CN115055483B - Kitchen waste treatment process - Google Patents
Kitchen waste treatment process Download PDFInfo
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- CN115055483B CN115055483B CN202210690724.8A CN202210690724A CN115055483B CN 115055483 B CN115055483 B CN 115055483B CN 202210690724 A CN202210690724 A CN 202210690724A CN 115055483 B CN115055483 B CN 115055483B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
- B09B3/35—Shredding, crushing or cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/60—Biochemical treatment, e.g. by using enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B2101/00—Type of solid waste
- B09B2101/70—Kitchen refuse; Food waste
Abstract
The invention relates to the technical field of garbage treatment, in particular to a kitchen garbage treatment process, which is characterized in that kitchen garbage is crushed, then high-carbon auxiliary materials and a compound microbial agent are added for fermentation treatment, percolate generated after solid-liquid separation is subjected to oil-water separation, an oil phase is recovered, an activated sludge/zeolite mixture is added into an aqueous phase for treatment, and the kitchen garbage treatment process provided by the invention can effectively realize the harmlessness and the volume reduction of the kitchen garbage and has important significance for the treatment of the kitchen garbage in cities.
Description
Technical Field
The invention relates to the technical field of garbage disposal, in particular to a kitchen garbage disposal process.
Background
Kitchen waste refers to waste such as food residues, waste liquid and waste grease generated in the process of food processing, food service, unit meal supply and other activities of hotels, restaurants, institutions, armies, institutions and the like, and in a broad sense, kitchen waste in daily life of people is also listed as kitchen waste.
The kitchen waste is oily, wet, showered and malodorous, affects the sense of comfort and life and sanitation of human vision, smell and the like, has obvious dual properties of waste and resources, is rich in organic matters such as starch, fat, protein, cellulose and the like, contains less toxic and harmful substances and various microelements, has rich influence, is rich resources for preparing animal feeds and organic fertilizers, has high decay and deterioration speed, and is easy to carry and breed bacteria: foot-and-mouth disease, salmonella, toxoplasma, swine fever and the like, and has high decay and deterioration speed and high treatment difficulty.
The current kitchen waste treatment method comprises landfill treatment, incineration treatment, high-temperature aerobic composting treatment, feed treatment and biochemical treatment, but the general treatment effect is not ideal.
Disclosure of Invention
The invention aims to: aiming at the technical problems, the invention provides a kitchen waste treatment process.
The technical scheme adopted is as follows:
a kitchen waste treatment process comprises the following steps: crushing kitchen waste, adding high-carbon auxiliary materials and a composite microbial agent for fermentation treatment, carrying out oil-water separation on percolate generated after solid-liquid separation, recovering an oil phase, and adding an activated sludge/zeolite mixture into the water phase for treatment;
the composite microbial agent comprises bacillus subtilis, klebsiella, pseudomonas avermitilis, actinomycetes at high temperature, bacillus laterosporus and aspergillus niger, and the effective viable count in the composite microbial agent is more than or equal to 100 hundred million CFU/g.
Further, the compound microbial agent also comprises a carrier, and the preparation method of the carrier is as follows:
s1: drying peanut shells, crushing, placing the peanut shells into a polytetrafluoroethylene lining, adding water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 160-180 ℃, reacting for 10-15 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities, obtaining carbonaceous gel, and performing vacuum freeze drying for 10-15 hours for later use;
s2: adding hydroxyethyl cellulose into a sodium hydroxide solution, heating to 40-50 ℃ and stirring for 1-1.5h, adding acrylic acid and carbonaceous gel, continuously stirring for 0.5-1h, adding an initiator and a cross-linking agent, reacting for 5-10h, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh screen.
Further, the neutralization degree of the acrylic acid is 75-85%.
Further, the initiator is a combination of potassium persulfate and sodium bisulfite.
Further, the mass ratio of the potassium persulfate to the sodium bisulfite is 5-10:1.
further, the cross-linking agent is N, N-methylene bisacrylamide.
Further, the high-carbon auxiliary material is crop straw, rice bran or sawdust.
Further, a direct current with the intensity of 10-20mA is applied during fermentation treatment.
Further, the preparation method of the activated sludge/zeolite mixture comprises the following steps:
firstly, performing closed aeration for 24-48h, then starting acclimatization culture, and performing aeration for 18-20 h.d during acclimatization culture -1 Standing for 2-3 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 Maintaining DO not less than 6mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 7.5-8.5, the MLSS is 2000-2200 mg.L -1 After 15-20d, the domestication is completed, and the mass ratio of the domesticated zeolite to zeolite is 1: 1.
Further, the water inlet and outlet is artificial water distribution, and comprises the following components in percentage by weight:
2-4% of ammonium sulfate, 0.5-1% of disodium hydrogen phosphate, 4-6% of sodium bicarbonate, 0.01-0.05% of cerium nitrate, 0.01-0.02% of cobalt chloride, 0.01-0.02% of manganese chloride and the balance of water.
The invention has the beneficial effects that:
the invention adopts the composite microbial agents consisting of bacillus subtilis, klebsiella, trivial pseudomonas, high-temperature actinomycetes, bacillus laterosporus and aspergillus niger to degrade kitchen waste, can rapidly and efficiently decompose organic matters in the kitchen waste, can effectively realize the harmless and volume reduction of the kitchen waste, and the inventor can further reduce COD (chemical oxygen demand) content in a ferment water phase and the content of ammonia nitrogen in the kitchen waste by reasonably preparing the content of various microorganisms, so as to regulate the structure of the flora, improve the microbial degradation activity, improve the efficiency of degrading organic components, protect the microbial activity by the existence of a carrier, facilitate the fixation and proliferation of the microorganisms, facilitate the improvement of the degradation efficiency of the kitchen waste, apply current during fermentation treatment, promote the secretion of lipase, cellulase and protease, improve the degradation efficiency, further reduce COD (chemical oxygen demand) in the mixture of active sludge/zeolite, and reduce the content of ammonia nitrogen in the kitchen waste, and realize the harmless and volume reduction of the kitchen waste.
Drawings
FIG. 1 is an SEM image of a carrier prepared in example 1 of the present invention.
Detailed Description
The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1:
a kitchen waste treatment process comprises the following steps:
s1: crushing the solid in the kitchen waste by using a crusher, adding rice bran and a composite microbial agent, wherein the addition amount of the rice bran and the composite microbial agent is 20% and 3% of the mass of the kitchen waste respectively, uniformly stirring, fermenting for 48 hours, and applying a direct current with the intensity of 15mA during fermentation treatment;
the compound microbial agent comprises 20 parts of bacillus subtilis, 5 parts of Klebsiella nigrescens, 3 parts of trivial pseudomonas, 1 part of high-temperature actinomycetes, 5 parts of bacillus laterosporus and 2 parts of aspergillus niger, wherein the effective viable count is more than or equal to 100 hundred million CFU/g.
The preparation method of the carrier is as follows:
drying and crushing 100g of peanut shells, placing the peanut shells into a polytetrafluoroethylene lining, adding 800mL of water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 170 ℃, reacting for 14 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities to obtain carbonaceous gel, vacuum freeze-drying for 10 hours for later use, adding 46.7g of hydroxyethyl cellulose into 500mL of 0.015mol/L sodium hydroxide solution, heating to 50 ℃ and stirring for 1.5 hours, adding 250mL of acrylic acid and carbonaceous gel with neutralization degree of 80%, continuously stirring for 1 hour, and adding potassium persulfate and sodium bisulphite according to a mass ratio of 8: 1g of initiator and 1g of N, N-methylene bisacrylamide, reacting for 10 hours, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh sieve.
S2: separating oil from water from the percolate generated after solid-liquid separation of the fermented product, recovering oil phase, adding activated sludge/zeolite mixture into the rest water phase for treatment, wherein the addition amount of the activated sludge/zeolite mixture is 4% of the water phase mass, and aerating with a microporous aeration device to control DO of water body to 2.4 mg.L -1 Sampling test after 72 h.
The preparation method of the activated sludge/zeolite mixture comprises the following steps:
the activated sludge is taken from a secondary sedimentation tank of a sewage treatment plant of a long sandy-city lawn pond, is firstly subjected to aeration for 36 hours, and then is subjected to domestication culture, and aeration is carried out for 20 hours.d during the domestication culture -1 Standing for 2.5 h.d -1 Water inlet and outlet of 1 h.d -1 The water inlet and outlet are artificial water distribution, and comprise the following components in percentage by weight: 3% of ammonium sulfate, 1% of disodium hydrogen phosphate, 5% of sodium bicarbonate, 0.05% of cerium nitrate, 0.01% of cobalt chloride, 0.01% of manganese chloride and the balance of water, and DO is maintained to be more than or equal to 6 mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 8.5, the MLSS is 2200 mg.L -1 After 20d, the domestication is completed and the mass ratio of zeolite is 1: 1.
Example 2:
a kitchen waste treatment process comprises the following steps:
s1: crushing the solid in the kitchen waste by using a crusher, adding rice bran and a composite microbial agent, wherein the addition amount of the rice bran and the composite microbial agent is 20% and 3% of the mass of the kitchen waste respectively, uniformly stirring, fermenting for 48 hours, and applying direct current with the intensity of 20mA during fermentation treatment;
the compound microbial agent comprises 20 parts of bacillus subtilis, 5 parts of Klebsiella nigrescens, 3 parts of trivial pseudomonas, 1 part of high-temperature actinomycetes, 5 parts of bacillus laterosporus and 2 parts of aspergillus niger, wherein the effective viable count is more than or equal to 100 hundred million CFU/g.
The preparation method of the carrier is as follows:
drying and crushing 100g of peanut shells, placing the peanut shells into a polytetrafluoroethylene lining, adding 800mL of water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 180 ℃, reacting for 15 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities to obtain carbonaceous gel, vacuum freeze-drying for 15 hours for later use, adding 46.7g of hydroxyethyl cellulose into 500mL of 0.015mol/L sodium hydroxide solution, heating to 50 ℃ and stirring for 1.5 hours, adding 250mL of acrylic acid and carbonaceous gel with neutralization degree of 85%, continuously stirring for 1 hour, and adding potassium persulfate and sodium bisulphite according to a mass ratio of 10: 1g of initiator and 1g of N, N-methylene bisacrylamide, reacting for 10 hours, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh sieve.
S2: separating oil from water from the percolate generated after solid-liquid separation of the fermented product, recovering oil phase, adding activated sludge/zeolite mixture into the rest water phase for treatment, wherein the addition amount of the activated sludge/zeolite mixture is 5% of the water phase mass, and aerating with a microporous aeration device to control DO of water body to 2.4 mg.L -1 Sampling test after 72 h.
The preparation method of the activated sludge/zeolite mixture comprises the following steps:
the activated sludge is taken from a secondary sedimentation tank of a sewage treatment plant of a long sandy-city lawn pond, is firstly subjected to aeration for 48 hours, and then is subjected to domestication culture, and aeration is carried out for 20 hours.d during the domestication culture -1 Standing for 3 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 The water inlet and outlet are artificial water distribution, and comprise the following components in percentage by weight: ammonium sulfate 4%, disodium hydrogen phosphate 1%, sodium bicarbonate 6%, cerium nitrate 0.05%, cobalt chloride 0.02%, manganese chloride 0.02%, and water the balance, with DO not less than 6mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 8.5, the MLSS is 2200 mg.L -1 After 20d, the domestication is completed and the mass ratio of zeolite is 1: 1.
Example 3:
a kitchen waste treatment process comprises the following steps:
s1: crushing the solid in the kitchen waste by using a crusher, adding rice bran and a composite microbial agent, wherein the addition amount of the rice bran and the composite microbial agent is 20% and 3% of the mass of the kitchen waste respectively, uniformly stirring, fermenting for 48 hours, and applying direct current with the intensity of 10mA during fermentation treatment;
the compound microbial agent comprises 20 parts of bacillus subtilis, 5 parts of Klebsiella nigrescens, 3 parts of trivial pseudomonas, 1 part of high-temperature actinomycetes, 5 parts of bacillus laterosporus and 2 parts of aspergillus niger, wherein the effective viable count is more than or equal to 100 hundred million CFU/g.
The preparation method of the carrier is as follows:
drying and crushing 100g of peanut shells, placing the peanut shells into a polytetrafluoroethylene lining, adding 800mL of water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 160 ℃, reacting for 10 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities to obtain carbonaceous gel, vacuum freeze-drying for 10 hours for later use, adding 46.7g of hydroxyethyl cellulose into 500mL of 0.015mol/L sodium hydroxide solution, heating to 40 ℃ and stirring for 1 hour, adding 250mL of acrylic acid and carbonaceous gel with the neutralization degree of 75%, continuously stirring for 0.5 hour, and adding potassium persulfate and sodium bisulphite according to the mass ratio of 5: 1g of initiator and 1g of N, N-methylene bisacrylamide, reacting for 5 hours, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh sieve.
S2: separating oil from water from the percolate generated after solid-liquid separation of the fermented product, recovering oil phase, adding activated sludge/zeolite mixture into the rest water phase for treatment, wherein the addition amount of the activated sludge/zeolite mixture is 3% of the water phase mass, and aerating with a microporous aeration device to control DO of water body to 2.1 mg.L -1 Sampling test after 72 h.
The preparation method of the activated sludge/zeolite mixture comprises the following steps:
the activated sludge is taken from a secondary sedimentation tank of a sewage treatment plant of a long sandy-city lawn pond, is firstly subjected to aeration for 24 hours, and then is subjected to domestication culture, and aeration is carried out for 18 hours.d during the domestication culture -1 Standing for 2 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 The water inlet and outlet are manual water distribution, and the weight percentage is calculated,the composition comprises the following components: 2% of ammonium sulfate, 0.5% of disodium hydrogen phosphate, 4% of sodium bicarbonate, 0.01% of cerium nitrate, 0.01% of cobalt chloride, 0.01% of manganese chloride and the balance of water, and DO is maintained to be more than or equal to 6 mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 7.5, the MLSS is 2000 mg.L -1 After 15d, the domestication is completed and the mass ratio of the zeolite is 1: 1.
Example 4:
a kitchen waste treatment process comprises the following steps:
s1: crushing the solid in the kitchen waste by using a crusher, adding rice bran and a composite microbial agent, wherein the addition amount of the rice bran and the composite microbial agent is 20% and 3% of the mass of the kitchen waste respectively, uniformly stirring, fermenting for 48 hours, and applying direct current with the intensity of 10mA during fermentation treatment;
the compound microbial agent comprises 20 parts of bacillus subtilis, 5 parts of Klebsiella nigrescens, 3 parts of trivial pseudomonas, 1 part of high-temperature actinomycetes, 5 parts of bacillus laterosporus and 2 parts of aspergillus niger, wherein the effective viable count is more than or equal to 100 hundred million CFU/g.
The preparation method of the carrier is as follows:
drying and crushing 100g of peanut shells, placing the peanut shells into a polytetrafluoroethylene lining, adding 800mL of water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 180 ℃, reacting for 10 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities to obtain carbonaceous gel, vacuum freeze-drying for 15 hours for later use, adding 46.7g of hydroxyethyl cellulose into 500mL of 0.015mol/L sodium hydroxide solution, heating to 40 ℃ and stirring for 1.5 hours, adding 250mL of acrylic acid and carbonaceous gel with the neutralization degree of 75%, continuously stirring for 1 hour, and adding potassium persulfate and sodium bisulphite according to the mass ratio of 5: 1g of initiator and 1g of N, N-methylene bisacrylamide, reacting for 10 hours, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh sieve.
S2: separating solid from liquid, separating oil from water, recovering oil phase, adding activated sludge/zeolite mixture into the rest water phase, and treating with water3% of phase mass, adopting a microporous aeration device to perform aeration during treatment, and controlling DO of the water body to be 2.4mg.L -1 Sampling test after 72 h.
The preparation method of the activated sludge/zeolite mixture comprises the following steps:
the activated sludge is taken from a secondary sedimentation tank of a sewage treatment plant of a long sandy-city lawn pond, is firstly subjected to aeration for 24 hours, and then is subjected to domestication culture, and aeration is carried out for 20 hours.d during the domestication culture -1 Standing for 2 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 The water inlet and outlet are artificial water distribution, and comprise the following components in percentage by weight: ammonium sulfate 4%, disodium hydrogen phosphate 0.5%, sodium bicarbonate 6%, cerium nitrate 0.01%, cobalt chloride 0.02%, manganese chloride 0.01%, and water the balance, with DO not less than 6mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 8.5, the MLSS is 2000 mg.L -1 After 20d, the domestication is completed and the mass ratio of zeolite is 1: 1.
Example 5:
a kitchen waste treatment process comprises the following steps:
s1: crushing the solid in the kitchen waste by using a crusher, adding rice bran and a composite microbial agent, wherein the addition amount of the rice bran and the composite microbial agent is 20% and 3% of the mass of the kitchen waste respectively, uniformly stirring, fermenting for 48 hours, and applying direct current with the intensity of 20mA during fermentation treatment;
the compound microbial agent comprises 20 parts of bacillus subtilis, 5 parts of Klebsiella nigrescens, 3 parts of trivial pseudomonas, 1 part of high-temperature actinomycetes, 5 parts of bacillus laterosporus and 2 parts of aspergillus niger, wherein the effective viable count is more than or equal to 100 hundred million CFU/g.
The preparation method of the carrier is as follows:
drying and crushing 100g of peanut shells, placing the peanut shells into a polytetrafluoroethylene lining, adding 800mL of water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 160 ℃, reacting for 15 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities to obtain carbonaceous gel, vacuum freeze-drying for 10 hours, adding 46.7g of hydroxyethyl cellulose into 500mL of 0.015mol/L sodium hydroxide solution, heating to 50 ℃ and stirring for 1 hour, adding 250mL of acrylic acid and carbonaceous gel with neutralization degree of 85%, continuously stirring for 0.5 hour, and adding potassium persulfate and sodium bisulfate according to a mass ratio of 10: 1g of initiator and 1g of N, N-methylene bisacrylamide, reacting for 5 hours, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh sieve.
S2: separating oil from water from the percolate generated after solid-liquid separation of the fermented product, recovering oil phase, adding activated sludge/zeolite mixture into the rest water phase for treatment, wherein the addition amount of the activated sludge/zeolite mixture is 5% of the water phase mass, and aerating with a microporous aeration device to control DO of water body to 2.1 mg.L -1 Sampling test after 72 h.
The preparation method of the activated sludge/zeolite mixture comprises the following steps:
the activated sludge is taken from a secondary sedimentation tank of a sewage treatment plant of a long sandy-city lawn pond, is firstly subjected to aeration for 48 hours, and then is subjected to domestication culture, and aeration is carried out for 18 hours.d during the domestication culture -1 Standing for 3 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 The water inlet and outlet are artificial water distribution, and comprise the following components in percentage by weight: 2% of ammonium sulfate, 1% of disodium hydrogen phosphate, 4% of sodium bicarbonate, 0.05% of cerium nitrate, 0.01% of cobalt chloride, 0.02% of manganese chloride and the balance of water, and DO is maintained to be more than or equal to 6 mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 7.5, the MLSS is 2200 mg.L -1 After 15d, the domestication is completed and the mass ratio of the zeolite is 1: 1.
Comparative example 1:
substantially the same as in example 1, except that no direct current was applied during the fermentation treatment.
Comparative example 2:
substantially the same as in example 1, except that the composite microbial agent does not include a carrier.
Comparative example 3:
substantially the same as in example 1, except that the composite microbial agent does not include Klebsiella nigrescens.
Comparative example 4:
substantially the same as in example 1, except that the composite microbial agent does not include pseudomonas avermitilis.
Performance test:
(1) weight loss ratio (η):
the weight loss ratios of the kitchen wastes after the S1 fermentation treatment in examples 1 to 5 and comparative examples 1 to 4 of the present invention were measured, respectively, and the results are shown in Table 1 below:
η＝[(m 1 -m 2 )/m 1 ]*100％
m 1 to dry weight of kitchen waste before treatment
m 2 For the dry weight of the kitchen waste after treatment
Table 1:
(2) in the embodiments 1-5 and the comparative examples 1-4 of the invention, the liquid phase is taken before the kitchen waste is treated, the COD and the ammonia nitrogen concentration are tested by taking the liquid phase after the oil-water separation, the COD and the ammonia nitrogen concentration are tested by taking the liquid after the treatment respectively, and the degradation rate of the COD and the ammonia nitrogen concentration is calculated, and the results are shown in the following table 2:
TABLE 2
From tables 1 and 2, the kitchen waste treatment process provided by the invention can effectively realize the harmless and volume-reducing treatment of kitchen waste, and has important significance for the treatment of kitchen waste in cities.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A kitchen waste treatment process is characterized in that kitchen waste is crushed, high-carbon auxiliary materials and a composite microbial agent are added for fermentation treatment, percolate generated after solid-liquid separation is subjected to oil-water separation, an oil phase is recovered, and an activated sludge and zeolite mixture is added into the water phase for treatment;
the compound microbial agent comprises bacillus subtilis, klebsiella, pseudomonas avermitilis, actinomycetes at high temperature, bacillus laterosporus and aspergillus niger, and the effective viable count in the compound microbial agent is more than or equal to 100 hundred million CFU/g;
the composite microbial agent also comprises a carrier, and the preparation method of the carrier comprises the following steps:
s1: drying peanut shells, crushing, placing the peanut shells into a polytetrafluoroethylene lining, adding water, placing the polytetrafluoroethylene lining into a stainless steel autoclave, sealing and heating to 160-180 ℃, reacting for 10-15 hours, naturally cooling to room temperature, filtering, sequentially soaking the obtained solid with water and ethanol to remove soluble impurities, obtaining carbonaceous gel, and performing vacuum freeze drying for 10-15 hours for later use;
s2: adding hydroxyethyl cellulose into a sodium hydroxide solution, heating to 40-50 ℃ and stirring for 1-1.5h, adding acrylic acid and carbonaceous gel, continuously stirring for 0.5-1h, adding an initiator and a cross-linking agent, reacting for 5-10h, filtering, washing the obtained solid, drying, crushing and sieving with a 200-mesh screen.
2. The kitchen waste treatment process according to claim 1, wherein the degree of neutralization of the acrylic acid is 75-85%.
3. The kitchen waste treatment process according to claim 1, wherein the initiator is a combination of potassium persulfate and sodium bisulfite.
4. A kitchen waste treatment process according to claim 3, wherein the mass ratio of potassium persulfate to sodium bisulphite is 5-10:1.
5. the kitchen waste treatment process according to claim 1, wherein the cross-linking agent is N, N-methylenebisacrylamide.
6. The kitchen waste treatment process according to claim 1, wherein the high-carbon auxiliary material is crop straw, rice bran or sawdust.
7. The kitchen waste treatment process according to claim 1, wherein a direct current with an intensity of 10-20mA is applied during fermentation treatment.
8. The kitchen waste treatment process according to claim 1, wherein the preparation method of the mixture of activated sludge and zeolite is as follows:
taking activated sludge, performing stuffy aeration for 24-48h, and then starting acclimation culture, wherein aeration is performed for 18-20 h.d during acclimation culture -1 Standing for 2-3 h.d -1 Water inlet and outlet of 0.5-1 h.d -1 Maintaining DO not less than 6mg.L -1 The temperature is more than or equal to 25 ℃, the pH is 7.5-8.5, the MLSS is 2000-2200 mg.L -1 After 15-20d, the domestication is completed, and the mass ratio of the domesticated zeolite to zeolite is 1: 1.
9. The kitchen waste treatment process according to claim 8, wherein the water inlet and outlet is artificial water distribution, and comprises the following components in percentage by weight:
2-4% of ammonium sulfate, 0.5-1% of disodium hydrogen phosphate, 4-6% of sodium bicarbonate, 0.01-0.05% of cerium nitrate, 0.01-0.02% of cobalt chloride, 0.01-0.02% of manganese chloride and the balance of water.
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| CN111574263B (en) * | 2020-05-08 | 2021-10-26 | 清华大学 | Micro-pressure high-temperature organic solid waste treatment system and method with quick microbial start |
| CN112812333B (en) * | 2021-02-18 | 2022-06-21 | 杭州楠大环保科技有限公司 | Preparation method and application of perishable garbage fermentation bacterium carrier |
| CN113172069B (en) * | 2021-04-06 | 2021-12-14 | 杭州楠大环保科技有限公司 | Kitchen waste treatment method |
| CN113789282A (en) * | 2021-09-30 | 2021-12-14 | 北京饕餮环保科技有限公司 | High-temperature aerobic composite microbial agent for kitchen waste treatment and preparation method thereof |
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