CN112191653A - Garbage classification and treatment method - Google Patents
Garbage classification and treatment method Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
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- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a garbage classification and treatment method, which at least comprises front-end treatment, transfer center treatment, sorting by a sorting center, utilization by a renewable resource center and tail end treatment; in the front-end process, a garbage classification area is divided into a first area where a first garbage classification method is performed and a second area where a second garbage classification method is performed, wherein the first garbage classification method divides garbage into dry garbage, wet garbage, and harmful garbage, and the second garbage classification method divides garbage into recyclable garbage, other garbage, pre-meal garbage, post-meal garbage, and harmful garbage. The invention inherits the garbage treatment concept of 'dividing and dividing into necessary for use', realizes the classification of the maximum utilization of garbage, benefits the classification mode, ensures higher acceptance of common people, and realizes the reduction of garbage sources and the reclamation and harmlessness of the garbage.
Description
Technical Field
The invention relates to the field of garbage treatment, in particular to a garbage classification and treatment method.
Background
At present, most areas in China adopt four categories of garbage, namely recyclable garbage, wet garbage (kitchen garbage), other garbage and harmful garbage. The wet garbage (kitchen garbage) is conveyed to a kitchen garbage treatment plant, and after pretreatment, anaerobic digestion is carried out to produce methane, or the wet garbage (kitchen garbage) is directly conveyed to a garbage incineration plant for cooperative treatment. The garbage can be recovered by sorting, and other garbage can be directly sent to a garbage incineration treatment plant or landfill treatment. In order to help people understand how to classify, classification instruction manuals are provided from different places, the difficulty is that the definitions of wet garbage and other garbage are crossed, people are difficult to distinguish, classification errors are caused, manual re-sorting is needed after the garbage is detected when the garbage is thrown, and the environment is severe, time-consuming and labor-consuming.
The garbage delivery adopts a four-classification method, so that the classification effect difference of different regions is huge. Some regions do not perform well. The classification mode of wet garbage (kitchen garbage) does not consider the type selection and the applicability of a rear-end processing technology, and classification is carried out for classification, so that the capacity of rear-end facilities is insufficient, the pretreatment process is long, and the investment is large; the pretreated solid slag returns to the waste incineration plant for cooperation, and the comprehensive utilization efficiency is not high.
The existing classification standard takes uncooked before-meal garbage and cooked after-meal garbage as kitchen garbage, the garbage can be sent to a kitchen garbage disposal plant, and the residual residues after the disposal and the part of the kitchen garbage which can not be disposed by the kitchen garbage disposal plant enter a garbage incineration plant for incineration disposal. And (3) all other types of garbage are sent to a garbage incineration plant for incineration, wherein part of the garbage which is not separated and can be recycled can be incinerated, such as plastic, paper and the like, and the maximum utilization of resources is not realized.
Therefore, the existing garbage classification and treatment methods have various problems and need to be improved.
Disclosure of Invention
The invention provides a garbage classification and treatment method for solving the existing problems, which at least comprises front-end treatment, transfer center treatment, sorting by a sorting center, utilization of a renewable resource center and tail end treatment;
in the front-end process, a garbage classification area is divided into a first area where a first garbage classification method is performed and a second area where a second garbage classification method is performed, wherein the first garbage classification method divides garbage into dry garbage, wet garbage, and harmful garbage, and the second garbage classification method divides garbage into recyclable garbage, other garbage, pre-meal garbage, post-meal garbage, and harmful garbage.
Optionally, the garbage classification section is divided into the first area and the second area according to a region development degree and a residential life habit.
Optionally, in the first waste classification method, the dry waste is further classified into recyclable waste and other waste.
Optionally, in the transit center location, the recyclable waste is centrally deconstructed and shredded and transported with the other waste to a sorting center; and/or
And conveying the pre-meal garbage and the post-meal garbage to the transfer center, and performing bag breaking, dehydration, compression treatment and the like.
Optionally, in the sorting center sorting, the recyclable waste and the other waste are sorted to separate renewable resources.
Optionally, the recyclable waste is mechanically automatically sorted by at least one of magnetic field, gravity, optical spectrum and density to obtain at least one of plastic, glass, metal, waste paper and composite packaging; and/or
The sorting of other rubbish is with machine letter sorting as main, manual work letter sorting as the assistance to sorting out and carrying to renewable resources center with recoverable rubbish, the burning factory of remaining rubbish is sent to and is burnt.
Optionally, in the renewable resource center utilization, renewable resources are processed and sold for recyclable waste or raw materials are provided for renewable resources industries.
Optionally, in the tip centering, at least one of the following processes is included:
carrying out aerobic composting and harmless treatment on the pre-meal garbage;
lactic acid bacteria in the domesticated pre-meal garbage are screened, expanded and cultured to extract lactic acid, and polylactic acid is synthesized to be used as a raw material of the degradable garbage bag;
directly recovering the pre-meal garbage to be used as feed;
carrying out microbial fermentation and drying to obtain the biological protein raw material.
Optionally, in the tip centering, at least one of the following processes is included:
pretreating the postprandial garbage, separating water and oil to obtain crude oil, and pulping the rest of the crude oil and the crude oil, and then feeding the rest of the crude oil and the crude oil into an anaerobic fermentation system to generate methane;
and directly sending the postprandial waste to a waste incineration power plant for co-treatment.
Optionally, the method further comprises performing harmless landfill of the front end treatment, the transfer center disposal, the sorting center sorting, the renewable resource center utilization, and the non-utilizable value waste and sludge produced in the terminal end.
The invention provides a method for classifying and treating garbage from a source to a tail end, which classifies the garbage after the garbage is classified from the source, and treats the classified garbage in a targeted manner by combining corresponding technical means of a rear end, thereby realizing the maximum utilization of resources and conforming to the circular economy concept.
The invention inherits the garbage treatment concept of 'dividing and dividing into necessary for use', realizes the classification of the maximum utilization of garbage, benefits the classification mode, ensures higher acceptance of common people, and realizes the reduction of garbage sources and the reclamation and harmlessness of the garbage.
According to the invention, the kitchen waste is further divided into the before-meal waste and the after-meal waste, different treatment technologies are adopted according to different material characteristics, the utilization diversity of the kitchen waste is expanded, and the resource waste is reduced.
The invention has the advantages that:
(1) according to local conditions, different classification methods are adopted in different areas, a three-classification method for garbage is adopted in underdeveloped areas, a five-classification method for garbage is adopted in developed areas according to conditions, and garbage classification is promoted step by step.
(2) The kitchen waste is simple and easy to classify, treatment technology is optimized according to different incoming materials, treatment difficulty is reduced, and resources are effectively utilized.
(3) The kitchen garbage is divided into pre-meal garbage and post-meal garbage. The pre-meal garbage has good quality, no oil, no salt and less impurities, and can be used for efficiently preparing organic fertilizers, soil conditioners and the like, or domesticating and expanding lactic acid bacteria, extracting and synthesizing polylactic acid to prepare degradable garbage bags and the like.
(4) The recyclable garbage is recycled and sorted, so that the renewable resources are utilized. Sorting other garbage again, sorting by machine is main, sorting by manual work is auxiliary, sorting out renewable resources in other garbage, promoting the recoverable quantity of dry garbage, and realizing cyclic utilization of resources.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
fig. 1 is a flowchart illustrating a garbage classification and processing method according to an embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
It is to be understood that the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like reference numerals refer to like elements throughout.
It will be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.
Spatial relational terms such as "under," "below," "under," "above," "over," and the like may be used herein for convenience in describing the relationship of one element or feature to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
Embodiments of the invention are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of the invention. As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the invention should not be limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the present invention.
In order to provide a thorough understanding of the present invention, detailed steps and detailed structures will be set forth in the following description in order to explain the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
There are several improved methods for the above-mentioned problems of waste classification, but there are also various drawbacks, such as separating the waste into dry waste and wet waste in one treatment method, and further sorting the dry waste into recyclable waste, other waste and harmful waste by hand. The method has low compost utilization rate in wet garbage treatment, and consumes large manpower resources in dry garbage treatment. In another kitchen waste treatment process, kitchen waste is sorted, solid-liquid separated, fermented and dried to obtain particles, and the particles are raised with insects. In another method for treating the kitchen waste by the earthworms, impurities in the kitchen waste are removed, deoiling and desalting treatment is carried out, and then the earthworms are sowed for propagation. The method has high requirements on the pretreatment of the kitchen waste and low cost performance. In another method for preparing living feed for culturing firefly, the snail feed is prepared from grain powder, calcium powder, Toosendan, glucose and domestic garbage; the domestic garbage in the feed refers in particular to waste vegetables and fruits, and the method has the advantages of complex procedure, high cost, limited applicability and no popularization condition.
In order to solve the above problems, the present invention provides a garbage sorting and processing method, as shown in fig. 1, the garbage sorting and processing method includes front-end processing, transfer center disposal, sorting center sorting, recycling resource center utilization, and end disposal.
Each of the steps is described in detail below with reference to fig. 1. First, in the front-end process, a garbage classification area is divided into a first area where a first garbage classification method is performed and a second area where a second garbage classification method is performed, wherein the first garbage classification method divides garbage into dry garbage, wet garbage, and harmful garbage, and the second garbage classification method divides garbage into recyclable garbage, other garbage, pre-meal garbage, post-meal garbage, and harmful garbage.
Specifically, in one embodiment of the present invention, different regions and cities are classified into a first region and a second region according to local development and residential life habits, a three-in-one classification method of classifying garbage into dry garbage, wet garbage and harmful garbage is adopted in the first region, and a five-in-one classification method of classifying garbage into recyclable garbage, other garbage, pre-meal garbage, post-meal garbage and harmful garbage is adopted in the second region.
The classification mode conforms to the actual situation and increases the participation enthusiasm of residents.
In addition, the classification mode of one-to-five or one-to-three can be selected according to the living habits of local residents, and the classification mode can be selected and formulated according to the actual conditions of the local residents.
The classification method of the invention adopts a classification method of garbage into three and five according to local conditions, and the household garbage is classified into dry garbage, wet garbage and harmful garbage according to three classification standards in underdeveloped areas. The developed area is further refined according to the five classification standard which is the three classification, and the domestic garbage is classified into recoverable garbage, other garbage, pre-meal garbage, post-meal garbage and harmful garbage. According to the regional development degree and the residential living habits, two different garbage classification methods are adopted, the two classification methods are the same flow and are easy to excessively advance, and finally, five garbage classification methods are adopted according to the subsequent visual regional development condition, so that the maximum utilization of resources is realized.
The kitchen waste is further classified according to the living habits of residents and the characteristics of the waste, the kitchen waste is divided into the kitchen waste and the postprandial waste, the kitchen waste has high usable value and can be completely recycled, and compared with the four classification methods, the kitchen waste is not subdivided, the kitchen waste and the postprandial waste are merged into the kitchen waste and are treated according to the kitchen waste.
In one embodiment of the invention, the kitchen garbage is divided into pre-meal garbage and post-meal garbage, and the pre-meal garbage has good quality, no oil, no salt and less impurities, and can be used for efficiently preparing organic fertilizers, soil conditioners and the like, or domesticating and expanding lactic acid bacteria, extracting and synthesizing polylactic acid and preparing degradable garbage bags and the like. The method is simple and easy to separate, optimizes the treatment technology according to different incoming materials, reduces the treatment difficulty and effectively utilizes resources.
In the embodiment of the invention, the pre-meal garbage is kitchen garbage without oil salt and other seasonings and without cooking, and comprises vegetable leaf and vegetable sides, fruit peels, livestock and poultry viscera, bagasse, tea leaves and the like, vegetable leaf and vegetable sides generated in daily life of residents, melon and fruit skins and waste materials generated in the food treatment process; food processing mechanisms, unit catering, food service mechanisms for processing food processing residues, fruit and vegetable juice residues and the like generated in the food processing process; vegetables, melons, fruits, garbage, aquatic products and the like produced by farmer markets and agricultural product wholesale plants. The food waste after meal is kitchen waste cooked by oil and sauce, and comprises leftovers, bone and fish bones, overdue food processing finished products and the like. Wherein the pre-meal waste and the post-meal waste are not limited to the categories listed in the above examples.
In the transit center disposal step, the recyclable waste and other waste are mainly pretreated for subsequent sorting.
Specifically, in one embodiment of the invention, the recyclable garbage and other garbage are transported to a transfer center by a cleaning and transporting vehicle, and after being intensively disassembled and crushed, the large recyclable garbage and other recyclable garbage are transported to a sorting center together. The pre-meal garbage and the post-meal garbage are conveyed to a transfer center, and are intensively subjected to bag breaking, dehydration and compression, so that the occupied space and the weight are reduced.
In the step of sorting by the sorting center, the recyclable garbage and other garbage are further sorted, so that the recyclable garbage is sorted and utilized, the usable parts in the other garbage are separated and presented, the utilization rate of the garbage is improved, and the landfill amount and the incineration amount of the garbage are reduced.
Specifically, the recyclable garbage is automatically sorted by a mechanical sorting device through at least one means of magnetic field, gravity, spectrum and density to obtain plastic, glass, metal, waste paper, composite packages and the like.
And for other garbage to be intensively sorted in the sorting center, the machine sorting is mainly used, the manual sorting is used as the assistance, the recyclable garbage is sorted out and enters a rear-end renewable resource center, and the rest garbage is conveyed to a garbage incineration plant for incineration.
For example, in one embodiment of the invention, the sorting center is provided with a metal detector to detect and sort. The sorting center arrangement may further include: the intelligent detection equipment 4 is not limited to any one or combination of X-ray detection, microwave detection, infrared detection, sound wave detection, hyperspectral imaging detection, ultrasonic imaging and visual imaging, and ensures advanced, efficient, accurate and reliable identification technology so as to effectively sort garbage.
In the step of utilizing the renewable resource center, the recyclable garbage classified into categories and recyclable parts in other garbage are sent to the renewable resource center together, so that the processing and selling of renewable resources are realized, or raw materials are provided for renewable resource industries.
In the tail end disposal step, the pre-meal garbage and the post-meal garbage are respectively treated, wherein the pre-meal garbage can be used as a soil conditioner, an organic fertilizer, a decaying animal feed, a protein feed, a raw material for extracting lactic acid and the like. The method is environment-friendly, improves the resource utilization rate and the mode, reduces the amount of incineration and landfill, realizes reasonable and maximized resource utilization, and reduces the cost performance of rear-end disposal.
In one embodiment of the invention, the pre-meal waste can be transported to a composting center, subjected to aerobic composting after simple pretreatment, and subjected to crushing, mixing, fermentation and decomposition. Wherein the composting refers to a biochemical process for controllably promoting the conversion of degradable organic matters in the solid wastes into stable humus by utilizing microorganisms widely existing in the nature. In the process, animal and plant residues are mineralized, humified and innoxious by using the action of microorganisms, and germ and insect eggs in raw materials are killed by using high temperature generated in the composting process to achieve the purpose of harmlessness.
In another embodiment, organic fertilizer or soil conditioner and the like can be obtained through different composting time, element addition and the like.
In another embodiment, lactic acid bacteria in the pre-meal garbage can be selected and domesticated, and then the lactic acid can be extracted by propagation to synthesize polylactic acid as a raw material of the degradable garbage bag.
The pre-meal garbage is natural in ingredients, so that no oil salt sauce is available, and the pre-meal garbage can also provide food for rancid animals. The snails and the earthworms are rotten animals, cells lose water when the snails and the earthworms meet salt, and the garbage before meals does not contain salt, so that the snails and the earthworms are the food raw materials with the highest cost performance for feeding the snails and the earthworms. Feeding snail can provide bait for fishing, and can extract snail bio-enzyme and snail mucus from breeding snail. The earthworm breeding before meals is combined with the subsequent earthworm treatment to obtain dried earthworm, and the animal protein is extracted. In addition, the garbage before meal can also be used for breeding hermetia illucens, yellow mealworms, white star chafers, ground beetles and the like.
The pre-meal garbage can also be used for microbial fermentation and drying to obtain a biological protein raw material, and is safe to be used in livestock and poultry feed.
Pretreating the postprandial garbage, separating water from oil, directly selling the obtained crude oil, and pulping the other parts to enter an anaerobic fermentation system to generate methane; or directly sending the waste to a waste incineration power plant for cooperative treatment.
The garbage, waste residue and the like which have no utilization value and are generated in each treatment step can be sent to a landfill site for harmless landfill.
The invention provides a garbage classification method, which achieves the aim of maximizing resource utilization, and designs a five-point one-line mode, namely, processes of garbage collection, transfer, sorting, regeneration and disposal are adopted, so that the harmlessness, the resource utilization and the reduction of garbage are realized. From the source, residents divide the garbage into five types and throw the five types of garbage into the respective garbage cans, and then transport the five types of garbage respectively. The recyclable garbage, other garbage, the pre-meal garbage and the post-meal garbage are firstly respectively transported to a garbage transfer center, the recyclable garbage and the other garbage are respectively transferred in a centralized way, and the pre-meal garbage and the post-meal garbage are respectively compressed and dehydrated to reduce the volume. Then the sorting center sorts the recyclable garbage and other garbage and separates the renewable resources. The renewable resource center circularly processes the renewable resources separated by the sorting center. And respectively performing resource utilization maximization treatment on the pre-meal garbage and the post-meal garbage. And finally, the residual residues of various wastes are sent to a waste incineration power plant for incineration power generation, harmful wastes are sent to a hazardous waste treatment plant, and waste residues are subjected to centralized harmless treatment. The whole process comprises front-end treatment, transfer center, sorting center, renewable resource center and tail-end treatment, wherein a total of five parts form a garbage treatment closed loop, and five types of garbage are respectively transported and treated, so that the classification and treatment of the garbage are rationalized, recycled and utilized to the maximum.
The invention has the advantages that:
1. the garbage classification standard is based on local conditions, and the classification standard of garbage classified into three, one and five is progressively adopted. The method improves the acceptance of residents and has the advantage of easy participation.
2. Redefining the wet garbage classification standard, taking before meal and after meal as the wet garbage classification standard, not only ensuring easy acceptance and classification of residents, but also improving the utilization of kitchen garbage/wet garbage, optimizing the treatment technology and reducing the treatment difficulty.
3. The pre-meal garbage refers to uncooked kitchen garbage without various seasonings such as oil, salt and the like. The pre-meal garbage has good quality, no oil, no salt, less impurities and low pollution emission in the treatment process. The invention separates the garbage before meals as the large class of garbage classification, and fully utilizes the garbage. If not separated, the garbage can be transported to a garbage power plant together with the postprandial garbage for incineration power generation, thereby increasing the load of the power plant and increasing the cumulative pollution emission. The invention divides the whole garbage into five categories, the resources are utilized to the maximum extent, and each category of garbage is treated respectively, so that the related pollution emission is minimum.
4. The invention further classifies the dry garbage, separates all recoverable resources in the dry garbage, directly classifies and sorts the recoverable garbage, and further sorts out the available resources from other garbage, thereby avoiding resource waste, recycling the resources, increasing the recoverable amount of the garbage and reducing the incineration amount of the garbage.
5. The whole garbage treatment process is highly cooperative, the treatment of the previous step is based on the following treatment process, the front-end classification method is reversely pushed in an optimal tail-end treatment mode, the classification is reasonable, the treatment process is short, and the resource utilization is maximized.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A garbage classification and treatment method is characterized in that the garbage classification and treatment method at least comprises front-end treatment, transfer center treatment, sorting by a sorting center, utilization of a renewable resource center and tail end treatment;
in the front-end process, a garbage classification area is divided into a first area where a first garbage classification method is performed and a second area where a second garbage classification method is performed, wherein the first garbage classification method divides garbage into dry garbage, wet garbage, and harmful garbage, and the second garbage classification method divides garbage into recyclable garbage, other garbage, pre-meal garbage, post-meal garbage, and harmful garbage.
2. The garbage sorting and processing method according to claim 1, wherein the garbage sorting region is divided into the first region and the second region according to a regional development degree and a residential life habit.
3. The method of sorting and processing waste according to claim 1, wherein in the first waste sorting method the dry waste is further separated into recoverable waste and other waste.
4. A method for sorting and processing waste according to claim 3, characterized in that in the transit center location, the recoverable waste is intensively de-agglomerated and transported together with the other waste to a sorting center; and/or
And conveying the pre-meal garbage and the post-meal garbage to the transfer center for bag breaking, dehydration and compression treatment.
5. The method of sorting and processing waste as in claim 3, wherein in the sorting center sorting, the recyclable waste and the other waste are sorted to separate renewable resources.
6. The method of sorting and processing waste as in claim 5, wherein the recyclable waste is mechanically and automatically sorted by at least one of magnetic field, gravity, optical spectrum, and density to provide at least one of plastic, glass, metal, waste paper, and composite packaging; and/or
The sorting of other rubbish is with machine letter sorting as main, manual work letter sorting as the assistance to sorting out and carrying to renewable resources center with recoverable rubbish, the burning factory of remaining rubbish is sent to and is burnt.
7. The method of claim 1, wherein the renewable resources are used in a renewable resources center to process and sell recyclable waste or to provide raw materials for renewable resources industry.
8. The method of waste sorting and processing according to claim 1, wherein in the end centering, at least one of the following processes is included:
carrying out aerobic composting and harmless treatment on the pre-meal garbage;
lactic acid bacteria in the domesticated pre-meal garbage are screened, expanded and cultured to extract lactic acid, and polylactic acid is synthesized to be used as a raw material of the degradable garbage bag;
directly recovering the pre-meal garbage to be used as feed;
carrying out microbial fermentation and drying to obtain the biological protein raw material.
9. The method of waste sorting and processing according to claim 1, wherein in the end centering, at least one of the following processes is included:
pretreating the postprandial garbage, separating water and oil to obtain crude oil, and pulping the rest of the crude oil and the crude oil, and then feeding the rest of the crude oil and the crude oil into an anaerobic fermentation system to generate methane;
and directly sending the postprandial waste to a waste incineration power plant for co-treatment.
10. The method of sorting and processing waste of claim 1 further comprising the step of performing a non-hazardous landfill of the front end processing, the transfer center disposal, the sorting center sorting, the renewable resource center utilization, and the non-utilizable waste and waste residues produced in the terminal end.
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