CN106148233B - Pediococcus acidilactici and application thereof in kitchen waste - Google Patents
Pediococcus acidilactici and application thereof in kitchen waste Download PDFInfo
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- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- C12N11/02—Enzymes or microbial cells immobilised on or in an organic carrier
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Abstract
The invention provides Pediococcus acidilactici (Pediococcus acidilactici) CY-10 which is classified and named as Pediococcus acidilactici, is preserved in the common microorganism center of China Committee for culture Collection of microorganisms, and is addressed to the institute of microbiology of China academy of sciences No. 3, West Lu No.1, Beijing, Chaoyang, and has the postal code of 100101 and the preservation number of: CGMCC NO.12450, with a preservation date of 2016, 5 and 13. The invention also provides application of the pediococcus acidilactici in treatment of kitchen waste. The pediococcus acidilactici has high activity of protease, amylase and grease hydrolase, can degrade glucose to produce acid, has thermophilic bacteria with high salt tolerance and acid tolerance, can effectively improve the treatment effect of other kitchen garbage, and has weight reduction and efficiency increase of more than 5%.
Description
Technical Field
The invention belongs to the technical field of microorganisms, and particularly relates to pediococcus acidilactici and application of pediococcus acidilactici in kitchen waste treatment.
Background
The kitchen waste is mainly derived from food leftovers (kitchen waste) and edible residues (swill) in catering operation and resident life. In China, the quantity of kitchen waste generated by families, schools, dining halls and the catering industry is large, and if the kitchen waste is not properly treated, the environment is polluted, diseases are spread, and the health of human bodies is harmed. The kitchen waste has the characteristics of high water content (up to 80-95%), high salinity, high organic matter content, easiness in rotting and smelling, breeding of mosquitoes and flies and the like, and the main components of the kitchen waste are water, saccharides, proteins, fat, salinity, grease and the like.
At present, the treatment modes of the kitchen waste are mainly divided into non-biological treatment (incineration, dehydration, vacuum oil residue and the like) and biological treatment (landfill, composting and anaerobic digestion). Wherein, the non-biological treatment mode has the characteristics of insufficient combustion, large energy consumption, high cost, poor effect and the like. Biological treatment mainly utilizes a microbial inoculum with high protease, amylase, lipase and cellulase activity to degrade the degradable part of the kitchen waste into water, carbon dioxide and organic matters, wherein the water and the carbon dioxide can be dissipated into the air, and finally the weight reduction of the kitchen can reach more than 90 percent. The microbial agent for treating the kitchen waste is combined with the professional treatment equipment efficiently, the kitchen waste can be degraded efficiently, timely and quickly, the treatment equipment can be placed in catering places, dining halls, residential quarters, families and other places, the kitchen waste can be treated efficiently, the environmental protection and food problems of related land pollution, illegal cooking oil and the like can be solved, and the kitchen waste treatment equipment is environment-friendly and healthy. However, the conventional biological treatment method has low efficiency and poor effect.
Disclosure of Invention
The first purpose of the invention is to provide pediococcus acidilactici.
The second purpose of the invention is to provide the application of pediococcus acidilactici in the treatment of kitchen waste.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: 1. the Pediococcus acidilactici is classified and named as Pediococcus acidilactici (CY-10) and is preserved in the common microorganism center of China Committee for culture Collection of microorganisms, the microbial research institute of China academy of sciences No. 3, West Lu No.1 Homeh, Beijing, the facing-Yang district, the postal code is 100101, and the preservation number is: CGMCC NO.12450, with a preservation date of 2016, 5 and 13.
The pediococcus acidilactici is applied to the treatment of kitchen waste.
The invention also provides a biological treatment agent for kitchen waste, which comprises Pediococcus acidilactici (CY-10) and kitchen waste treatment bacteria adsorbed on the carrier.
Preferably, the mass ratio of the total mass of the Pediococcus acidilactici (Pediococcus acidilactici) CY-10 and the kitchen waste treatment bacteria to the carrier is (1-3): (10-15); the mass ratio of Pediococcus acidilactici (Pediococcus acidilactici) CY-10 to kitchen waste treatment bacteria is (10-30) to (70-90).
The kitchen waste disposal bacteria is Bacillus subtilis CY-4 which is preserved in the common microorganism center of China Committee for culture Collection of microorganisms, the microbial research institute of China academy of sciences No. 3, Xilu No.1, Beijing, Chaozhou, the rising district, the Naringi district, the postal code is 100101, and the preservation number is: CGMCC NO.12447, with a preservation date of 2016, 5 and 13 months; or Bacillus licheniformis (Bacillus licheniformis) CY-1 which is preserved in the common microorganism center of China Committee for culture Collection of microorganisms, the address is the microorganism research institute of China academy of sciences No. 3, Xilu No.1, North Chen, the south China area, Beijing, the postal code is 100101, and the preservation number is: CGMCC NO.12448, with a preservation date of 2016, 5 and 13 months; or Candida glabrata (Candida glabrata) CY-9, which is preserved in the common microorganism center of the China Committee for culture Collection of microorganisms, and is addressed to the institute of microbiology, China academy of sciences, No. 3, West Lu No.1, North Cheng, the area of Chajing, with the zip code of 100101 and the preservation number of: CGMCC NO.12449, with a preservation date of 2016, 5 and 13.
Preferably, the carrier is wood dust, bran powder and rice husk in a mass ratio of (5-10) - (1-3).
The invention also provides a preparation method of the kitchen waste biological treatment agent, which comprises the following steps:
(1) respectively carrying out streak culture on pediococcus acidilactici and kitchen garbage disposal bacteria in an MRS solid culture medium or an LB culture medium, respectively carrying out seed culture in shake flasks of a liquid fermentation culture medium to obtain seed solutions, and respectively inoculating the seed solutions into a fermentation tank for culture to prepare a liquid microbial agent;
(2) uniformly mixing the wood chips, the bran powder and the rice hulls to obtain a carrier material;
(3) and (3) mixing the liquid microbial agent obtained in the step (1) with the carrier material obtained in the step (2) to obtain the biological treatment agent.
In the step (1), the culture temperature on an MRS solid culture medium or an LB culture medium is 30 ℃, and the culture time is 24 hours; the culture temperature on the liquid fermentation medium is 30 ℃, the culture time is 24h, and the rotating speed of a shake flask is 130 r/min; the culture conditions in the fermentation tank are as follows: temperature: 30 ℃, stirring speed: 130r/min, pH 6.2-7.2, dissolved oxygen: 30%, can pressure: 0.04MPa and the culture time is 24 h.
The invention also provides a treatment method of the kitchen waste, which comprises the following steps:
(1) placing the biological treatment agent according to any one of claims 3 to 5 in a treatment machine, performing preheating operation for 6h while ventilating and stirring;
(2) adding the kitchen waste to be treated into a pre-operated treatment machine, mixing with a biological treatment agent for aerobic fermentation, and ventilating and stirring.
In the step (1), the addition amount of the biological treatment agent is 10-20% of the capacity of the treatment machine; in the step (2), the aerobic fermentation temperature is 45-55 ℃, and the fermentation time is 18-24 h.
Has the advantages that: the Pediococcus acidilactici (CY-10) provided by the invention has high activity of protease, amylase and grease hydrolase, can degrade glucose to produce acid, and has thermophilic bacteria with high salt resistance and acid resistance, and the Pediococcus acidilactici can effectively improve the treatment effect of other kitchen garbage, and the weight reduction and the efficiency increase are more than 5%.
The method for treating the kitchen waste is efficient, rapid and stable, has good treatment effect, can serve household kitchens, restaurants, dining halls and other industries related to food processing, and has good development prospect.
Drawings
FIG. 1 is a graph showing the growth of Pediococcus acidilactici (Pediococcus acicularis) CY-10 on MRS medium;
FIG. 2 is a 100-fold microscopic image of Pediococcus acidilactici (CY-10);
FIG. 3 is a graph showing the growth of Pediococcus acidilactici (Pediococcus acicularis) CY-10 on a modified MRS medium containing 8% NaCl;
FIG. 4 is a graphic representation of the reaction of Pediococcus acidilactici CY-10 methyl Red.
Detailed Description
The following examples are given to illustrate the use of Pediococcus acidilactici (CY-10) of the present invention.
In the present invention,
LB solid medium formula: (10 g of tryptone, 5g of yeast powder, 10g of NaCl and 15-20 g of agar powder, wherein the volume is constant to 1L, and the pH value is adjusted to 7.2 by NaOH.
MRS solid medium formula: 10g of tryptone, 10g of beef extract, 10g of NaCl, 5g of yeast powder, 2g of diamine citrate, 20g of glucose, 801 mL of Tween, 5g of sodium acetate and K2HPO42g，MgS04·7H20.58g of O, 0.25g of manganese sulfate and 15-20 g of agar powder, wherein the volume is fixed to 1L, and the pH value is adjusted to 6.2-6.6.
The formula of the liquid fermentation medium is as follows: 10g of corn flour, 5g of soybean meal, 5g of glucose, 2g of peptone, 1g of NaCl and K2HPO41g，MgSO4·7H2O0.2 g, constant volume to 1L, and natural pH.
EXAMPLE 1 isolation screening of Pediococcus acidilactici CY-10
The separation process of Pediococcus acidilactici (Pediococcus acililicici) CY-10 of the invention comprises the following steps: weighing 10g of rhizosphere soil of the normally mature planted small tomatoes, and adding the soil into 90mL of sterile water to obtain 10-1Culturing the diluted solution in a shaker at 30 ℃ for 2-3 h at 130r/min, and continuously adding sterile water for dilution to respectively obtain 10-5，10-6，10-7，10-8Respectively taking 200uL of the diluent, coating the diluent on an MRS solid plate, culturing for 48 hours at the temperature of 30 ℃, and selecting a single colony to inoculate on the inclined plane of an MRS solid culture medium for storage.
The physiological activity characteristics of Pediococcus acidilactici (Pediococcus acicularis) CY-10 are as follows:
a. morphological characteristics:gram staining is positive, the thallus is in a sphere shape with paired and tetrad arranged, bacterial colonies are cultured on an MRS solid culture medium, the bacterial colonies are small, are grey white, are raised in a circular shape, have smooth surfaces, and are neat, smooth and opaque in edges and have no motility. In the presence of CaCO3The improved MRS solid culture medium can generate a dissolving ring;
b. physiological and biochemical characteristics: the contact enzyme reaction is negative, and the fermented glucose can produce acid and does not produce gas, has high salt resistance, acid resistance and heat resistance, and produces flavor substances of fermented food;
c. pediococcus acidilactici (Pediococcus acililicici) CY-10 strain was subjected to 16S rDNA sequencing by Shanghai Biotechnology engineering Co., Ltd and BLAST comparison was performed in NCBI website. The result shows that the similarity of the 16S rDNA sequence of the strain to the Pediococcus acidilactici E2-Pa of the accession number GB _ K742817 reaches 100 percent, and the strain is identified as Pediococcus acidilactici (Pediococcus acidilactici) CY-10 by combining the morphological characteristics and physiological and biochemical analysis of the strain.
TABLE 1 results of physiological and biochemical tests of CY-10 Strain
Note: + positive, -negative
Separation and screening of Bacillus subtilis CY-4
The separation process of the Bacillus subtilis CY-4 comprises the following steps: weighing 10g of rhizosphere soil for planting grapes in Zhenjiang sentence capacity, and adding 90mL of sterile water to obtain 10-1Culturing the diluted solution in a shaker at 30 ℃ for 2-3 h at 130r/min, and continuously adding sterile water for dilution to respectively obtain 10-5，10-6，10-7，10-8The dilution of (1) was applied to an LB plate in an amount of 200uL, cultured at 30 ℃ for 48 hours, and a single colony was selected and inoculated on an inclined surface of an LB solid medium for preservation.
The physiological activity characteristics of the Bacillus subtilis CY-4 are as follows:
a. morphological characteristics: gram staining is positive, rod-shaped, spore is produced, and the spore is oval. The surface of a colony on an LB solid culture medium is rough, has folds, is opaque, has irregular edges, and is milky white to yellowish;
b. physiological and biochemical characteristics: as shown in table 1, this bacillus subtilis can produce protease, amylase, lipase, gelatinase, etc., and can grow at 55 ℃ at 8% NaCl at pH 5.0;
c. and (3) sequencing results: bacillus subtilis CY-4 strain was subjected to 16S rDNA sequencing by Shanghai Biotechnology engineering Co., Ltd, and BLAST comparison was performed in NCBI website. The result shows that the similarity of the 16S rDNA sequence of the Bacillus subtilis-k 1 with the accession number GB _ GU045558 reaches 99%, and the strain is identified as Bacillus subtilis by combining the morphological characteristics and physiological and biochemical analysis of the strain.
TABLE 2 physiological and biochemical test results of CY-4 Strain
Note: + positive, -negative
Separation and screening of Bacillus licheniformis CY-1
The separation process of the Bacillus licheniformis (Bacillus licheniformis) CY-1 of the invention comprises the following steps: weighing 10g of rhizosphere soil for radish planting in Nanjing Jianning district, and adding 90mL of sterile water to obtain 10g of rhizosphere soil-1Culturing the diluted solution in a shaker at 30 ℃ for 2-3 h at 130r/min, and continuously adding sterile water for dilution to respectively obtain 10-5、10-6、10-7、10-8200ul of the diluent are respectively taken to be coated on an LB plate, cultured for 48 hours at the temperature of 30 ℃, and single colony is selected to be inoculated on the inclined plane of an LB solid culture medium for preservation.
The physiological activity of Bacillus licheniformis (Bacillus licheniformis) CY-1 is characterized as follows:
a. morphological characteristics: gram staining is positive, spores are generated, the spores are oval and are positioned in the middle of the thallus or slightly deviated; the perigenesis flagella exist and can move; the colony on the LB solid culture medium has irregular characters, wave edges, rough and opaque surface and mucus;
b. physiological and biochemical characteristics: can produce protease, amylase, lipase, gelatinase, etc., and can grow at 55 deg.C, 10% NaCl, pH 5.0;
c. and (3) sequencing results: bacillus licheniformis (Bacillus licheniformis) CY-1 strain was assigned to Shanghai Biotechnology engineering Co., Ltd for 16S rDNA sequencing and BLAST alignment was performed at NCBI website. The results showed that the 16S rDNA sequence similarity of Bacillus licheniformis CQN-8 of accession number GB _ KR347301 reached 100%, and the strain was identified as Bacillus licheniformis (Bacillus licheniformis) by combining the morphological characteristics and physiological and biochemical analysis of the strain.
TABLE 3 physiological and biochemical test results of CY-1 Strain
Isolation screening of Candida glabrata (Candida glabrata) CY-9
The separation process of Candida glabrata (Candida glabrata) CY-9 of the invention: weighing 10g of rhizosphere soil of eggplant planted in the host, and adding the rhizosphere soil into 90mL of sterile water to obtain 10-1Culturing the diluted solution in a shaker at 30 ℃ for 2-3 h at 130r/min, and continuously adding sterile water for dilution to respectively obtain 10-5，10-6，10-7，10-8Respectively taking 200uL of the diluent, coating the diluent on an MRS solid plate, culturing for 48 hours at the temperature of 30 ℃, and selecting a single colony to inoculate on the inclined plane of an MRS solid culture medium for storage.
The physiological activity profile of Candida glabrata (Candida glabrata) CY-9 is as follows:
a. morphological characteristics: the colony on the MRS solid culture medium is white to grey white, the surface is smooth, and no wrinkle exists; the spore is single cell, colorless, and has ellipse or oval shape. In the presence of CaCO3Can generate a lysis ring on the modified solid culture medium.
b. Physiological and biochemical characteristics: the thalli are connected by a tiny space to form a lotus node shape.
c. And (3) sequencing results: candida glabrata (Candida glabrata) CY-9 strain was subjected to 26S rDNA sequencing by Shanghai Bioengineering Co., Ltd. and BLAST alignment was performed on NCBI website. The results showed that the sequence similarity reached 99% with the 26S rDNA of Candida glabrata 14/1/z-1 with accession number GB _ KT933331, and the strain was identified as Candida glabrata (Candida glabrata) CY-9 by combining morphological characteristics and physiological and biochemical analysis of the strain.
TABLE 4 physiological and biochemical test results of CY-9 Strain
Example 2 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
Preparation of pediococcus acidilactici-containing biological treatment agent:
(1) culturing Pediococcus acidilactici (CY-10) on MRS solid culture at 30 deg.C for 24 hr; inoculating the mixture into a shake flask of fermentation liquid, and performing shake culture at 30 ℃ and 130r/min for 24h to form seed liquid;
inoculating the seed liquid into a culture material in a fermentation tank according to the volume ratio of 1:400 for fermentation production, wherein the basic working parameters of the fermentation tank are as follows: temperature: 30-35 ℃, stirring speed: 130r/min, pH 6.2-7.2, dissolved oxygen: 30%, can pressure: 0.04 MPa; stopping fermentation after 24h of fermentation, then centrifuging at 6000r/min for 10min, and taking precipitate to dilute with sterile water to prepare a microbial inoculum; the concentration of the viable bacteria in the detected microbial inoculum is 7.3 multiplied by 109CFU/mL；
Preparing a Bacillus subtilis CY-4 microbial inoculum by the same method;
mixing pediococcus acidilactici and bacillus subtilis at a mass ratio of 20:80 to obtain a mixed microbial agent;
(2) preparing wood chips, bran powder and rice hulls into a carrier according to a mass ratio of 7:2: 3;
(3) stirring, mixing and adsorbing the mixed microbial agent and the carrier in a mass ratio of 1:10 in a machine, and then drying at a low temperature (below 45 ℃) to ensure that the water content of the microbial agent is about 10 percent, thus obtaining a finished biological treatment agent.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 10kg of kitchen waste to be treated into a pre-operated treatment machine, mixing with a biological treatment agent for aerobic fermentation, and ventilating and stirring simultaneously; adding 7.86kg of biological treatment agent, fermenting for 24h at the aerobic fermentation temperature of 45-5 ℃, ventilating continuously, rotating the motor forwards for 5min continuously, stopping for 60s, rotating the motor backwards for 5min, stopping for 60s, and executing in a circulating way. The test lasts for 5 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
(3) measuring the reduction effect of the kitchen waste, wherein the calculation method comprises the following steps:
wherein A is the weight of the kitchen processor before adding the kitchen waste and the total weight (kg) of the biological treatment agent; b is the total weight (kg) of the kitchen waste; c is the total weight (kg) of the kitchen processing machine and the contents after the processing.
Control group, preparation method the microbial agent does not include Pediococcus acidilactici (Pediococcus acidilactici) CY-10: CY-4 treatment group: when the kitchen waste is not added, the weight of the processor and the biological treatment agent is 128.05kg (A), 10kg of kitchen waste is added every day, 5 days are continuously added, the total amount of the processor and the biological treatment agent is 50kg (B), and after 5 days, the total weight of the processor and the contents is 133.01kg (C). And (4) calculating the average weight reduction efficiency of the kitchen waste after the processor runs for 5d to be 90.08% according to a formula.
CY-4+ CY-10 treatment group: when the kitchen waste is not added, the weight of the processor and the biological treatment agent is 128.05kg (A), 10kg of kitchen waste is added every day, 5 days are continuously added, the total amount of the processor and the biological treatment agent is 50kg (B), and after 5 days, the total weight of the processor and the contents is 130.16kg (C). And calculating the average weight reduction efficiency of the kitchen waste after the processor runs for 5 days to be 95.78 percent according to a formula.
The weight loss efficiency increase (%) was 5.70%.
Example 3 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
This example is essentially the same as example 2, except that: the kitchen waste treatment bacteria is Bacillus licheniformis (Bacillus licheniformis) CY-1; mixing the pediococcus acidilactici and the bacillus licheniformis in a mass ratio of 25:75 to obtain a mixed microbial agent; the mass ratio of the wood chips, the bran powder and the rice hulls is 8:3: 3; the mass ratio of the microbial agent to the carrier is 1: 11.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 10kg of kitchen waste to be treated into a pre-operated treatment machine, mixing with a biological treatment agent for aerobic fermentation, and ventilating and stirring simultaneously; adding 7.84kg of biological treatment agent, fermenting for 24 hours at the aerobic fermentation temperature of 45-55 ℃, ventilating continuously, rotating the motor forwards for 5min continuously, stopping for 60s, rotating the motor backwards for 5min, stopping for 60s, and executing in a circulating way; the test lasts for 10 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
(3) measuring the reduction effect of the kitchen waste, wherein the calculation method comprises the following steps:
wherein A is the weight of the kitchen processor before adding the kitchen waste and the total weight (kg) of the biological treatment agent; b is the total weight (kg) of the kitchen waste; c is the total weight (kg) of the kitchen processing machine and the contents after the processing.
Control group, preparation method the microbial agent does not include Pediococcus acidilactici (Pediococcus acidilactici) CY-10, CY-1 treatment group: when the kitchen waste is not added, the weight of the processor and the biological treatment agent is 128.85kg (A), 10kg of kitchen waste is added every day, 10 days are continuously added, the total amount of the processor and the biological treatment agent is 100kg (B), and after 10 days, the total weight of the processor and the contents is 142.53kg (C). And calculating the average weight reduction efficiency of the kitchen waste to 86.32% after the processor runs for 10d according to a formula.
CY-1+ CY-10 treatment group: the weight of the disposer and the biological treatment agent is 128.85kg (A) when the kitchen waste is weighed, 10kg of kitchen waste is added every day, 10 days are continuously added, the total amount of the disposer and the biological treatment agent is 100kg (B), and after 10 days, the total weight of the disposer and the contents is 135.67kg (C). And calculating the average weight reduction efficiency of the kitchen waste to be 93.18% after the processor runs for 10d according to a formula.
The weight loss efficiency increase (%) was 6.86%.
Example 4 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
This example is essentially the same as example 2, except that: the kitchen waste disposal bacteria is Candida glabrata (Candida glabrata) CY-9; mixing pediococcus acidilactici and candida glabrata in a mass ratio of 30:70 to obtain a mixed microbial agent; the mass ratio of the wood chips, the bran powder and the rice hulls is 8:1: 3; the mass ratio of the microbial agent to the carrier is 2: 15.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 10kg of kitchen waste to be treated into a pre-operated treatment machine, mixing with a biological treatment agent for aerobic fermentation, and ventilating and stirring simultaneously; adding 8.98kg of biological treatment agent, fermenting for 24 hours at the aerobic fermentation temperature of 45-55 ℃, ventilating continuously, rotating the motor forwards for 5min continuously, stopping for 60s, rotating the motor backwards for 5min, stopping for 60s, and executing in a circulating way; the test lasts for 15 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
(3) measuring the reduction effect of the kitchen waste, wherein the calculation method comprises the following steps:
wherein A is the weight of the kitchen processor before adding the kitchen waste and the total weight (kg) of the biological treatment agent; b is the total weight (kg) of the kitchen waste; c is the total weight (kg) of the kitchen processing machine and the contents after the processing.
Control group, preparation method the microbial agent does not include Pediococcus acidilactici (Pediococcus acidilactici) CY-10, CY-9 treatment group: when the kitchen waste is not added, the weight of the processor and the biological treatment agent is 128.98kg (A), 10kg of kitchen waste is added every day, 15 days are continuously added, the total amount of the processor and the biological treatment agent is 150kg (B), and after 15 days, the total weight of the processor and the contents is 150.34kg (C). And calculating the average weight reduction efficiency of the kitchen waste to be 85.75% after the processor runs for 15d according to a formula.
CY-9+ CY-10 treatment group: when the kitchen waste is not added, the weight of the processor and the biological treatment agent is 128.98kg (A), 10kg of kitchen waste is added every day, 15 days are continuously added, the total amount of the processor and the biological treatment agent is 150kg (B), and after 15 days, the total weight of the processor and the contents is 137.89kg (C). And (4) calculating the average weight reduction efficiency of the kitchen waste after the processor runs for 15d to be 94.06% according to a formula.
The weight loss efficiency increase (%) was 8.31%.
Example 5 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
This example is essentially the same as example 2, except that: mixing pediococcus acidilactici and bacillus subtilis in a mass ratio of 10:90 to obtain a mixed microbial agent; the mass ratio of the wood chips, the bran powder and the rice hulls is 5:1: 3; the mass ratio of the microbial agent to the carrier is 1: 15.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 10kg of kitchen waste to be treated into a pre-operated treatment machine (the capacity of a treating agent is 100kg), mixing with a biological treating agent, performing aerobic fermentation, and ventilating and stirring; adding 6.93kg of biological treatment agent, fermenting at 45 deg.C for 24h, ventilating, rotating forward for 5min, stopping for 60s, rotating backward for 5min, stopping for 60s, and performing circularly; the test lasts for 7 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
the average weight loss efficiency of the kitchen waste after the processor runs for 7d is calculated to be 89.02% according to a formula by a CY-4 control group; CY-4+ CY-10 treatment group; calculating the average weight reduction efficiency of the kitchen waste to be 95.16% after the processor runs for 7d according to a formula;
the weight loss efficiency increase (%) was 6.14%.
Example 6 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
This example is essentially the same as example 2, except that: mixing pediococcus acidilactici and bacillus subtilis at a mass ratio of 30:70 to obtain a mixed microbial agent; the mass ratio of the wood chips, the bran powder and the rice hulls is 10:3:1, and the mass ratio of the microbial agent to the carrier is 3: 10.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 20kg of kitchen waste to be treated into a pre-operated treatment machine (the capacity of a treating agent is 100kg), mixing with a biological treating agent, performing aerobic fermentation, and ventilating and stirring simultaneously; adding 7.23kg of biological treatment agent, fermenting at 55 deg.C for 18h, ventilating, rotating forward for 5min, stopping for 60s, rotating backward for 5min, stopping for 60s, and performing circularly; the test lasts for 14 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
the average weight loss efficiency of the kitchen waste after the processor runs for 14d is calculated to be 89.36% according to a formula by a CY-4 control group; CY-4+ CY-10 treatment group; calculating the average weight reduction efficiency of the kitchen waste to 96.02% after the processor runs for 14d according to a formula;
the weight loss efficiency increase (%) was 6.66%.
Example 7 preparation of biological treatment agent containing Pediococcus acidilactici microbial inoculum and application of biological treatment agent in kitchen waste
This example is essentially the same as example 2, except that: mixing pediococcus acidilactici and bacillus subtilis at a mass ratio of 20:80 to obtain a mixed microbial agent; the mass ratio of the wood chips, the bran powder and the rice hulls is 7:2: 2; the mass ratio of the microbial agent to the carrier is 2: 13.
The weight reduction efficiency test of the biological treatment agent after the kitchen waste treatment is as follows:
(1) the kitchen waste comprises the following components: removing large and hard parts such as plastic or bone from the food left in the canteen;
(2) the biological treatment agent prepared by the method is applied to the treatment of the kitchen waste: preheating and running for 6h, and ventilating and stirring simultaneously; adding 10kg of kitchen waste to be treated into a pre-operated treatment machine (the capacity of a treating agent is 100kg), mixing with a biological treating agent, performing aerobic fermentation, and ventilating and stirring; adding 7.88kg of biological treatment agent, fermenting at aerobic fermentation temperature of 50 ℃ for 24h, continuously ventilating, continuously positively rotating the motor for 5min, stopping for 60s, reversely rotating for 5min, stopping for 60s, and circularly executing; the test lasts for 24 days, 10kg of the feed is added every day, and the feed is fed once every 24 hours;
in the comparison group, the average decrement efficiency of the weight of the kitchen waste after the processor runs for 21d is calculated to be 89.97% according to a formula; CY-4+ Cl-8 treatment group; calculating the average weight reduction efficiency of the kitchen waste to be 95.89% after the processor runs for 21d according to a formula;
the weight loss efficiency increase (%) was 5.92%.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the appended claims.
Claims (5)
1. A biological treatment agent for kitchen waste is characterized in that: comprises pediococcus acidilactici adsorbed on a carrier (Pediococcus acidilactici) CY-10 and kitchen waste treatment bacteria; said Pediococcus acidilactici: (Pediococcus acidilactici) The mass ratio of the total mass of the CY-10 and the kitchen waste treatment bacteria to the carrier is (1-3): (10-15); pediococcus acidilactici (Pediococcus acidilactici) The mass ratio of CY-10 to kitchen waste treatment bacteria is (10-30) to (70-90); the carrier is wood dust, bran powder and rice husk in a mass ratio of (5-10) to (1-3);
the lactic acid tabletCoccus, which is classified and named as Pediococcus acidilactici: (Pediococcus acidilactici) CY-10, deposited in the China general microbiological culture Collection center, the microbial research institute of China academy of sciences, institute No. 3, West Lu No.1, North Cheng, the south facing Yang, Beijing, with a zip code of 100101 and a deposition number of: CGMCC NO.12450, with a preservation date of 2016, 5 and 13 months;
the kitchen waste treatment bacteria are bacillus subtilis (Bacillus subtilis)Bacillus subtilis) CY-4, which is preserved in the China general microbiological culture Collection center, the microbial research institute of China academy of sciences, institute No. 3, West Lu No.1, North Cheng, south China, Beijing, and is assigned with a zip code of 100101 and a preservation number of: CGMCC NO.12447, with a preservation date of 2016, 5 and 13 months; or Bacillus licheniformis (Bacillus licheniformis）CY-1, which is preserved in the China general microbiological culture Collection center, the microbial research institute of China academy of sciences, institute No. 3, West Lu No.1, North Cheng, south China, Beijing, and is assigned with the zip code of 100101 and the preservation number of: CGMCC NO.12448, with a preservation date of 2016, 5 and 13 months; or Candida glabrata (Candida glabrata) CY-9, which is preserved in the China general microbiological culture Collection center, the microbial research institute of China academy of sciences, institute No. 3, West Lu No.1, North Cheng, south China, Beijing, and is assigned with a zip code of 100101 and a preservation number of: CGMCC NO.12449, with a preservation date of 2016, 5 and 13.
2. The method for producing a biological treatment agent for kitchen waste according to claim 1, characterized in that: the method comprises the following steps:
(1) respectively carrying out streak culture on pediococcus acidilactici and kitchen garbage disposal bacteria in an MRS solid culture medium or an LB culture medium, respectively carrying out seed culture in shake flasks of a liquid fermentation culture medium to obtain seed solutions, and respectively inoculating the seed solutions into a fermentation tank for culture to prepare a liquid microbial agent;
(2) uniformly mixing the wood chips, the bran powder and the rice hulls to obtain a carrier material;
(3) and (3) mixing the liquid microbial agent obtained in the step (1) with the carrier material obtained in the step (2) to obtain the biological treatment agent.
3. The method for producing a biological treatment agent for kitchen waste according to claim 2, comprising: in the step (1), the culture temperature on an MR body culture medium or an LB culture medium is 30 ℃, and the culture time is 24 hours; the culture temperature on the liquid fermentation medium is 30 ℃, the culture time is 24h, and the rotating speed of a shake flask is 130 r/min; the culture conditions in the fermentation tank are as follows: temperature: 30 ℃, stirring speed: 130r/min, pH = 6.2-7.2, dissolved oxygen: 30%, can pressure: 0.04MPa and the culture time is 24 h.
4. A treatment method of kitchen waste is characterized by comprising the following steps: the method comprises the following steps:
(1) placing the biological treatment agent of claim 1 in a treatment machine, and performing preheating operation for 6h while ventilating and stirring;
(2) adding the kitchen waste to be treated into a pre-operated treatment machine, mixing with a biological treatment agent for aerobic fermentation, and ventilating and stirring.
5. The method for treating the kitchen waste according to claim 4, characterized in that: in the step (1), the addition amount of the biological treatment agent is 10-20% of the capacity of the treatment machine; in the step (2), the aerobic fermentation temperature is 45-55 ℃, and the fermentation time is 18-24 h.
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