CN117105457A - Odorless treatment method and application of pig manure water - Google Patents
Odorless treatment method and application of pig manure water Download PDFInfo
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- CN117105457A CN117105457A CN202311024456.7A CN202311024456A CN117105457A CN 117105457 A CN117105457 A CN 117105457A CN 202311024456 A CN202311024456 A CN 202311024456A CN 117105457 A CN117105457 A CN 117105457A
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention discloses a method for odorless recycling treatment of pig manure water and application thereof, which are used for solving the problems of malodor generation and recycling treatment in the pig manure water treatment process. A method for odorless treatment of pig manure water comprises the following steps: adding acid into a pig manure water tank to adjust the pH value to 3-4.5, adding acid-resistant functional bacteria, carrying out oxygen-enriched aeration odorless fermentation, and carrying out solid-liquid separation to obtain dry manure and urine water; the urine water is treated by a high-gradient magnetic strengthening primary anaerobic biological filter tank and a secondary gradient magnetic strengthening oxygen-enriched aeration biological filter tank, and the produced microbial flocs are mechanically dehydrated and then mixed with dry pig manure to prepare a small molecular organic water-soluble fertilizer, and the effluent water is disinfected for recycling flushing water. The invention also provides four applications, namely the method is used for treating cow urine water in a cattle farm, treating kitchen waste squeezed pulp water, treating kitchen waste centrifugally separated pulp water, and treating human excrement and urine water in a public toilet and a sewage septic tank.
Description
Technical Field
The invention belongs to the technical field of pig manure water resource utilization, and particularly relates to a pig manure water odorless resource treatment method and application.
Background
A main pushing technology for treating the excrement in pig farm features that a certain amount of water is injected into the water drain in culture house, and the excrement water, flushing water and raising management water are all discharged to the excrement ditch on gap floor for a certain period of time (1-2 months). The method has the advantages of heavy malodor, influence on the culture environment, high concentration of the pollutant in the fecal-water mixture, high subsequent treatment difficulty and high treatment cost.
The main pushing method of the dry pig manure process is that the dry pig manure is separated from urine once the manure is produced, the water content of the dry pig manure is adjusted to 50-65% after the dry pig manure is dehydrated to 80%, and the organic fertilizer is produced by aerobic composting for one month, so that the odor is very bad. Urine and sewage are subjected to anaerobic fermentation to produce biogas, biogas slurry and biogas residue, the biogas is used as a self-prepared energy source, the biogas residue is used for preparing organic fertilizer admixture, the biogas slurry is stored for a certain time and is used for being agricultural or is treated according to high-concentration organic wastewater to be discharged after reaching standards, the odor is heavy in the treatment process, the treatment time is long, the occupied area is large, and the treatment cost is high.
The disclosed patent is used for collecting the feces, urine and water which are sent together to a hydrolysis tank for treatment. The proportion of the dry pig manure to urine and water is 1:10-12, the manure, the urine and the water are not subjected to solid-liquid separation and enter a hydrolysis tank for chemical hydrolysis and are subjected to centrifugal separation after grinding. However, the hydrolysis tank and the grinder are large in devices and high in manufacturing cost. And then centrifugally separating, returning the centrifugal slag to hydrolyze, and making the centrifugate into water-soluble fertilizer by using a filter and an evaporation concentration unit, wherein the technology is advanced, mature and reliable, but a large amount of water is needed to be evaporated and concentrated, so that the energy consumption is high.
The traditional biological filter and ceramsite filter material purify sewage by formed biological membranes, and the biological membranes have small volume, small density, easy falling off and limited purification effect. When the operation period is reached and back flushing is needed, the biological film is easy to fall off, and the normal operation recovery time is long. The constant magnetic field adopted by the magnetic reinforcement is a magnetic plate type large in size and limited in magnetic field intensity. The traditional method adopts air aeration with low oxygen content (21%) to cause low dissolved oxygen, large blast volume and high energy consumption.
The magnetic reinforcement of the known test item is a constant magnetic field of a smooth permanent magnetic pole, and the generated magnetic force line has low density, low magnetic field strength, large volume of the permanent magnet and high manufacturing cost.
Disclosure of Invention
The invention aims to solve the problems of malodor and recycling treatment generated in the pig manure water treatment process, and provides a pig manure water odorless recycling treatment method and application.
The odorless treatment technology for fecal sewage provided by the invention comprises the steps of adding acidic functional bacteria into the fecal sewage and the urine water to adjust the pH value to 3-4.5, carrying out odorless fermentation treatment by utilizing molecular sieve oxygen-enriched aeration, and carrying out solid-liquid separation on the urine water by a first-stage high-gradient magnetic strengthening anaerobic biological filter tank and a second-stage high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank, wherein under the condition of the acidic pH value of 3-4.5, the microorganisms naturally existing in the urine water are subjected to acidic domestication, natural screening and the added acidic microorganisms are used for strengthening the acidic fermentation, so that the whole process has no odor. The source deodorization and the innovation superior to the rear end deodorization are achieved. The solid-liquid separated acidic dry pig manure is mixed with the microbial flocs separated by the primary and secondary biological filter tanks under the acidic condition, and the dehydrated acidic solid with water content of 80 percent is prepared into the small molecular organic water-soluble fertilizer which accords with various technical indexes of national relevant standards (such as national standard GB/T17419-2018 and the like) through acidic hydrolysis by utilizing the patent disclosed by the inventor. After the urine water is treated by the secondary anaerobic and oxygen-enriched aeration biological filter tank, the odorless slightly acidic water is treated by the secondary anaerobic and oxygen-enriched aeration biological filter tank, and the odorless slightly acidic water is recycled and used as flushing water, so that the deodorization of the whole process source is realized. Compared with the deodorization of the tail end after generating the odor, the deodorization of the whole process source saves a large amount of occupied area and investment, is an innovative whole process source deodorization method, and simultaneously realizes clean pig raising without malodor.
The high gradient magnetic field is realized by the high gradient magnetic pole, the volume of the permanent magnet is obviously reduced by two thirds compared with the constant magnetic field of the smooth magnetic pole, the magnetic field intensity is increased, the manufacturing cost is reduced, and the method is an innovation of a magnetic field strengthening method.
The traditional air aeration for sewage treatment has the oxygen content of 21%, the oxygen-enriched oxygen content manufactured by a molecular sieve oxygen enriching machine is 40-80%, the oxygen-enriched aeration amount is reduced by nearly 2-4 times compared with air, and the fan power and the electricity consumption are reduced by nearly 2-4 times. Is an innovation of the traditional sewage and urine treatment aeration method. The biochemical method adopted by the traditional urine water treatment is obviously superior to the biological membrane method of contact oxidation and the biological membrane method of an aeration biological filter tank. But the filter material ceramsite of the commonly adopted biological aerated filter is formed by high-temperature sintering, and the production cost is high. The microbial membrane formed by the ceramsite filter material is used for purifying urine and decomposing organic matters, and has the defects that the formation of the biological membrane is time-based, the biological membrane is slow, the biological membrane is easy to age and fall off, particularly the biological membrane is easier to fall off during back flushing, and the biological membrane can be slowly formed after a certain time is required to reduce the filtering speed during the recovery operation. The foamed plastic particles after crushing and screening are made into floating foamed plastic particle filtering material, so that the production cost is much lower than that of a ceramic particle filtering material, the porosity of the ceramic particle filtering material is 40%, the porosity of the foamed plastic particle filtering material is as high as 90-95%, the foamed plastic filtering material is hydrophobic filtering material, is not sticky to water and mud, forms microbial flocs among the foamed plastic gaps, does not form a biological film, contains more microorganisms, is equivalent to a microbial carrier, has an average volume of three times that of the biological film, has a density 2.5 times higher than that of the biological film, and has a purifying effect much better than that of the ceramic particle biological film. The method is particularly characterized in that the filtering speed is more than one time higher than that of the ceramsite, and the regeneration period is two times longer. The back flushing system is eliminated, and the upward water flowing head is lowered to loosen and pull the foamed plastic filtering material to separate microbial floc from water. The water head is washed for three times by up-and-down pulse oscillation, and the normal operation is recovered after 1-3 min. The biological flocs are formed quickly, the recovery time is short, waste foamed plastics are crushed and sieved to be used as filter materials to replace ceramsite filter materials, and the formed microbial flocs are used for replacing ceramsite biological membranes.
In the first aspect, the odorless treatment method for the pig manure water adopts the following technical scheme:
a method for odorless treatment of pig manure water comprises the following steps:
adding acid into a pig manure water tank to adjust the pH value to 3-4.5, adding acid functional bacteria into the pig manure water tank to perform odorless fermentation by using oxygen-enriched aeration generated by a molecular sieve oxygen-enriched machine, and performing solid-liquid separation to obtain dry pig manure and urine;
step (2), carrying out high-gradient magnetic strengthening primary anaerobic biological filter tank treatment on the urine water obtained in the step (1);
step (3), the effluent after the treatment of the high-gradient magnetic strengthening primary anaerobic biological filter tank in the step (2) is treated by a secondary high-gradient magnetic strengthening oxygen-enriched biological filter tank, and after the treated effluent is disinfected, the treated effluent is used for recycling flushing water;
and (4) mechanically dehydrating and mixing the dry pig manure obtained in the step (1), the high-gradient magnetic strengthening primary anaerobic biological filter tank in the step (2) and the microbial flocs generated in the high-gradient magnetic strengthening secondary oxygen-enriched aeration biological filter tank in the step (3) until the water content is less than or equal to 80 percent to prepare the small molecular organic water-soluble fertilizer.
By adopting the technical scheme, the pH value is adjusted to 3-4.5 by adding acid into the pig manure water tank, acid-resistant microorganisms are naturally screened by culture and domestication, acid-resistant functional microorganisms are added, the whole treatment process is odorless, the anaerobic fermentation is obviously superior to the anaerobic fermentation of the traditional method for 1-2 months, and the terminal deodorization is also superior. Malodorous gas is not generated in the whole process, and the cultivation environment is optimized.
The fermented pig manure water is subjected to solid-liquid separation, and microbial flocs produced by the same-level high-gradient magnetic strengthening anaerobic biological filter tank and the second-level high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank of the dry pig manure are mixed, and then the water content of the microbial flocs is mechanically dehydrated to be less than or equal to 80%, so that the small-molecule organic water-soluble fertilizer is prepared, the whole treatment period of the urine water treated by the high-gradient magnetic strengthening first-level anaerobic and second-level oxygen-enriched aeration biological filter tank is 7 hours, the whole production process is odorless, and compared with the anaerobic fermentation of one month or more and the production of malodor and other greenhouse gases by the traditional method, the treatment time is obviously shortened, the whole process is odorless, and the occupied area and the investment are greatly saved.
The urine water after solid-liquid separation is treated by a high gradient magnetic strengthening primary anaerobic filter tank and a secondary gradient magnetic strengthening oxygen-enriched aeration filter tank, and suspended substances SS and water-soluble solids, COD and BOD of the discharged water reach the reuse water which can be used for flushing of the sewage discharge standard of livestock and poultry raising industry.
The second-stage gradient magnetic strengthening biological filter tank treatment is superior to the traditional aeration biological filter tank treatment, the high-gradient magnetic strengthening treatment is adopted to strengthen the polarities of urine and water, the oxygen-enriched aeration is added to improve the dissolved oxygen amount, reduce the aeration amount by 70%, save electricity consumption by 60%, the natural acid-resistant microorganism and the functional microorganism added with secreted organic acid are enhanced in activity, the reproductive capacity is accelerated, the capability of decomposing the organic matters in urine and water is enhanced, the magnet volume is obviously reduced by 70% compared with the traditional constant magnetic field treatment of constant magnetic strengthening, the magnetic strengthening effect is enhanced, and the manufacturing cost is reduced.
Preferably, in the step (1), the acid functional bacteria are selected from one or more of yarrowia lipolytica CICC1664, aspergillus niger ACCC30160 and Alicyclobacillus stearothermophilus ACCC 10221T; the acidic functional bacteria are mixed and cultured in advance to form a liquid microbial inoculum, the effective viable count is 10-30 hundred million/mL, the addition amount is 1-5% of urine, and the fermentation time is 24-96h.
By adopting the technical scheme, natural acid-resistant bacteria are domesticated and screened, and organic acid-secreting functional bacteria are added so as to shorten the fermentation time, avoid malodor and facilitate subsequent biological treatment.
Preferably, in the step (2), the high gradient magnetic strengthening primary anaerobic biological filter tank is treated, the filtering speed is 1-5m/h, the hydraulic retention time is 1-4h, the regeneration period is 48-72h, and the BOD 5 The load is 3.0-5.5 kg/(kg.d).
Preferably, in the step (3), the secondary gradient magnetic strengthening oxygen-enriched aeration biological filter tank is treated, the filtering speed is 1-2m/h, the hydraulic retention time is 1-2.5h, the regeneration period is 48-96h, and the BOD 5 The load is 2.5-4.5 kg/(kg.d), 1kg BOD 5 The oxygen enrichment amount is 0.2-0.4kg.
Under the condition of adopting the technical scheme, the treatment parameters of the biological filter tank are controlled, so that the treatment efficiency is greatly improved, and the effluent reaches the technical index of the related recycled flushing water.
Further, the filter materials in the first-stage high-gradient magnetic strengthening anaerobic biological filter tank and the second-stage high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank are irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, and the porosity is 90-95%; the particle size of the filter material particles in the primary high-gradient magnetic reinforced anaerobic biological filter tank is 4-10mm, and the thickness is 1.0-2.6m; the particle size of the filter material particles in the secondary gradient magnetic reinforced oxygen-enriched aeration biological filter tank is 1-3mm, and the thickness is 1.0-2.6m.
By adopting the technical scheme, the porosity of the polystyrene foam plastic filter material is 90-95%, a biological film is not formed, microorganism flocs are formed, the concentration of adsorbed microorganisms is high, the formed flocs are large and firm due to the thrust generated by upward water flow between pores, the volume of the formed flocs is three times or more than that of the biological film, the density is two times or more, the number of microorganisms is three times more than that of the biological film, and the purification effect is good.
Preferably, the oxygen-enriched oxygen content of the molecular sieve oxygen-enriched biological filter tank is 40-80%, and the air-water ratio is (0.2-0.5): 1.0, the oxygen-enriched aeration dissolved oxygen amount is 8-10mg/L.
Preferably, when the first-stage high-gradient magnetic strengthening anaerobic biological filter tank and the second-stage high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank reach a regeneration period, forward flushing is adopted, the forward flushing adopts water head descending of upward flow in the tank, filter materials are naturally pulled and dispersed, the forward upward and downward pulse oscillation flushing time is 1-3min, and the flushing width is 0.5-1.0m.
By adopting the technical scheme, the upward water head is adopted to descend, the filter material is naturally dispersed, the microbial flocs in the filter material gap are large in density and size and sink into the floc hopper at the lower end of the filter tank rapidly, so that the separation of the microbial flocs and the filter material is realized, a back flushing system is not needed, a back flushing system is omitted, and the process is simplified and the investment is saved.
Preferably, the high gradient magnetic strengthening magnetic pole adopts a zigzag magnetic pole, the distance between two adjacent ends of the zigzag magnetic pole is 10-40mm, the central magnetic field strength is 1000-3000Gs, and the relative recovery permeability is 6.0-16.0 mu Tcc.
By adopting the technical scheme, the high gradient magnetic strengthening treatment is adopted, the high gradient magnetic field intensity is controlled, so that the polarities of urine and water are enhanced, the dissolved oxygen is increased, the aeration quantity can be reduced by 70 percent, the electricity consumption is saved by two thirds, the microbial activity of the organic acid secreted by the pig manure, the urine and the water is enhanced, the reproductive capacity is accelerated, and the capability of decomposing the organic matters in the urine and the water is enhanced.
The application of the odorless treatment method for the pig manure water adopts the following technical scheme:
the odorless treatment method of the pig manure water can also be used for treating the cattle manure water in a cattle farm, treating the squeezed pulp water of kitchen waste, treating the centrifugally separated pulp water of the kitchen waste, and treating the manure water in a public toilet and a sewage septic tank.
By adopting the technical scheme, the cattle water in the cattle farm is treated, the kitchen garbage is squeezed to obtain the pulp, the kitchen garbage is centrifugally separated to obtain the pulp, and the human excrement water in the public toilet and the sewage septic tank is treated, so that odorless recycling treatment is realized.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an application process of a method for odorless treatment of pig manure water.
Detailed Description
The method and application of the odorless treatment of pig manure water according to the invention will be described in further detail below with reference to fig. 1 and examples. For simplicity of description, this document does not exhaust all the alternative technical features and embodiments included in the present invention, so that those skilled in the art should understand that any technical features and embodiments in this example do not limit the scope of protection of the present invention, and this scope of protection includes any alternative technical features and embodiments that all those skilled in the art do not take into consideration. Specifically, any embodiment obtained by replacing any technical feature in the present invention or combining any two or more technical features provided by the present invention with each other shall fall within the scope of the present invention. The specific techniques and conditions are not identified in the examples, and the reagents or apparatus used, or the manufacturer is not identified in accordance with the techniques and conditions described in the literature in this field or in accordance with the product specifications, are conventional products commercially available.
Examples
Example 1
Example 1 provides a method for odorless treatment of pig manure water, and the process flow chart is shown in figure 1. The method comprises the following steps:
adding acid into a pig manure water tank of a pig farm to adjust the pH to 3.0, carrying out aeration fermentation for 62h, adding acid functional bacteria with the oxygen enrichment amount of 50% of the molecular sieve eutrophication machine yield, wherein the adding amount is 1% of the urine water, the aeration fermentation time is 62h, and the Aspergillus niger ACCC30160 has an effective viable count of 30 hundred million/mL. Solid-liquid separation is carried out to obtain dry manure and urine water, wherein the water content of the dry manure is 80%;
step (2), carrying out primary high-gradient magnetic strengthening anaerobic biological filtration tank treatment and secondary high-gradient magnetic strengthening oxygen-enriched aeration biological filtration tank treatment on the urine water obtained in the step (1), wherein the filter material is irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, the porosity is 95%, the particle size of the filter material particles is 10mm, the thickness is 1.8m, the filtration speed is 3.5m/h, the hydraulic retention time is 2.5h, and the BOD (biological oxygen-enriched aeration) 5 The load was 4.5 kg/(kg.d); the water head is lowered for flushing, the filter material is naturally dispersed, the up-down oscillation pulse flushing time is 1min, and the flushing width is 0.5m.
Step (3), the effluent from step (2) is subjected to secondary magnetic strengtheningThe oxygen-enriched aeration biological filter tank is treated, the filter material is irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, and the porosity is 95%; the particle size of the filter material particles in the primary magnetic reinforced biological filter tank is 2mm, and the thickness is 1.8m; the filtering speed of the primary magnetic reinforced biological anaerobic filter tank is 1m/h, the hydraulic retention time is 1.6h, and the BOD 5 The load is 3.5 kg/(kg.d), the oxygen-enriched oxygen content of the molecular sieve enriching machine is 40%, the oxygen-enriched aeration dissolved oxygen content is 8mg/L, the air-water ratio is 0.3-1.0, the flushing adopts water head drop, the filter material is naturally loosened, the up-and-down oscillation pulse washing time is 1min, and the flushing width is 0.5m. The filtering speed of the secondary gradient magnetic strengthening oxygen-enriched aeration biological filter tank is 1.5m/h, the hydraulic retention time is 1.6h, and the BOD 5 The load was 3.5 kg/(kg.d), 1kg BOD 5 The oxygen demand was 0.3kg.
And (4) mechanically dehydrating and mixing the dry pig manure obtained in the step (1), the high-gradient magnetic reinforced primary anaerobic biological filter tank in the step (2) and the microbial flocs generated by the high-gradient magnetic reinforced secondary oxygen-enriched aeration biological filter tank in the step (3), and preparing the small molecular organic water-soluble fertilizer according to technical indexes meeting national relevant standards (such as national standard GB/T17419-2018) according to other published patent methods of the inventor after the water content is less than or equal to 80%.
Wherein, the high gradient magnetic strengthening magnetic pole adopts a high gradient magnetic pole, the magnetic field intensity of the center of the magnetic pole at the tip of the high gradient magnetic strengthening is 3000GS, and the relative recovery permeability is 8 mu Tcc.
Example 2
Example 2 provides a method for odorless treatment of pig manure water, comprising the following steps:
adding acid into pig manure and urine water tanks of a pig farm to adjust the pH value to 4.0, adding acid functional bacteria of Aspergillus niger Accc30160 with the effective viable count of 30 hundred million/mL and the adding amount of 1% of urine water, wherein the oxygen enrichment content of a molecular sieve reaches 60%. And (5) performing aeration fermentation for 62 hours, and performing solid-liquid separation to obtain dry pig manure and urine water.
Step (2), carrying out first-stage high-gradient magnetic strengthening anaerobic biological filter tank treatment on the urine water obtained in the step (1) to obtain irregular particles of polystyrene, wherein the irregular particles are crushed and sieved by waste packaging box foamed plastics, the porosity is 90%, the particle size of the filter material particles is 10mm, the thickness is 1.8m, the filtering speed is 3.5m/h, the hydraulic retention time is 2.5h, the BOD load is 4.5 kg/(kg.d), and the aeration rate is 0.5:1.0; the water head is lowered for flushing, the filter material is naturally dispersed, the up-down oscillation pulse flushing time is 1min, and the flushing width is 0.5m.
Step (3), the effluent from the step (2) is treated by a secondary gradient magnetic strengthening oxygen-enriched aeration biological filter tank, the filter material is irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, and the porosity is 90%; the particle size of the filter material particles in the primary magnetic reinforced biological filter tank is 4mm, and the thickness is 1m; the particle size of the filter material particles is 2mm, and the thickness is 1.8m; the filtration rate is 1.5m/h, the hydraulic retention time is 1.6h, and the BOD 5 The load was 4.5 kg/(kg.d), 1kg BO 5 Oxygen demand is 0.3kg, the oxygen enrichment amount of the molecular sieve enrichment machine reaches 60%, the oxygen enrichment aeration dissolved oxygen amount is 8mg/L, and the air-water ratio is 0.3:1.0. the water head is lowered for flushing, the filter material is naturally dispersed, the up-down oscillation pulse flushing time is 1min, and the flushing width is 0.5m.
And (4) mechanically dehydrating and mixing the dry pig manure obtained in the step (1), the high-gradient magnetic reinforced primary anaerobic biological filter tank in the step (2) and the microbial flocs generated by the high-gradient magnetic reinforced secondary oxygen-enriched aeration biological filter tank in the step (3), and preparing the small molecular organic water-soluble fertilizer according to technical indexes meeting national relevant standards (such as national standard GB/T17419-2018) according to other published patent methods of the inventor after the water content is less than or equal to 80%.
Wherein, the high gradient magnetic strengthening magnetic pole adopts a high gradient magnetic pole, the magnetic field intensity of the center of the magnetic pole at the tip of the high gradient magnetic strengthening magnetic pole is 2000GS, and the relative recovery permeability is 10 mu Tcc.
Example 3
Example 3 provides a method for odorless treatment of pig manure water, comprising the following steps:
step (1), adding acid into pig manure water tank of pig farm to regulate pH to 4.5, adding acid functional bacteria and thermophilic alicyclic acid bacillus ACCC10221 to make molecular sieve oxygen-enriched quantity be 80% T The effective viable count is 20 hundred million/mL, the addition amount is 3.5 percent of the urine, the aeration fermentation is carried out for 96 hours, and the dry manure and the urine are obtained through solid-liquid separation.
Step (2), the urine water obtained in the step (1) is subjected to high gradientThe magnetic reinforced two-stage anaerobic biological filter tank treatment is carried out, the filter material is irregular particles of polystyrene waste packing box foamed plastic after crushing and sieving, the porosity is 92%, the particle size of the filter material particles is 1mm, the thickness is 1m, the filtering speed is 2.0m/h, the hydraulic retention time is 1h, and the BOD 5 The load is 4.5 kg/(kg.d), the water head is reduced, the filter material is naturally dispersed, the up-down oscillation pulse washing time is 2min, and the washing width is 0.8m.
Step (3), the effluent from the step (2) is treated by a secondary gradient magnetic strengthening oxygen-enriched aeration biological filter tank, the filter material is irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, and the porosity is 93%; the particle size of the filter material particles in the primary magnetic reinforced biological filter tank is 1mm, and the thickness is 1.0m; the hydraulic retention time is 1hBOD load, the oxygen enrichment amount required by kg/d kg BOD is 4.5kg, the oxygen enrichment amount of a molecular sieve eutrophication machine is 40%, the oxygen enrichment aeration dissolved oxygen amount is 10mg/L, and the q gas-water ratio is 0.5:1.0. the water head is lowered for flushing, the filter material is naturally dispersed, the up-down oscillation pulse flushing time is 2min, and the flushing width is 0.8m.
And (4) mechanically dehydrating and mixing the dry pig manure obtained in the step (1), the high-gradient magnetic reinforced primary anaerobic biological filter tank in the step (2) and the microbial flocs generated by the high-gradient magnetic reinforced secondary oxygen-enriched aeration biological filter tank in the step (3), and preparing the small molecular organic water-soluble fertilizer according to technical indexes meeting national relevant standards (such as national standard GB/T17419-2018) according to other published patent methods of the inventor after the water content is less than or equal to 80%.
Wherein, the high gradient magnetic strengthening magnetic pole adopts a high gradient magnetic pole, the magnetic field intensity of the center of the magnetic pole at the tip of the high gradient magnetic strengthening magnetic pole is 2000GS, and the relative recovery permeability is 16 mu Tcc.
Index detection
The effluent quality after the urine water treatment, which is recycled as the flushing water in the embodiments 1-3, is detected by adopting the relevant index regulation in the pollution emission standard of livestock and poultry farming issued by the national quality supervision, inspection and quarantine administration of the original national environmental protection department, and the detection result is as follows:
wherein BOD 5 The standard value is 150mg/L, and the actual measurement control value is less than or equal to 10mg/L; COD standard value is 400mg/L, actual measurement controlThe value is less than or equal to 20mg/L; the standard value of SS is less than or equal to 200mg/L, and the actual measurement control value is less than or equal to 5mg/L; the standard value of ammonia nitrogen is less than or equal to 80mg/L, and the actual measurement control value is less than or equal to 8mg/L; the standard value of total phosphorus (calculated by P) is less than or equal to 8.0mg/L, and the actual measurement control value is less than or equal to 5.0mg/L; the standard value of the fecal coliform number is less than or equal to 10000/mL, and the actual measurement control value is not detected; the standard value of ascarid eggs is less than or equal to 2.0/L, the actual measurement control value is not detected, and the insecticidal rate is 100%; the standard value of the odor concentration (dimensionless) is 70, and the actually measured control value is that the people group cannot feel odor and peculiar smell generally.
The indexes and actual measurement values of the small molecular organic water-soluble fertilizer produced by the patent technology disclosed by the inventor of the embodiment 1-3 are as follows compared with the national standard GB/T17419-2018; the organic matter in the national standard is more than or equal to 10 percent, the actual measurement value is more than or equal to 12 percent, and the N+P in the national standard 2 O 5 +K 2 O is more than or equal to 8%, the measured value is more than or equal to 9% and more than or equal to 2%, the total amount of trace elements (calculated by metal) is more than or equal to 2.3%, the measured value is less than or equal to 0.5% of water insoluble substances, and the measured value is less than or equal to 0.3%.
Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor it is an exhaustive list of all embodiments but obvious variations or modifications from the list are within the scope of the invention as defined in the claims.
Claims (9)
1. The odorless treatment method for the pig manure water is characterized by comprising the following steps of:
adding acid into a pig manure water tank to adjust the pH value to 3-4.5, adding acid functional bacteria into the pig manure water tank to perform odorless fermentation by using oxygen-enriched aeration generated by a molecular sieve oxygen-enriched machine, and performing solid-liquid separation to obtain dry pig manure and urine;
step (2), carrying out high-gradient magnetic strengthening primary anaerobic biological filter tank treatment on the urine water obtained in the step (1);
step (3), the effluent after the treatment of the high-gradient magnetic strengthening primary anaerobic biological filter tank in the step (2) is treated by a secondary high-gradient magnetic strengthening oxygen-enriched biological filter tank, and after the treated effluent is disinfected, the treated effluent is used for recycling flushing water;
and (4) mechanically dehydrating and mixing the dry pig manure obtained in the step (1), the high-gradient magnetic strengthening primary anaerobic biological filter tank in the step (2) and the microbial flocs generated in the high-gradient magnetic strengthening secondary oxygen-enriched aeration biological filter tank in the step (3) until the water content is less than or equal to 80 percent to prepare the small molecular organic water-soluble fertilizer.
2. The method for odorless treatment of swine waste water according to claim 1, wherein in the step (1), the acidic functional bacteria are selected from one or more of yarrowia lipolytica CICC1664, aspergillus niger ACCC30160 and Alicyclobacillus stearothermophilus ACCC 10221T; the acidic functional bacteria are mixed and cultured in advance to form a liquid microbial inoculum, the effective viable count is 10-30 hundred million/mL, the addition amount is 1-5% of urine, and the fermentation time is 24-96h.
3. The method for odorless treatment of pig manure water according to claim 1, wherein in the step (2), the high gradient magnetic strengthening primary anaerobic biological filter tank treatment is performed at a filter speed of 1-5m/h, a hydraulic retention time of 1-4h, a regeneration period of 48-72h and BOD 5 The load is 3.0-5.5 kg/(kg.d).
4. The method for odorless treatment of pig manure water according to claim 1, wherein in the step (3), the secondary gradient magnetic enhanced oxygen-enriched aeration biological filtration tank treatment is performed, the filtration speed is 1-2m/h, the hydraulic retention time is 1-2.5h, the regeneration period is 48-96h, and the BOD 5 The load is 2.5-4.5 kg/(kg.d), 1kg BOD 5 The oxygen enrichment amount is 0.2-0.4kg.
5. The odorless treatment method for pig manure water according to claim 1, wherein the filter materials in the primary high-gradient magnetic strengthening anaerobic biological filter tank and the secondary high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank are irregular particles obtained by crushing and screening waste packing box foamed plastics of polystyrene, and the porosity is 90-95%; the particle size of the filter material particles in the primary high-gradient magnetic reinforced anaerobic biological filter tank is 4-10mm, and the thickness is 1.0-2.6m; the particle size of the filter material particles in the secondary gradient magnetic reinforced oxygen-enriched aeration biological filter tank is 1-3mm, and the thickness is 1.0-2.6m.
6. The odorless treatment method for pig manure water according to claim 5, wherein the oxygen-enriched oxygen content of a molecular sieve oxygen-enriched machine adopted by the secondary gradient magnetic enhanced oxygen-enriched aeration biological filter tank is 40-80%, and the air-water ratio is (0.2-0.5): 1.0, the oxygen-enriched aeration dissolved oxygen amount is 8-10mg/L.
7. The odorless treatment method for pig manure water according to claim 1, wherein when the primary high-gradient magnetic strengthening anaerobic biological filter tank and the secondary high-gradient magnetic strengthening oxygen-enriched aeration biological filter tank reach a regeneration period, forward flushing is adopted, the forward flushing adopts water head descending of upward flow in the tank, filter materials are naturally pulled out, the forward upward and downward pulse oscillation flushing time is 1-3min, and the flushing width is 0.5-1.0m.
8. The odorless treatment method for pig manure water according to claim 1, wherein the high gradient magnetic strengthening magnetic poles are saw-tooth magnetic poles, the distance between two adjacent ends of the saw-tooth magnetic poles is 10-40mm, the central magnetic field strength is 1000-3000Gs, and the relative recovery permeability is 6.0-16.0 mu Tcc.
9. The odorless treatment method of pig manure water according to any one of claims 1 to 8, which can also be used for the treatment of cattle manure water in cattle farms, for the treatment of kitchen waste pressed pulp water, for the treatment of kitchen waste centrifugally separated pulp water, and for the treatment of human manure water in public toilets and in sewage tanks.
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