A collaborative and full-scale resource processing process for organic waste

Abstract

The present invention discloses a collaborative full-scale resource treatment process for organic waste, the steps of which include solid-liquid separation, liquid treatment and solid residue treatment. The liquid treatment includes taking part of the solid residue and all the liquid in step one at 35±2°C, adding anaerobic microbial agents, and performing anaerobic treatment to obtain biogas and biogas residue; the solid residue treatment includes putting the remaining solid residue and the biogas residue obtained in step two into a degradation device, performing composting treatment, and obtaining organic fertilizer. The present invention can achieve full harmless treatment of organic waste.

Description

Technical Field

[0001] The invention relates to an organic waste treatment process, in particular to an organic waste coordinated full-scale resource treatment process. Background Art

[0002] A large amount of organic waste is generated in life, among which food waste is the most abundant organic waste in the world and the main part of urban domestic waste. Organic waste such as food waste contains extremely high moisture and organic matter, which is easy to rot and produce stench. After proper treatment and processing, it can be converted into new resources. The high organic matter content allows it to be used as fertilizer and feed after strict treatment. It can also produce biogas for fuel or power generation, and the oil part can be used to prepare biofuel. However, in the existing food waste treatment process, the aerobic or anaerobic links cannot be perfectly matched; the existing food waste treatment technology is difficult to achieve full harmless treatment. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a method for achieving full harmless treatment of organic waste such as kitchen waste.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A process for the coordinated and full-scale resource treatment of organic waste, the steps of which are as follows:

[0006] Step 1, solid-liquid separation: the received organic waste is discharged into a crusher for crushing and pulping to obtain slurry, and then the slurry is transferred to a three-phase separator device for solid-liquid-oil separation to obtain solid residue, liquid and crude oil respectively;

[0007] Step 2, liquid treatment: at 35±2°C, take part of the solid residue and all the liquid in step 1, add anaerobic microbial agents, perform anaerobic treatment, and obtain biogas and biogas residue;

[0008] Step 3: solid residue treatment: the remaining solid residue and the biogas residue obtained in step 2 are put into degradation equipment for composting to obtain organic fertilizer.

[0009] The anaerobic microbial agents in step 2 are cellulose decomposing bacteria, lipolytic bacteria, protein hydrolyzing bacteria and methanogens.

[0010] In the step 2, the pH value of the anaerobic treatment is 7.0-7.5; the mass ratio of the cellulose decomposing bacteria, the lipolytic bacteria, the protein hydrolyzing bacteria and the methanogens is 1:(0.5-2):(0.5-2):(3-4); the mass of the partial solid residue is 15-25% of the mass of the liquid.

[0011] The medium-temperature anaerobic treatment in step 2 is to first exhaust the air in the anaerobic fermentation tank, then transfer part of the solid residue and all the liquid into the anaerobic fermentation tank, and ferment at a temperature of 35±2°C for 25-30 days to obtain biogas and biogas residue.

[0012] The composting treatment in step 3 includes: (1) mixing the remaining solid residue and the biogas residue obtained in step 2 evenly and putting them into a degradation device; (2) adding a first degradation bacterial agent and a small amount of biogas slurry and mixing them evenly at 35±2°C to obtain a first degradation mixture; (3) treating the degradation mixture and the second degradation bacterial agent at 35±2°C to obtain a second degradation mixture; and (4) subjecting the second degradation mixture to high-temperature treatment to obtain organic fertilizer.

[0013] The first degradation bacterial agent is two or more of Staphylococcus saprophyticus, Microbacterium esters, Bacillus subtilis, and Stenocytophaga maltophilia.

[0014] The mass of the biogas slurry in step (2) is 10-15% of the mass of the remaining solid residue and the biogas residue obtained in step 2.

[0015] The pH value in the step (2) is 6-8.

[0016] The processing time of step (2) is 1-2 hours.

[0017] The second degradation bacterial agent is two or more of Bacillus licheniformis, Pseudomonas, Lactobacillus salivarius, and Ochrobacterium.

[0018] The pH value in step (3) is 6-8.

[0019] The processing time of step (3) is 1-2 hours.

[0020] The temperature of the high temperature treatment in step (4) is 50-65° C., and the treatment time is 1-2 days.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention provides a collaborative full-scale resource treatment process for organic waste, which is suitable for the treatment of organic waste such as kitchen waste. It mainly includes three steps: solid-liquid separation, liquid treatment and solid residue treatment. The solid residue is added to the anaerobic system for liquid treatment, and the biogas residue produced by the anaerobic system can also enter the aerobic system for solid residue treatment, and finally the full amount is treated harmlessly.

[0023] 2. The present invention synergizes solid residue and biogas residue with the first degradation bacteria agent and the second degradation bacteria agent to effectively degrade the solid residue and biogas residue in the organic waste to produce organic fertilizer. Inoculating the first degradation bacteria agent into the solid residue and biogas residue can effectively reduce the oil content in the solid residue and biogas residue, reduce the situation where oil adheres to the surface of the solid residue and biogas residue to form an oil film, and effectively improve the degradation degree of the solid residue and biogas residue. Inoculating the second decomposition bacteria agent into the decomposition mixture can effectively alleviate the acidification phenomenon of the organic waste, and finally decompose the organic waste into organic fertilizer. The prepared organic fertilizer is rich in soluble sugars, free amino acids and other small molecular substances that can be directly absorbed and utilized by crops, and has good water solubility. It can effectively improve the soil nutrient status and increase crop yields.

[0024] 3. The first degradation bacterial agent of the present invention has good adaptability in the mixture of solid residue and biogas residue and has strong oil-degrading ability. The second degradation bacterial agent added subsequently synergizes with the first degradation bacterial agent to continue to degrade oil, thereby improving the degradation degree of organic waste and enabling the organic waste to be more fully decomposed into organic fertilizer.

[0025] 4. The second degradation bacterial agent of the present invention has the function of degrading small molecular organic acids, can decompose the small molecular organic acids produced by the solid residue during the fermentation process, reduce the acidification degree of the environment, reduce the degree to which the activity of the strain is inhibited by the acidic environment, effectively improve the activity of the strains of the oil-degrading bacterial agent and the acidification-resistant degradation bacterial agent, and improve the degree of degradation. DETAILED DESCRIPTION

[0026] This embodiment provides a process for the coordinated full resource recovery of organic waste, which is suitable for the treatment of organic waste generated in life, especially for the treatment of kitchen waste. Specifically, the steps of the process for the coordinated full resource recovery of organic waste are as follows:

[0027] Step 1, solid-liquid separation: the received organic waste is discharged into a crusher for crushing and pulping to obtain slurry, and then the slurry is transferred to a three-phase separator device for solid-liquid-oil separation to obtain solid residue, liquid and crude oil respectively;

[0028] Step 2, liquid treatment: at 35±2°C, take part of the solid residue and all the liquid in step 1, add anaerobic microbial agents, perform anaerobic treatment, and obtain biogas and biogas residue;

[0029] Step 3: solid residue treatment: the remaining solid residue and the biogas residue obtained in step 2 are put into degradation equipment for composting to obtain organic fertilizer.

[0030] Among them, in step one, the received organic waste is discharged into a crusher for crushing and pulping to obtain a slurry, which may include: receiving organic waste such as food waste, and performing coarse crushing, and draining during the receiving and coarse crushing process to obtain a first part of liquid; then automatically sorting the crushed organic waste to remove non-organic waste, pressing the sorted organic waste to obtain a first part of solid residue, and draining to obtain a second part of liquid; mixing the obtained first part of liquid and the second part of liquid, and then separating oil from water to obtain crude oil, liquid and a second part of solid residue. The crude oil can be stored for industrial use, such as as fuel, and the liquid is used to further produce biogas, etc. After the first part of solid residue and the second part of solid residue are mixed, one part is used for anaerobic fermentation to produce biogas, and the other part is used to prepare organic fertilizer.

[0031] In step 2, at 35±2°C, part of the solid residue and all the liquid in step 1 are taken, and anaerobic microbial agents are added for anaerobic treatment to obtain biogas and biogas residue, wherein part of the solid residue participates in the anaerobic decomposition of the liquid, increases the carbon source, and enables the liquid containing organic matter to be more fully utilized to produce biogas, which can be used for boilers, power generation, etc. Most of the biogas slurry obtained after anaerobic treatment of the liquid can enter the conventional sewage treatment system to achieve the recycling of water, and a small part of the biogas slurry can participate in the process of preparing organic fertilizer from solid residue; the obtained biogas residue participates in the process of preparing organic fertilizer from solid residue.

[0032] In step 3, the remaining solid residue and the biogas residue obtained in step 2 are put into a degradation device for composting to obtain organic fertilizer. The organic fertilizer can also be used alone as nutrient soil for plant growth.

[0033] It can be seen from the above that this embodiment can achieve the full harmless treatment of organic waste and achieve full recycling of organic waste.

[0034] In some examples, the anaerobic microbial agents in step 2 are cellulose decomposing bacteria, lipolytic bacteria, protein hydrolyzing bacteria and methanogens. Cellulolytic bacteria, lipolytic bacteria and protein hydrolyzing bacteria can be existing cellulose decomposing bacteria, lipolytic bacteria and protein hydrolyzing bacteria, respectively, and are used to decompose cellulose, fat and protein in the liquid, respectively. Methanogens are used to promote biogas production.

[0035] In some examples, in step 2, the pH value of the anaerobic treatment is 7.0-7.5, which is conducive to the survival of anaerobic bacteria such as methanogens.

[0036] In some examples, in step 2, the mass ratio of cellulose-decomposing bacteria, lipolytic bacteria, protein-hydrolyzing bacteria and methanogens is 1:(0.5~2):(0.5~2):(3~4), which can work well with the liquid obtained from existing conventional organic waste, and is conducive to better degradation of organic matter and production of biogas.

[0037] In some examples, the mass of the partial solid slag is 15-25% of the mass of the liquid, which can better increase the carbon source of the liquid.

[0038] In some examples, the medium-temperature anaerobic treatment in step 2 is to first exhaust the air in the anaerobic fermentation tank, then transfer part of the solid residue and all the liquid into the anaerobic fermentation tank, and ferment at a temperature of 35±2°C for 25-30 days to obtain biogas, biogas slurry and biogas residue, provide anaerobic conditions as much as possible, and allow the liquid to fully decompose in the anaerobic system to obtain biogas and biogas residue.

[0039] In some examples, the composting treatment in step 3 includes: (1) mixing the remaining solid residue and the biogas residue obtained in step 2 evenly and putting them into the degradation equipment; (2) adding the first degradation bacterial agent and a small amount of biogas liquid at 35±2°C and mixing them evenly to obtain a first degradation mixture; (3) treating the degradation mixture and the second degradation bacterial agent at 35±2°C to obtain a second degradation mixture; (4) subjecting the second degradation mixture to high temperature treatment to obtain organic fertilizer. By carrying out aerobic bacterial treatment in steps and adding biogas liquid to promote the activity and dispersion of fungi and promote oil hydrolysis, the solid residue and biogas residue can be decomposed more completely and the absorbability of organic fertilizer can be improved.

[0040] In some examples, the first degradation bacteria agent is two or more of saprophytic Staphylococcus, ester-fragmented microbacterium, Bacillus subtilis, and maltophilia stenocystis, and the above-mentioned degradation bacteria agent can effectively decompose the grease in the solid residue and biogas residue, and prevent the grease from covering the surface of the solid residue and biogas residue, thereby hindering the degradation of the solid residue and biogas residue. The addition amount of the first degradation bacteria agent can be 0.2-0.6% of the mass of the solid residue and biogas residue to be degraded. The first degradation bacteria agent is preferably a mixture of saprophytic Staphylococcus, ester-fragmented microbacterium, Bacillus subtilis, and maltophilia stenocystis.

[0041] In the related art, common degradation bacteria agents cannot effectively remove the oil film formed on the surface of solid residue and biogas residue of organic waste during the degradation process, which hinders the degradation of solid residue and biogas residue. In this embodiment, the first degradation bacteria agent that can effectively promote oil degradation is inoculated into the solid residue and biogas residue, which can effectively reduce the oil content in the organic waste liquid, reduce the situation where oil adheres to the surface to form an oil film, and effectively improve the degradation degree of solid residue of organic waste.

[0042] In some examples, the mass of the biogas slurry in step (2) is 2-5% of the mass of the remaining solid residue and the biogas residue obtained in step 2. The water content of the remaining solid residue and the biogas residue obtained in step 2 is not higher than 2% (mass). By adding a certain amount of biogas slurry, the water content of the solid residue and the biogas residue can be further increased, the degree of degradation of the solid residue and the biogas residue can be improved, and the water content of the organic fertilizer finally obtained can be moderate. At the same time, the further utilization of the biogas slurry is also achieved. The organic matter, enzymes, etc. in the biogas slurry can increase the nutrients in the organic fertilizer.

[0043] In some examples, the pH value in step (2) is 6-8, and the desired pH value can be obtained by adding a conventional pH adjuster. The first degradation bacterial agent can have better activity within the above pH range.

[0044] In some examples, the processing time of step (2) is 1-2 hours, so that substances such as oil and fat in the solid residue and biogas residue can be fully decomposed.

[0045] In some examples, the second degradation bacteria agent is two or more of Bacillus licheniformis, Pseudomonas, Lactobacillus salivarius, and Ochrobacterium, and the above-mentioned degradation bacteria agent can further decompose substances such as oils, sugars, and proteins, and can also degrade acidic substances to avoid acidification of organic fertilizer during the preparation process, such as high temperature treatment. The addition amount of the second degradation bacteria agent can be 0.2-0.6% of the mass of the solid residue and biogas residue to be degraded. The second degradation bacteria agent is preferably a mixture of Bacillus licheniformis, Pseudomonas, Lactobacillus salivarius, and Ochrobacterium.

[0046] In the related art, common degradation bacteria will inhibit NH 3 and H 2 S emission, but there is usually an acidification problem in the preparation process of organic waste organic fertilizer, which will inhibit the degradation of organic waste. Therefore, the second degradation bacterial agent is inoculated in the solid residue and biogas residue to effectively alleviate the acidification phenomenon. At the same time, the acid-resistant second degradation bacterial agent can accelerate the utilization rate of total sugar and reducing sugar, and help convert crude protein in organic waste into free amino acids, so that the prepared organic fertilizer is rich in soluble sugars, free amino acids and other small molecules that can be directly absorbed and utilized by crops, and has good water solubility. It can effectively improve soil nutrient conditions and increase crop yields.

[0047] In some examples, the pH value in step (3) is 6-8, and the desired pH value can be obtained by adding a conventional pH adjuster. The second degradation bacterial agent can have better activity within the above pH range.

[0048] In some examples, the processing time of step (3) is 1-2 hours, so that the fats, sugars, proteins and other substances in the solid residue and biogas residue can be fully decomposed.

[0049] In some examples, the temperature of the high temperature treatment in step (4) is 50-65° C. and the treatment time is 1-2 days, so that the solid residue and biogas residue are further decomposed.

[0050] The present invention will be further described in detail below through specific examples. In the examples, the temperature and pressure are not particularly emphasized, all are at room temperature and pressure, and the materials used are not particularly distinguished and are the same materials. In the following examples, the steps of step 1 and step 2 are the same, and the steps of step 3 are different except for the different sterilization methods, and the other steps are basically the same.

[0051] The specific preparation methods of the following embodiments are as follows:

[0052] Step 1: Collect the organic waste (kitchen waste) and perform coarse crushing, and drain the liquid during the collection and coarse crushing process to obtain the first part of liquid; then automatically sort the crushed organic waste to remove non-organic waste, press the sorted organic waste to obtain the first part of solid residue, and drain the liquid to obtain the second part of liquid; mix the first part of liquid and the second part of liquid, then separate oil and water to obtain crude oil, liquid and the second part of solid residue, and mix the first part of solid residue and the second part of solid residue.

[0053] Step 2, liquid treatment: at 35±2℃, take part of the solid residue and all the liquid in step 1, the amount of solid residue added is 20% of the mass of all the liquid, and add anaerobic microbial agents, the amount of anaerobic microbial agents is 5% of the total mass of part of the solid residue and all the liquid, and the anaerobic microbial agents are cellulose decomposing bacteria, fat decomposing bacteria, protein hydrolyzing bacteria and methanogens in a mass ratio of 1:1:1:3. Exhaust the air in the anaerobic fermentation tank, then transfer part of the solid residue, all the liquid and anaerobic microbial agents into the anaerobic fermentation tank, ferment for 25 days at a pH range of 7.3±0.2 and a temperature of 35±2℃ to obtain biogas, biogas liquid and biogas residue.

[0054] Step 3: Solid residue treatment: The remaining solid residue, all the biogas residue obtained in step 2 and part of the biogas liquid are put into the degradation equipment for composting treatment. The specific steps are as follows:

[0055] (1) Evenly mix the remaining solid residue and the biogas residue obtained in step 2, and put them into the degradation equipment;

[0056] (2) At 35±2°C, add the first degradation bacterial agent and a small amount of biogas liquid to the remaining solid residue and all the biogas residue obtained in step 2 and mix them evenly for reaction. The mass of the biogas liquid is 5% of the mass of the remaining solid residue and the biogas residue obtained in step 2. The first degradation bacterial agent is a mixture of saprophytic Staphylococcus, Microbacterium esters, Bacillus subtilis and Stenocystis maltophilia. The addition amount of the first degradation bacterial agent relative to the remaining solid residue and all the biogas residue obtained in step 2 is shown in Table 1 below. The mixture is treated at a pH of 7.2±0.2 for 2 hours to obtain a first degradation mixture.

[0057] (3) Adding a second degradation bacterial agent to the first degradation mixture at 35±2°C, wherein the second degradation bacterial agent is a mixture of Bacillus licheniformis, Pseudomonas, Lactobacillus salivarius, and Ochrobacterium sphaeroides, and the amount of the first degradation bacterial agent added relative to the total mass of the remaining solid residue and all the biogas residue obtained in step 2 is as shown in Table 1 below, and treating for 2 hours at a pH value of 7.8±0.2 to obtain a second degradation mixture;

[0058] (4) subjecting the second degradation mixture to a high temperature treatment at 55±3° C. for 1 day to obtain an organic fertilizer.

[0059] Table 1 below shows the dosage data of the first degradation bacterial agent and the second degradation bacterial agent in Examples 1-3.

[0060]

[0061] The first degradation bacterial agent and the second degradation bacterial agent of the present invention are tested according to GB15193.3 and GB / T4789.28, and it is confirmed that the bacterial agents have genetic stability, the strains are effective and are safe and harmless to the environment.

[0062] Comparative Example 1

[0063] In comparative example 1, step 1 and step 2 of the preparation method are the same as the preparation steps of the above-mentioned embodiments 1-3, and the dosage of the first degradation bacteria agent and the second degradation bacteria agent is the same as that of embodiment 3, but the specific steps of step 3 are as follows: the first degradation bacteria agent, the second degradation bacteria agent and a small amount of biogas liquid are added to the remaining solid residue and all the biogas residue obtained in step 2, and the mixture is mixed and reacted uniformly, the mass of the biogas liquid is 5% of the mass of the remaining solid residue and the biogas residue obtained in step 2, and the temperature is gradually raised to 55±3°C within 4 hours, and then treated at a high temperature of 55±3°C for 1 day to obtain organic fertilizer.

[0064] 1. Oil degradation rate detection

[0065] Take equal amounts of the solid residue remaining at the beginning of step 3 in Examples 1-3 and Comparative Example 1 and all the biogas residue obtained in step 2 and divide them into three beakers, add water and emulsifier, perform ultrasonic vibration and add petroleum ether for preliminary extraction, and obtain the initial oil content W 1Take the first degradation mixture obtained in step 3 (2) of Example 1-3, take an equal amount of sample of the same mass as the above and divide it into three other beakers, add water and emulsifier, ultrasonically vibrate and add petroleum ether for preliminary extraction to obtain the intermediate oil content W 2 Take the second degradation mixture obtained in step 3 (3) of Example 1-3, take an equal amount of sample of the same mass as the above and divide it into three other beakers, add water and emulsifier, ultrasonically vibrate and add petroleum ether for preliminary extraction to obtain the intermediate oil content W 3 Take the organic fertilizers obtained in Examples 1-3 and Comparative Example 1 and take equal amounts of samples of the same mass as above and divide them into three other beakers, shake them at a constant temperature and add petroleum ether for preliminary extraction to obtain the final oil content W in the organic fertilizer. 4 The oil content was obtained by measuring the ultraviolet absorption value of the extract using an ultraviolet spectrophotometer. Each group was tested twice. The calculation formula for the first intermediate oil degradation rate is: P / %=(W 1 -W 2 ) / W 1 *100, the second intermediate oil degradation rate calculation formula is: P / %=(W 1 -W 3 ) / W 1 *100, the final oil degradation rate calculation formula is: P / %=(W 1 -W 4 ) / W 1 *100.

[0066] The test results of the oil degradation rate are shown in Table 2 below.

[0067]

[0068] As shown in Table 2, the oil degradation rates of Examples 1 and 2 are large, indicating that the oil degradation bacteria agent has a good effect on oil degradation. Compared with Comparative Example 1, there is a significant difference in the oil degradation rate of Examples 1-3, and the first intermediate oil degradation rate of the examples is higher than the final oil degradation rate of the comparative example, indicating that the first degradation bacteria agent and the second degradation bacteria agent have good adaptability and strong oil decomposition ability in the step-by-step treatment of solid residue and biogas residue of the present invention. In addition, Comparative Example 1 still has a certain oil degradation effect by adding the degradation bacteria agent once, but it is far less than Examples 1-3 of the present invention, indicating that the liquid will also degrade oil during the fermentation process of the mixed bacteria agent, but the degree of degradation is low.

[0069] From the comparison of the first intermediate oil degradation rate, the second intermediate oil degradation rate, and the final oil degradation rate in the above table, it can be seen that the second degradation agent also has a certain oil degradation effect. After the first degradation agent degrades the liquid to a certain extent, the added second degradation agent synergizes with the first degradation agent to continue to degrade the oil in the liquid phase, thereby accelerating the degradation of solid residue and biogas residue, so that organic waste can be more fully decomposed into organic fertilizer. It also shows that high temperature treatment can further degrade oil.

[0070] 2. Degradation rate of organic solid matter

[0071] The degradation rate of organic solid matter can be tested simultaneously with the degradation rate of oil and fat.

[0072] Take equal amounts of the solid residue remaining at the beginning of step 3 in Examples 1-3 and Comparative Example 1 and all the biogas residue obtained in step 2 and divide them into three beakers, add water and an emulsifier, perform ultrasonic vibration, and add petroleum ether for preliminary extraction. Wash the remaining solid and dry it to obtain a solid mass M 1 Take the first degradation mixture obtained in step 3 (2) of Example 1-3, take an equal amount of sample of the same mass as the above and divide it into three other beakers, add water and emulsifier, ultrasonically vibrate and add petroleum ether for preliminary extraction, wash the remaining solid and dry it to obtain a solid mass M 2 Take the second degradation mixture obtained in step 3 (3) of Example 1-3, take an equal amount of sample of the same mass as the above and divide it into three other beakers, add water and emulsifier, ultrasonically vibrate and add petroleum ether for preliminary extraction, wash the remaining solid and dry it to obtain a solid mass M 3 Take the organic fertilizers obtained in Examples 1-3 and Comparative Example 1 and take equal amounts of samples of the same mass as above into three other beakers, shake at a constant temperature and add petroleum ether for preliminary extraction, wash the remaining solids and dry them to obtain a solid mass M 4 Each group was tested twice. The formula for calculating the degradation rate of the first intermediate organic solid matter is: P / %=(M 1 -M 2 ) / M 1 *100, the second intermediate organic solid matter degradation rate calculation formula is: P / %=(M 1 -M 3 ) / M 1 *100, the final organic solid matter degradation rate calculation formula is: P / %=(M 1 -M 4 ) / M 1 *100.

[0073] The test results of the degradation rate of organic solid matter are shown in Table 3 below.

[0074]

[0075] As can be seen from Table 3, the organic matter degradation of Examples 1-3 is obvious, while the degradation effect of Comparative Example 1 is much lower than that of the embodiment of the present invention. Through the analysis of the degradation rate of the first intermediate organic solid matter, the degradation rate of the second intermediate organic solid matter and the final organic solid matter degradation rate, it can be seen that the second degradation bacteria agent has good degradation and utilization efficiency for organic matter. After inoculating the second acid-resistant degradation bacteria agent, each group first degrades part of the macromolecular organic matter into small molecule soluble substances, and then the microorganisms use the organic matter for cell proliferation. The acid-resistant degradation bacteria agent easily absorbs and utilizes the soluble small molecules in the organic waste to synthesize new cells, promotes the growth and reproduction of microorganisms, thereby improving the degree of degradation. In addition, the acid-resistant degradation bacteria agent has the function of degrading small molecule organic acids, can quickly decompose the small molecule organic acids produced by the liquid phase during the fermentation process, avoids the inhibition of the strain activity of the oil-degrading bacteria agent and the acid-resistant degradation bacteria agent caused by the acidification of the fermentation environment, and effectively improves the degradation efficiency.

[0076] The above implementation modes cannot limit the protection scope of the present invention. The equivalent modifications and changes made by those skilled in the art without departing from the overall concept of the present invention are still within the scope of the present invention.

Claims

1. A collaborative full-scale resource treatment process for organic waste, wherein the organic waste is kitchen waste, characterized in that The steps are as follows: Step 1, solid-liquid separation: the organic waste is collected and roughly crushed, and the collection and roughly crushing process is performed simultaneously to drain to obtain a first part of liquid; then the crushed organic waste is automatically sorted to remove non-organic waste, the sorted organic waste is pressed to obtain a first part of solid residue, and drained to obtain a second part of liquid; the first part of liquid and the second part of liquid are mixed, and then oil-water separation is performed to obtain crude oil, liquid and a second part of solid residue, and the first part of solid residue and the second part of solid residue are mixed to obtain solid residue; Step 2, liquid treatment: at 35±2°C, take part of the solid residue and all the liquid in step 1, add anaerobic microbial agents, perform anaerobic treatment, and obtain biogas, biogas slurry and biogas residue; the anaerobic microbial agents are cellulolytic bacteria, lipolytic bacteria, protein hydrolytic bacteria and methanogens, and the pH value of anaerobic treatment is 7.0-7.5; the mass ratio of the cellulolytic bacteria, the lipolytic bacteria, the protein hydrolytic bacteria and the methanogens is 1:(0.5-2): (0.5-2): (3-4); the mass of the part of the solid slag is 15-25% of the mass of the liquid; Step 3, solid residue treatment: the remaining solid residue, all the biogas residue obtained in step 2 and part of the biogas liquid are put into a degradation device for composting to obtain organic fertilizer. The specific steps are: (1) the remaining solid residue and all the biogas residue obtained in step 2 are mixed evenly and put into a degradation device; (2) at 35±2°C, a first degradation bacterial agent and a small amount of biogas liquid are added to the remaining solid residue and all the biogas residue obtained in step 2 and mixed evenly to obtain a first degradation mixture; (3) at 35±2°C, a second degradation bacterial agent is added to the first degradation mixture for treatment to obtain a second degradation mixture; (4) the second degradation mixture is subjected to high temperature treatment to obtain organic fertilizer; The first degradation bacterial agent is a mixture of Staphylococcus saprophyticus, Microbacterium esters, Bacillus subtilis and Stenocystis maltophilia; the mass of the biogas slurry in step (2) is 2-5% of the mass of the remaining solid residue and the total biogas residue obtained in step 2; the pH value in step (2) is 6-8; The second degradation bacterial agent is a mixture of Bacillus licheniformis, Pseudomonas, Lactobacillus salivarius and Ochrobactrum; the pH value in step (3) is 6-8.

2. The organic waste coordinated full resource treatment process according to claim 1 is characterized in that The anaerobic treatment step in step 2 is to first exhaust the air in the anaerobic fermentation tank, then transfer part of the solid residue and all the liquid into the anaerobic fermentation tank, and ferment for 25-30 days at a temperature of 35±2°C to obtain biogas, biogas liquid and biogas residue.

3. The organic waste coordinated full resource treatment process according to claim 1 or 2, characterized in that The reaction time of step (2) is 1-2 hours.

4. The organic waste coordinated full resource treatment process according to claim 1 or 2, characterized in that The processing time of step (3) is 1-2 hours.

5. The organic waste coordinated full resource treatment process according to claim 1 or 2, characterized in that The high temperature treatment in step (4) is performed at a temperature of 50-65° C. and for a treatment period of 1-2 days.

Images