below by embodiment:
Embodiment 1:
The method for preparing fertilizer using pig breeding wastewater, including breeding wastewater pretreatment, breeding wastewater fermentation, fertilizer preparation, tool Body method is:
1)Breeding wastewater pre-processes:Pig breeding wastewater is discharged into sedimentation basin, measures NH in breeding wastewater4+、Mg2+And PO4 3-It is dense Degree, with NH4+Removal rate reach 90% or more be standard, MgCl is added into pig breeding wastewater2And Na3PO4So that pig cultivation is useless N (Mg) in water:n(P):N (N) is 1.1:1:1, menthol is added, the pH to 9.0 of waste water, guanite precipitation are adjusted with lye Afterwards, natural separation obtains guanite precipitation and tail water, spare, above-mentioned guanite(Guanite)The additive amount of menthol in settling step For MgCl2The 0.42 ‰ of weight, the weight ratio of levorotatory menthol and dextrorotation menthol is 100 in menthol:2.64, the menthol Addition can make NH4+、Mg2+And PO4 3-It is quickly in hypersaturated state, guanite precipitation is quickly formed, improves in breeding wastewater NH4+、Mg2+And PO4 3-Removal rate, while when pH value is slightly higher, the addition of the menthol is avoided that the generation of other side reactions, Generate the Mg for being less readily soluble in water3(PO4)2With Mg (OH)2Precipitation etc., influences the yield of guanite, the guanite precipitation method have both waste water Denitrogenation dephosphorizing and the characteristics of resource utilization nitrogen Agencies, in the presence of having three kinds of Mg, phosphoric acid, ammonium ions in waste water or solution, and from Sub- concentration product is more than MgNH4PO4·6H2Guanite precipitation reaction occurs for O solubility product constants, generates guanite, and guanite is readily soluble In acid, alkali, water and ethanol solution are not dissolved in, has the characteristics of slow-release nitrogen, phosphorus after applying farmland, is considered as extremely valuable agricultural Slow-release fertilizer, nitrogen and phosphorus element therein are slowly discharged into only earth, and plant is promoted effectively to absorb, in addition the removal effect of ammonia nitrogen Fruit is preferable, and phosphorus residual quantity is relatively low, and the guanite precipitated product of generation has good settling property, is easily isolated, and The guanite of recycling is not required to wash overflow;
2)Breeding wastewater ferments:Tail water is discharged into methane-generating pit, seed sludge adjusts pH, ferments in methane-generating pit, obtained behind natural pond processed The pH value of biogas slurry is adjusted to pump into activated carbon filtering tank after neutrality and be filtered, can reduce the oxygen of biogas slurry by biogas, biogas slurry and sludge Change reduction potential, it is then reverse osmosis to obtain concentrate and clear water, while sludge is through sludge filter press press filtration, spare, above-mentioned fermentation Fe containing sludge weight 0.46% in the sludge being inoculated in step3O4The 4- amino phenyl sulfonyls of nano-particle and sludge weight 0.13% Sour sodium, Fe in the sludge3O4Nano-particle and 4- Sodium p-aminobenzene sulfonats cooperate, and play synergistic effect, may participate in methane backeria The synthesis and activation of key enzyme, make the dominant bacteria of methanogen floras in system occur in growing multiplication and the outer metabolic response of intracellular Change and improve microbial metabolic activity, and then improve anaerobic system operational efficiency, while Fe3O4Nano-particle and 4- aminobenzenes The addition of sodium sulfonate can also improve the activity of hydrogenogen, so that fermentation energy is quickly entered production hydroformylation stage, improve hydrogen and titanium dioxide The yield of carbon etc. saves fermentation time, while improving the yield of biogas, still containing a large amount of organic and inorganic in tail water after precipitation Pollutant, COD, TOC, TC concentration are still very high, and especially dissolubility organic pollution is almost without being removed, so still needing to pair Tail water after precipitation is further handled, by anaerobic bacteria, the absorption of facultative aerobe, fermentation, methane phase collective effect in methane-generating pit It is lower that organic matter is resolved into methane and carbon dioxide, the B/C values of waste water are improved by Anaerobic Treatment, improve the biochemical of waste water Property, the methane and carbon dioxide of generation collect to obtain biogas by gas collector, and anaerobic fermentation power consumption is few, processing cost It is low, and the biogas generated is used as energy substance, generates economic benefit, while i.e. recoverable after clear water sterilizing, Water resource is saved, the biogas of collection can be used as the energy after dehydration, desulfurization process;
3)It is prepared by fertilizer:Sludge after concentrate that fermentation step obtains and press filtration is uniformly mixed, material gross weight 1.2% is added Bacillus subtilis carries out fermentation process, guanite, tourmaline powder and compound nitrophenol is added into fermenting mixture after fermentation ends Sodium is granulated to get organic-inorganic composite fertilizer through comminutor after mixing, and the ingredient and its parts by weight of above-mentioned fertilizer are:Fermentation is mixed 50 parts of object, 25 parts of guanite, 2 parts of tourmaline powder, 0.2 part of compound sodium nitrophenolate are closed, which has both organic fertilizer and nothing The performance of machine fertilizer, has that utilization rate height, good absorbing, nutrient is complete, fertilizer efficiency is long, clay fertilizer living the features such as, production cost is low, use It is convenient, while meeting the full nutrition needed for plant growth, it is used for a long time and also has the effect of improving the soil ground living, the Fashion of Future agriculture The developing direction of industry production fertilizer is suitble to industrial crops and cereal crops producing region large area to use, while the nitrogen in compound fertilizer Phosphorus nutrition element can be slowly released into only earth, promoted plant effectively to absorb, to improve crop yield, while being improved agriculture Crop quality.
Embodiment 2:
The method for preparing fertilizer using pig breeding wastewater, including breeding wastewater pretreatment, breeding wastewater fermentation, fertilizer preparation, tool Body method is:
1)Breeding wastewater pre-processes:Pig breeding wastewater is discharged into sedimentation basin, measures NH in breeding wastewater4+、Mg2+And PO4 3-It is dense Degree, with NH4+Removal rate reach 90% or more be standard, MgCl is added into pig breeding wastewater2And Na3PO4So that pig cultivation is useless N (Mg) in water:n(P):N (N) is 1.2:0.9:1, menthol is added, the pH to 10.0 of waste water is adjusted with lye, guanite is heavy Behind shallow lake, natural separation obtains guanite precipitation and tail water, spare, above-mentioned guanite(Guanite)The addition of menthol in settling step Amount is MgCl2The 0.35 ‰ of weight, the weight ratio of levorotatory menthol and dextrorotation menthol is 100 in menthol:4.56;
2)Breeding wastewater ferments:Tail water is discharged into methane-generating pit, seed sludge adjusts pH, ferments in methane-generating pit, obtained behind natural pond processed The pH value of biogas slurry is adjusted to pump into activated carbon filtering tank after neutrality and be filtered, can reduce the oxygen of biogas slurry by biogas, biogas slurry and sludge Change reduction potential, it is then reverse osmosis to obtain concentrate and clear water, while sludge is through sludge filter press press filtration, spare, above-mentioned fermentation Fe containing sludge weight 0.36% in the sludge being inoculated in step3O4The 4- amino phenyl sulfonyls of nano-particle and sludge weight 0.18% The biogas of sour sodium, collection can be used as the energy after dehydration, desulfurization process;
3)It is prepared by fertilizer:Sludge after concentrate that fermentation step obtains and press filtration is uniformly mixed, material gross weight 0.5% is added Fermenting agent carries out fermentation process, guanite, tourmaline powder and compound sodium nitrophenolate is added into fermenting mixture after fermentation ends, It is granulated to get organic-inorganic composite fertilizer through comminutor after mixing, above-mentioned fermenting agent is that weight ratio is 1:0.8 aspergillus niger With fission yeast mixed fermenting agent, the ingredient and its parts by weight of fertilizer are:It is 70 parts of fermenting mixture, 16 parts of guanite, electrical 2.8 parts of mountain flour, 0.12 part of compound sodium nitrophenolate.
Embodiment 3:
The method for preparing fertilizer using pig breeding wastewater, including breeding wastewater pretreatment, breeding wastewater fermentation, fertilizer preparation, tool Body method is:
1)Breeding wastewater pre-processes:Pig breeding wastewater is discharged into sedimentation basin, measures NH in breeding wastewater4+、Mg2+And PO4 3-It is dense Degree, with NH4+Removal rate reach 90% or more be standard, MgCl is added into pig breeding wastewater2And Na3PO4So that pig cultivation is useless N (Mg) in water:n(P):N (N) is 1.15:0.95:1, menthol is added, the pH to 9.5 of waste water, guanite are adjusted with lye After precipitation, natural separation obtains guanite precipitation and tail water, spare, above-mentioned guanite(Guanite)Menthol adds in settling step Dosage is MgCl2The 0.38 ‰ of weight, the weight ratio of levorotatory menthol and dextrorotation menthol is 100 in menthol:3.0;
2)Breeding wastewater ferments:Tail water is discharged into methane-generating pit, seed sludge adjusts pH, ferments in methane-generating pit, obtained behind natural pond processed The pH value of biogas slurry is adjusted to pump into activated carbon filtering tank after neutrality and be filtered, can reduce the oxygen of biogas slurry by biogas, biogas slurry and sludge Change reduction potential, it is then reverse osmosis to obtain concentrate and clear water, while sludge is through sludge filter press press filtration, spare, above-mentioned fermentation Fe containing sludge weight 0.36-0.46% in the sludge being inoculated in step3O4The 4- amino of nano-particle and sludge weight 0.15% Benzene sulfonic acid sodium salt;
3)It is prepared by fertilizer:Sludge after concentrate that fermentation step obtains and press filtration is uniformly mixed, material gross weight 0.8% is added Fermenting agent carries out fermentation process, guanite, tourmaline powder and compound sodium nitrophenolate is added into fermenting mixture after fermentation ends, It is granulated to get organic-inorganic composite fertilizer through comminutor after mixing, above-mentioned fermenting agent is that weight ratio is 1:1:1 withered grass bud Spore bacillus, aspergillus niger and fission yeast mixed fermenting agent, the ingredient and its parts by weight of fertilizer are:60 parts of fermenting mixture, bird 20 parts of coprolite, 2.5 parts of tourmaline powder, 0.15 part of compound sodium nitrophenolate.
Routine operation in the operating procedure of the present invention is well known to those skilled in the art, herein without repeating.
Technical scheme of the present invention is described in detail in embodiment described above, it should be understood that the above is only For specific embodiments of the present invention, it is not intended to restrict the invention, all any modifications made in the spirit of the present invention, Supplement or similar fashion replacement etc., should all be included in the protection scope of the present invention.

Claims (9)

1. the method for preparing fertilizer using pig breeding wastewater, including breeding wastewater pretreatment, breeding wastewater fermentation, fertilizer preparation, It is characterized in that:The breeding wastewater fermentation step is:Tail water is discharged into methane-generating pit, seed sludge adjusts pH, in methane-generating pit It ferments, biogas, biogas slurry and sludge is obtained behind natural pond processed, the pH value of biogas slurry is adjusted to pump into activated carbon filtering tank after neutrality and is filtered, Then reverse osmosis to obtain concentrate and clear water, while sludge is through sludge filter press press filtration, it is spare, contain in the sludge of the inoculation Fe3O4Nano-particle and 4- Sodium p-aminobenzene sulfonats.
2. the method according to claim 1 for preparing fertilizer using pig breeding wastewater, it is characterised in that:The breeding wastewater Fe containing sludge weight 0.36-0.46% in the sludge being inoculated in fermentation step3O4Nano-particle and sludge weight 0.13- 0.18% 4- Sodium p-aminobenzene sulfonats.
3. the method according to claim 1 for preparing fertilizer using pig breeding wastewater, it is characterised in that:The breeding wastewater The biogas collected in fermentation step can be used as the energy after dehydration, desulfurization process.
4. the method according to claim 1 for preparing fertilizer using pig breeding wastewater, it is characterised in that:The breeding wastewater Pre-treatment step is:Pig breeding wastewater is discharged into sedimentation basin, measures NH in breeding wastewater4+、Mg2+And PO4 3-Concentration, with NH4+ Removal rate reach 90% or more be standard, MgCl is added into pig breeding wastewater2And Na3PO4, menthol is added, is adjusted useless The pH of water, occur guanite precipitation reaction, after natural separation obtain guanite precipitation and tail water, it is spare.
5. the method according to claim 4 for preparing fertilizer using pig breeding wastewater, it is characterised in that:The breeding wastewater N (Mg) in the waste water of guanite precipitation reaction in pre-treatment step:n(P):N (N) is 1.1-1.2:0.9-1:1, the pH tune of waste water To 9.0-10.0.
6. the method according to claim 4 for preparing fertilizer using pig breeding wastewater, it is characterised in that:The breeding wastewater The additive amount of menthol is MgCl in pre-treatment step2The 0.35-0.42 ‰ of weight, levorotatory menthol and the right side in the menthol The weight ratio for revolving menthol is 100:2.64-4.56.
7. the method according to claim 1 for preparing fertilizer using pig breeding wastewater, it is characterised in that:It is prepared by the fertilizer Step is:Sludge after concentrate that fermentation step obtains and press filtration is uniformly mixed, the fermentation of material gross weight 0.3-1.2% is added Microbial inoculum carries out fermentation process, guanite, tourmaline powder and compound sodium nitrophenolate, mixing is added into fermenting mixture after fermentation ends It is granulated to get organic-inorganic composite fertilizer by comminutor.
8. the method according to claim 7 for preparing fertilizer using pig breeding wastewater, it is characterised in that:It is prepared by the fertilizer Fermenting agent is bacillus subtilis or aspergillus niger or fission yeast, effective total viable count >=5 × 10 in step9cfu/mL。
9. the method according to claim 7 for preparing fertilizer using pig breeding wastewater, it is characterised in that:It is prepared by the fertilizer The ingredient of fertilizer and its parts by weight are in step:50-70 parts of fermenting mixture, 2-3 parts of tourmaline powder, is answered at 15-25 parts of guanite 0.1-0.2 parts of nitre phenol sodium.
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