Kitchen waste resourceful treatment process

Abstract

The invention discloses a kitchen waste resourceful treatment process. The kitchen waste resourceful treatment process comprises the steps of carrying out pretreatment on collected kitchen wastes at first, wherein the pretreatment comprises sorting, crushing and cooking kitchen wastes at a high temperature; then carrying out three-phase separation on the pretreated kitchen wastes to separate out crude fat, wastewater and solid slag, and collecting the crude fat in a unified manner; adding a biological agent in the solid slag after three-phase separation, carrying out aerobic fermentation and secondary fermentation, after separating water vapor generated by fermentation, carrying out wastewater disposition and emission on a water portion and the wastewater obtained from three-phase separation, and carrying out waste gas disposition and emission on a waste gas portion. The invention provides the improved kitchen waste resourceful treatment process, the yield of the crude fat of the kitchen wastes is greatly improved, high resourceful earnings can be gained, meanwhile, an aerobic fermentation period can be shortened, the quality of compost is improved, and near zero emission of odor and wastewater is realized.

Description

technical field [0001] The invention belongs to a waste treatment process, and in particular relates to a kitchen waste resource treatment process. Background technique [0002] Food waste mainly includes rice, pasta residues, meat, vegetables, bones, melon and fruit peels, etc., with starch, dietary fiber, protein, lipid and other organic substances as the main components, and also contains inorganic salts, which have High oil, high salinity, high moisture, high organic matter content and perishable odor, easy acidification, easy biodegradation and other characteristics. Because of its rich nutrient elements, it has great recycling value. The characteristics of food waste are embodied in the following aspects: [0003] 1. High moisture content. The moisture content of food waste can generally reach 80% to 90%, so it has high fluidity, inconvenient transportation, easy leakage, low calorific value, and improper treatment methods are likely to cause secondary pollution. ...

AI Technical Summary

Problems solved by technology

The moisture content of food waste can generally reach 80% to 90%, so it is highly fluid, inconvenient to transport, very easy to leak, low in calorific value, and prone to secondary pollution due to improper treatment methods

[0004] 2. High content of organic matter

[0005] 3. High oil and salt content

Food waste has the characteristics of high salt content and easy acidification, etc. These factors should be considered comprehensively during treatment to prevent problems such as inhibition of oil and salt or low utilization of resource-based products

[0006] 4. Food waste is easy to rot and deteriorate at room temperature, and it is easy to breed germs and cause various diseases

[0008] 1. Affect the city appearance and living environment; first of all, the properties of the kitchen waste itself will affect people's vision and sense of smell, and in addition, the garbage is prone to produce odor, sewage and other environmental pollution during the processing process

[0009] 2. Food waste is used as feed to feed livestock. Since food waste is extremely perishable, a large amount of toxins and germs are produced during transportation and storage, which will directly affect human health after being used as livestock feed

[0010] 3. "Hogwash oil" derived from food waste is very easy to produce a carcinogen - aflatoxin, which is extremely harmful to people's health

[0011] 4. If the waste oil and solid residue in the kitchen waste are discharged into the sewer, it is easy to cause blockage, pollute the environment, and even cause serious situations such as the explosion of the sewer pipe

[0016] 2. It is difficult for common bacteria to survive in the high-salt and high-oil kitchen waste environment, which affects the time and quality of aerobic fermentation;

[0017] 3. In the process of food waste treatment, waste water and waste gas are not well treated, and there is still some pollution to the outside world, especially the serious odor

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