CN115974600A - Method for treating and recycling liquid organic kitchen garbage - Google Patents
Method for treating and recycling liquid organic kitchen garbage Download PDFInfo
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- CN115974600A CN115974600A CN202211690515.XA CN202211690515A CN115974600A CN 115974600 A CN115974600 A CN 115974600A CN 202211690515 A CN202211690515 A CN 202211690515A CN 115974600 A CN115974600 A CN 115974600A
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Abstract
The invention discloses a method for treating and recycling liquid organic kitchen garbage; belongs to the technical field of waste recycling; the method comprises the following steps: firstly, screening inorganic matters in the kitchen waste, pulping the residual organic kitchen waste to obtain liquid organic kitchen waste; uniformly mixing the composite bacterial powder for treating the kitchen waste with a carrier to obtain a composite microbial inoculum; and (3) uniformly mixing the liquid organic kitchen garbage, sawdust and the composite microbial inoculum, performing aerobic fermentation, and measuring a product. Wherein the kitchen garbage treatment at least includes with compound fungus powder: candida tropicalis, bacillus stearothermophilus, bacillus cereus, acetobacter aceti Orerlangae subspecies, bacillus megaterium and candida albicans; the adding amount is 3 to 8 percent; the invention has higher degradation rate and deodorization performance on the liquid organic kitchen garbage, and can achieve better resource utilization effect.
Description
Technical Field
The invention belongs to the technical field of waste recycling, and particularly relates to a method for treating and recycling liquid organic kitchen waste.
Background
The economic development is rapid, the living standard of farmers is continuously improved, and the generation amount of solid waste garbage is greatly increased. Particularly, the perishable wastes such as kitchen waste, vegetable residues and the like increase before the proportion of solid waste garbage; the perishable waste contains a large amount of organic matters, and also contains abundant macronutrient elements, secondary nutrient elements and various micronutrient elements such as nitrogen, phosphorus, potassium, calcium and the like. The putrescible wastes after reasonable treatment are important resources for preparing animal feed and organic fertilizer. In recent years, the treatment force and the investment on the perishable wastes such as the kitchen and the like are continuously increased, but the problems of poor treatment efficiency, low economy, poor operation environment benefit and the like still exist, most of the problems still exist in the conventional process because the quality of rear-end products is not high, and the resource utilization rate is very low.
Biotransformation is an important means for low-carbon treatment and recycling of perishable wastes; however, the current microbial and insect biotransformation treatment technology mode for perishable wastes still has many difficulties which need to be broken through, for example, the insect biotransformation technology has the problems of high requirement on sites, long breeding period, or large environmental influence caused by micro negative pressure deodorization, and the like. The risk of directly preparing organic fertilizer from kitchen garbage fermentation products is unknown. Domestic patent CN 109867537A discloses a method for treating and recycling liquid organic kitchen waste; the method comprises the following steps: adjusting the initial pH value of the liquid kitchen waste, inoculating aspergillus fumigatus NJZ5 bacterial liquid, bacillus subtilis NJN-6 bacterial liquid and bacillus amyloliquefaciens SQR9 bacterial liquid, and introducing sterile air for 4 to 8 minutes every 3 to 4 hours after inoculation to enable the liquid kitchen waste to be in an aerobic fermentation state; the treated liquid organic kitchen garbage is completely decomposed without odor and peculiar smell, and the fermentation product can be applied to farmland soil or made into a commercial liquid compound microbial fertilizer.
Disclosure of Invention
The invention aims to provide a treatment method with high degradation rate and deodorization performance on liquid organic kitchen garbage, and can achieve a good resource utilization effect.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a composite bacterial powder for treating kitchen waste at least comprises: candida tropicalis, bacillus stearothermophilus, bacillus cereus, acetobacter aceti Orlandia subspecies, bacillus megaterium and Candida albicans. By adopting the technical scheme of the invention, the liquid organic kitchen waste can be better degraded, and the liquid organic kitchen waste has better deodorization performance and can be obtained with higher decomposition degree, thereby achieving better resource utilization.
Preferably, in one embodiment, the complex bacterial powder for treating kitchen waste comprises candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans.
More preferably, in one embodiment, the weight ratio of the candida tropicalis, the acetobacter aceti subspecies olacois, the bacillus megaterium and the candida albicans is 1 to 3. According to the invention, candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans are used as the composite bacterial powder together, and the composite bacterial agent is prepared with the carrier, so that the liquid organic kitchen garbage is treated, the degradation rate and the deodorization effect of the liquid organic kitchen garbage are improved, and meanwhile, the high compost maturity is achieved, and the good resource utilization is achieved.
Preferably, in one embodiment, the number of viable bacteria of the composite bacterial powder for treating kitchen waste is more than or equal to 5 × 10 7 CFU/mL。
The invention also provides a method for treating and recycling the liquid organic kitchen waste, which comprises the following steps:
firstly, screening inorganic matters in the kitchen waste, pulping the residual organic kitchen waste to obtain liquid organic kitchen waste;
uniformly mixing the composite bacteria for treating the kitchen waste with a carrier to obtain a composite microbial inoculum;
and (3) uniformly mixing the liquid organic kitchen garbage, sawdust and the composite microbial inoculum, performing aerobic fermentation, and determining a product.
Preferably, in one embodiment, the carrier is at least one of activated carbon, peanut shell, wheat bran, corn leaf, wheat straw and brick powder.
Preferably, in one embodiment, the weight ratio of the complex bacteria for treating kitchen waste to the carrier is 1 to 4-9.
Preferably, in an embodiment, the amount of the sawdust added is 8 to 20% of the weight of the liquid organic kitchen waste.
Preferably, in one embodiment, the aerobic fermentation temperature is 30 to 45 ℃, and the fermentation time is 24 to 72h.
Preferably, in one embodiment, the degradation rate of the liquid organic kitchen waste is higher than 40%.
Preferably, in one embodiment, the adding amount of the composite bacterial powder for treating kitchen waste is 3 to 8 percent of the weight of the liquid organic kitchen waste.
a) The technical scheme of the invention can better degrade the liquid organic kitchen garbage, has better deodorization performance on the liquid organic kitchen garbage and obtains kitchen garbage with higher decomposition degree, thereby achieving better resource utilization;
b) According to the invention, candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans are used as the composite bacterial powder together, and the composite bacterial agent is prepared with the carrier, so that the liquid organic kitchen garbage is treated, the degradation rate and the deodorization effect of the liquid organic kitchen garbage are improved, and meanwhile, the high compost maturity is achieved, and the good resource utilization is achieved.
Therefore, the invention is a treatment method with higher degradation rate and deodorization performance on the liquid organic kitchen garbage, and can achieve better resource utilization effect.
Drawings
FIG. 1 is an infrared spectrum of wheat straw before and after modification in example 4.
Detailed Description
The present invention is described in further detail below with reference to specific embodiments, and the examples are given only for illustrating the present invention and not for limiting the scope of the present invention. The examples provided below serve as a guide for further modifications by a person skilled in the art and do not constitute a limitation of the invention in any way.
It should be noted that, unless otherwise specified, the experimental methods of the present invention are all conventional methods; the materials, reagents and the like used are commercially available unless otherwise specified.
The Latin and the preservation number of the strain used in the invention are respectively as follows: candida tropicalis: (Candida tropicalis(ii) a ACCC 20201), bacillus stearothermophilus (B.) (Bacillus stearothermophilus(ii) a CMCC 63509), bacillus cereus (B.cereus)Bacillus cereus(ii) a CMCC 63302), acetobacter aceti Orlandia subspecies (Acetobacter aceti subsp. orleanensis(ii) a CICC 7001), bacillus megaterium (B.megaterium)Bacillusmegaterium(ii) a ACCC 11011) Candida albicans (C.albicans: (C.albicans))canidia Albicans；ATCC90029）。
The activation steps of each strain of the invention are as follows: respectively inoculating each strain to a PDA (potato dextrose agar) plate culture medium, culturing at 25-35 ℃ for 24-48h, then respectively inoculating each cultured strain single colony to a corresponding slant culture medium, culturing at 25-35 ℃ for 24-48h at constant temperature, and after the culture is finished, placing in a refrigerator at 3-5 ℃ for storage for later use.
The preparation method of the composite bacterial powder for treating kitchen waste comprises the steps of inoculating each strain into a mixed fermentation liquid culture medium according to a proportion, intermittently oscillating with oxygen supply at the temperature of 30-35 ℃ (oscillating for 8-12h, standing for 8-12h, and circularly oscillating at the rotating speed of 150-200r/min), culturing for 72-90h, centrifuging at the temperature of 0-3 ℃ and at the rotating speed of 6000-10000 r/min, concentrating, and freeze-drying to obtain the composite bacterial powder.
Specifically, the invention discloses a method for treating and recycling liquid organic kitchen waste, which comprises the following steps:
firstly, screening inorganic matters in the kitchen waste, and pulping the residual organic kitchen waste in a homogenizing agent to obtain liquid organic kitchen waste;
inoculating each strain into a mixed fermentation liquid culture medium according to a ratio, intermittently oscillating (oscillating for 8 to 12h and standing for 8 to 12h at a rotation speed of 150 to 200r/min) at a temperature of 30 to 35 ℃ under the condition of intermittent oxygen supply, culturing for 72 to 90h, centrifuging at a temperature of 0 to 3 ℃ under a rotation speed of 6000 to 10000r/min, concentrating, and freeze-drying to obtain composite bacterial powder;
uniformly mixing the composite bacterial powder for treating the kitchen waste with a carrier according to the weight ratio of 1 to 4 to 9 to obtain a composite bacterial agent;
uniformly mixing liquid organic kitchen waste, sawdust and a composite microbial inoculum, wherein the adding amount of the composite microbial inoculum for treating the kitchen waste is 3-8% of the weight of the liquid organic kitchen waste, the adding amount of the sawdust is 8-20% of the weight of the liquid organic kitchen waste, then introducing sterile air at 28-35 ℃ for aerobic fermentation for 16-48h, and determining a product.
Further, in the embodiment of the invention, citric acid fatty glyceride is added in the aerobic fermentation process, and the adding amount of the citric acid fatty glyceride is 0.45 to 1 percent of the weight of the liquid organic kitchen waste. The addition of the citric acid fatty glyceride can provide nutrient substances for the strains, so that the strains can better survive and propagate, and the composite microbial inoculum and the liquid organic kitchen waste can be better subjected to aerobic fermentation, thereby achieving the purposes of kitchen waste degradation and resource utilization.
In another embodiment of the invention, 1-pyridine-3-cyclopropylamine is used for modifying wheat straws to obtain modified wheat straws, and the modified wheat straws are used as carriers and mixed with composite bacterial powder to prepare the composite microbial inoculum for treating liquid organic kitchen waste, so that the degradation rate of the kitchen waste is improved, and the kitchen waste is effectively recycled.
In an embodiment of the present invention, a method for preparing modified wheat straw comprises:
providing wheat straws, cleaning the wheat straws with water, removing impurities on the surfaces of the wheat straws, soaking the wheat straws in the water for 12 to 20h, drying, crushing and sieving to obtain pretreated wheat straws;
adding the pretreated wheat straws into a container, adding a sodium hydroxide solution, epoxy chloropropane and absolute ethyl alcohol, reacting for 2 to 4 hours at constant temperature under oscillation, filtering and washing; and then putting the mixture into another dry container, adding 1-pyridine-3-cyclopropyl amine and absolute ethyl alcohol, oscillating and reacting for 4 to 8h at constant temperature, filtering, washing and drying to obtain the modified wheat straw.
Further, in the preparation method of the modified wheat straw, 2 to 5 parts of the pretreated wheat straw, 140 to 200 parts of sodium hydroxide solution, 30 to 50 parts of epoxy chloropropane, 15 to 25 parts of 1-pyridine-3-cyclopropyl amine and 50 to 120 parts of absolute ethyl alcohol are calculated according to parts by weight.
Further, in the preparation method of the modified wheat straw, the constant-temperature oscillation temperature is 50-70 ℃.
The technical solution of the present invention is further described in detail with reference to the following embodiments:
example 1:
a method for treating and recycling liquid organic kitchen waste comprises the following steps:
firstly screening inorganic substances such as metal impurities in the kitchen waste, and then pulping the residual organic kitchen waste in a homogenizing agent to obtain liquid organic kitchen waste;
inoculating candida tropicalis, acetobacter aceti, oerlan subspecies, bacillus megaterium and candida albicans into a PDA fermentation liquid culture medium according to the weight ratio of 1;
uniformly mixing the composite bacterial powder for treating the kitchen waste with wheat straws in a weight ratio of 1;
uniformly mixing liquid organic kitchen waste, sawdust and the composite microbial inoculum, wherein the adding amount of the composite microbial inoculum for treating the kitchen waste is 3.5 percent of the weight of the liquid organic kitchen waste, the adding amount of the sawdust is 10 percent of the weight of the liquid organic kitchen waste, then introducing sterile air at 32 ℃ for aerobic fermentation for 36h, and determining a product.
Example 2:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: inoculating candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans into a PDA fermentation liquid culture medium according to the weight ratio of 2; the other steps are the same as in example 1.
Example 3:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: the weight ratio of the composite bacterial powder for treating the kitchen waste to the wheat straw in the composite bacterial agent is 1; the other steps are the same as in example 1.
Example 4:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: uniformly mixing 100 parts by weight of liquid organic kitchen waste, sawdust and citric acid fatty glyceride with the composite microbial inoculum, wherein the adding amount of the composite microbial inoculum for treating the kitchen waste is 3.5 percent of the weight of the liquid organic kitchen waste, the adding amount of the sawdust is 10 percent of the weight of the liquid organic kitchen waste, the adding amount of the citric acid fatty glyceride is 0.45 percent of the weight of the liquid organic kitchen waste, and then introducing sterile air at 32 ℃ for aerobic fermentation for 36 hours to determine a product; the other steps are the same as in example 1.
Example 5:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: the adding amount of the citric acid fatty glyceride is 0.75 percent of the weight of the liquid organic kitchen garbage, then sterile air is introduced at 32 ℃ for aerobic fermentation for 36 hours, and the product is measured; the other steps are the same as in example 1.
Example 6:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: adding 1% citric acid fatty glyceride by weight of liquid organic kitchen garbage, introducing sterile air at 32 deg.C for aerobic fermentation for 36h, and measuring the product; the other steps are the same as in example 1.
Example 7:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: uniformly mixing the composite bacterial powder for treating the kitchen waste with the modified wheat straw according to a weight ratio of 1; wherein the content of the first and second substances,
the preparation method of the modified wheat straw comprises the following steps:
providing wheat straws, cleaning the wheat straws with water to remove impurities on the surface of the wheat straws, soaking the wheat straws in the water for 18 hours, drying the wheat straws to constant weight, crushing the wheat straws by using a crusher, and sieving the wheat straws to obtain pretreated wheat straws;
adding 2.5 parts by weight of the pretreated wheat straw into a container, adding 160 parts by weight of 2mol/L sodium hydroxide solution, 35 parts by weight of epichlorohydrin and 50 parts by weight of absolute ethyl alcohol, carrying out constant-temperature oscillation reaction at 60 ℃ for 3 hours, filtering and washing; and putting the mixture into another dry container, adding 18 parts by weight of 1-pyridine-3-cyclopropyl amine and 60 parts by weight of absolute ethyl alcohol, continuing to perform constant-temperature oscillation reaction for 5 hours, filtering, washing unreacted substances with distilled water, and drying to constant weight to obtain the modified wheat straw.
Example 8:
the method for treating and recycling the liquid organic kitchen waste is different from the embodiment 4 in that: replacing the wheat straws with modified wheat straws; the preparation method of the modified straw was the same as that of example 7.
Example 9:
the method for treating and recycling the liquid organic kitchen waste is different from the method in the embodiment 1: inoculating acetobacter aceti Orelandii subspecies, bacillus megaterium and candida albicans into a PDA fermentation liquid culture medium at a weight ratio of 1; the other steps are the same as in example 1.
The present invention adopts spectrophotometry to count the viable bacteria number of the composite bacterial powder for treating kitchen garbage obtained in each example, wherein the viable bacteria number is not less than 5 multiplied by 10 7 CFU/mL。
Example 10:
1. infrared spectrum test of modified wheat straw
Performing infrared spectrum test on the modified wheat straw by using NEXUS 470 type Fourier infrared spectrum instrument, wherein the test range is 500-4000cm -1 。
FIG. 1 is an infrared spectrum of wheat straw before and after modification in example 4; as can be seen from FIG. 1, the modified straw was found to be 3410cm in length relative to the unmodified straw -1 The characteristic absorption peak appearing nearby becomes wide and strong, and may be the stretching vibration of N-H; at 3050cm -1 The characteristic absorption peak appearing nearby is the stretching vibration of pyridine; at 1590cm -1 Stretching vibration with a characteristic absorption peak of C = N appearing nearby; therefore, the modified wheat straw is successfully prepared by utilizing the 1-pyridine-3-cyclopropyl amine to modify the wheat straw.
2. Liquid organic kitchen garbage degradation performance test
The fermentation products in the embodiments are weighed, and then the reduction amount of the kitchen waste is calculated, wherein the reduction amount is one of the most visual indexes for measuring the degradation effect of the kitchen waste.
TABLE 1 degradation Rate/% of liquid organic kitchen waste
As can be seen from table 1, the degradation rate of the liquid organic kitchen waste in examples 1-3 and 9 is higher than 40%, which indicates that the liquid organic kitchen waste can be better degraded by the technical scheme of the present invention; comparing example 1 with example 9, the degradation rate of the liquid organic kitchen waste in example 1 is higher than that in example 9, which shows that the liquid organic kitchen waste is treated by using the composite bacterial powder prepared from the candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans together with the carrier, so that the degradation rate of the liquid organic kitchen waste is improved; the degradation rate of the liquid organic kitchen waste in examples 4-6 is higher than 44%, and the degradation rate of the liquid organic kitchen waste in examples 4-6 is higher than that in example 1 by comparing examples 1 with examples 4-6, which indicates that the citric acid fatty glyceride added in the treatment process of the liquid organic kitchen waste can provide nutrient substances for strains, so that the strains can better survive and propagate, and further, the composite microbial inoculum and the liquid organic kitchen waste can better perform aerobic fermentation, and the degradation of the kitchen waste can be better achieved.
In addition, the degradation rate of the liquid organic kitchen waste in example 7 is higher than 43%, the degradation rate of the liquid organic kitchen waste in example 8 is higher than 45%, and the degradation rate of the liquid organic kitchen waste in example 7 is higher than that in example 1 by comparing example 1 with example 7, which shows that the modified wheat straw is obtained by modifying the wheat straw with 1-pyridin-3-yl-cyclopropyl-amine, and the modified wheat straw is used as a carrier and mixed with the composite bacterial powder to prepare the composite bacterial agent for treating the liquid organic kitchen waste, so that the degradation rate of the kitchen waste is improved; and the degradation rate of the liquid organic kitchen waste in the embodiment 8 is obviously higher than that in the embodiments 1 and 4, which shows that the degradation rate of the liquid organic kitchen waste is obviously improved by taking the modified wheat straws as the carrier of the composite bacterial powder and adding citric acid fatty glyceride in the kitchen waste treatment process.
3. Deodorization performance test of liquid organic kitchen garbage
Taking 15g of fermentation product of the liquid organic kitchen waste in each embodiment and odorless water mixed liquor stock solution to dilute by 3 times, respectively placing the diluted products and the odorless water mixed liquor stock solution into containers, diluting 15mL of mixed sample during testing until the odor of the mixed sample can be smelled, and recording the dilution times, namely the odor threshold value (taking the liquid organic kitchen waste which is not fermented as a blank control group), wherein the calculation formula is as follows:
sniffing threshold value = (kitchen waste mixed sample (mL) + odorless water volume (mL))/kitchen waste mixed sample (mL)
TABLE 2 smell threshold of fermented liquid organic kitchen waste
As can be seen from Table 2, the odor threshold of the fermented liquid organic kitchen waste in examples 1-3 and 9 is lower than 350, and is far lower than that of the blank control group; the technical scheme of the invention has better deodorization performance on the liquid organic kitchen garbage; comparing example 1 with example 9, the olfactory threshold of the liquid organic kitchen waste after fermentation in example 1 is lower than that in example 9, which shows that the composite microbial agent is prepared by using candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans as composite microbial powder and a carrier, and then the liquid organic kitchen waste is treated, so that the deodorization effect of the composite microbial agent on the liquid organic kitchen waste is improved; the odor threshold of the liquid organic kitchen waste after fermentation in examples 4-6 is lower than 285, and the odor threshold of the liquid organic kitchen waste after fermentation in examples 4-6 is lower than that in example 1 by comparing examples 1 and 4-6 with examples 4-6, which indicates that the citric acid fatty glyceride added in the treatment process of the liquid organic kitchen waste can provide nutrient substances for strains, so that the strains can better survive and propagate, and the composite microbial inoculum has better deodorization effect on the liquid organic kitchen waste.
On the other hand, the odor threshold of the fermented liquid organic kitchen waste in example 7 is lower than 265, the odor threshold of the fermented liquid organic kitchen waste in example 8 is not higher than 250, and comparing example 1 with example 7, the odor threshold of the fermented liquid organic kitchen waste in example 7 is lower than that of example 1, which indicates that the wheat straw is modified by using 1-pyridin-3-yl-cyclopropylamine to obtain modified wheat straw, the modified wheat straw is used as a carrier, and the modified wheat straw can possibly adsorb some odorous gases of the liquid kitchen waste and is mixed with the composite bacterial powder to prepare the composite microbial agent for treating the liquid organic kitchen waste, so that the odor threshold of the fermented kitchen waste is further reduced; and the odor threshold value of the fermented liquid organic kitchen waste in the embodiment 8 is obviously lower than that of the fermented liquid organic kitchen waste in the embodiments 1 and 4, which shows that the modified wheat straws are used as the carrier of the composite bacterial powder, and the citric acid fatty acid glyceride is added in the kitchen waste treatment process, so that the deodorization effect of the liquid organic kitchen waste is obviously improved.
4. Liquid organic kitchen waste resource utilization performance test
The compost maturity is an important index for evaluating the compost effect so as to obtain humus with a high proportion and further evaluate the recycling effect of kitchen waste; e 4 /E 6 The ratio is a common index for describing the quality of humic acid and the aromatization degree, and can be indirectly used for describing the humification size of compost. Taking liquid organic kitchen waste which is not fermented as a blank control group; the specific experimental method is as follows:
matching the liquid organic kitchen waste after aerobic fermentation with distilled water according to 1g 15mL, horizontally oscillating for 1h at the rotating speed of 250r/min, filtering, and measuring the absorbance ratio (E) of the filtrate at the wavelength of 465nm and 665nm by using a 721 ultraviolet spectrophotometer 4 /E 6 ）。
TABLE 3 liquid organic kitchen wasteAfter fermentation of refuse E 4 /E 6 Value of
As can be seen from Table 3, E for fermented liquid organic kitchen waste in examples 1 to 3 and 9 4 /E 6 The value is higher than 2.8, which shows that the technical scheme of the invention has higher compost humus degree on the liquid organic kitchen garbage, and further obtains the fertilizer which is easy to be absorbed by crops; comparing example 1 with example 9, E of liquid organic kitchen waste after fermentation in example 1 4 /E 6 The value is higher than that in example 9, which shows that the Candida tropicalis, acetobacter aceti Orerlangae subspecies, bacillus megaterium and Candida albicans are used together as composite bacterial powder to be prepared into the composite bacterial agent with the carrier, so that the liquid organic kitchen garbage is treated, and the humification effect of the composite bacterial agent on the liquid organic kitchen garbage is improved; example 4-6E of fermented liquid organic kitchen waste 4 /E 6 Value higher than 4.5, E of fermented liquid organic kitchen waste in comparative example 1 with examples 4-6, examples 4-6 4 /E 6 The value is higher than that of example 1, which shows that the addition of citric acid fatty glyceride in the treatment process of the liquid organic kitchen waste can enable the composite microbial inoculum to have higher fermentation degree on the liquid organic kitchen waste, and further achieve higher decomposition degree. Example 7E of fermented liquid organic kitchen waste 4 /E 6 Value higher than 4, E of liquid organic kitchen waste after fermentation in example 8 4 /E 6 Value higher than 5.5, E of fermented liquid organic kitchen waste comparing example 1 with example 7, example 7 4 /E 6 The value is higher than that of example 1, which shows that the wheat straw is modified by using 1-pyridine-3-cyclopropyl amine to obtain modified wheat straw, and the modified wheat straw is used as a carrier to be mixed with composite bacterial powder to prepare a composite microbial inoculum for treating liquid organic kitchen waste, so that the maturity of the kitchen waste is further improved; and E of fermented liquid organic kitchen waste in example 8 4 /E 6 The value is higher than that of example 1 and example 4, which shows that the modified wheat isThe stalks are used as carriers of the composite bacterial powder, and citric acid fatty glyceride is added in the kitchen waste treatment process, so that the compost maturity of the liquid organic kitchen waste is obviously improved, and a better resource utilization effect is achieved.
The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for treating and recycling liquid organic kitchen waste comprises the following steps:
firstly, screening inorganic matters in the kitchen waste, pulping the residual organic kitchen waste to obtain liquid organic kitchen waste;
uniformly mixing the composite bacterial powder for treating the kitchen waste with a carrier to obtain a composite microbial inoculum;
and uniformly mixing the liquid organic kitchen waste, sawdust and the composite microbial inoculum, performing aerobic fermentation, and determining a product.
2. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the weight ratio of the composite bacterial powder for treating the kitchen waste to the carrier is 1 to 4-9.
3. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the adding amount of the sawdust is 8 to 20 percent of the weight of the liquid organic kitchen garbage.
4. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the aerobic fermentation temperature is 30 to 45 ℃, and the fermentation time is 24 to 72h.
5. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the degradation rate of the liquid organic kitchen waste is higher than 40%.
6. The method for treating and recycling liquid organic kitchen waste according to claim 1, wherein: the kitchen garbage disposal composite bacterial powder at least comprises: candida tropicalis, bacillus stearothermophilus, bacillus cereus, acetobacter aceti Orerlangae subspecies, bacillus megaterium and Candida albicans.
7. The method for liquid organic kitchen waste treatment and resource utilization according to claim 6, wherein: the composite bacteria powder for treating kitchen garbage comprises candida tropicalis, acetobacter aceti Orilan subspecies, bacillus megaterium and candida albicans.
8. The method for liquid organic kitchen waste treatment and resource utilization according to claim 7, wherein: the weight ratio of the candida tropicalis to the acetobacter aceti subspecies, the bacillus megaterium to the candida albicans is 1 to 3.
9. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the number of viable bacteria of the composite bacterial powder for treating kitchen garbage is more than or equal to 5 multiplied by 10 7 CFU/mL。
10. The method for liquid organic kitchen waste treatment and resource utilization according to claim 1, wherein: the adding amount of the composite bacterial powder for treating the kitchen waste is 3-8% of the weight of the liquid organic kitchen waste.
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| CN114940960A (en) * | 2021-07-08 | 2022-08-26 | 安徽全民环保科技有限公司 | Composite microbial preparation for degrading kitchen waste, preparation method and application thereof |
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| CN114940960A (en) * | 2021-07-08 | 2022-08-26 | 安徽全民环保科技有限公司 | Composite microbial preparation for degrading kitchen waste, preparation method and application thereof |
| CN113526998A (en) * | 2021-07-29 | 2021-10-22 | 黄乃坤 | Kitchen waste liquid fertilizer and preparation method and application thereof |
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