Food waste and kitchen garbage pretreatment method

Abstract

The invention provides a food waste and kitchen garbage pretreatment method. The method includes the steps that food waste and kitchen garbage are collected; and an extruding and bag breaking device is used to perform extruding and bag breaking, flattening, mashing and pounding, metal is separated out, and plastics, food boxes and wooden chopsticks of oversize products after bag breaking enter a harmless disposal system. Sieve residues after being extruded fall into a hot water rotational flow separation system, and are separated in high temperature water with the temperature being 60 DEG C orabove, and after being completely washed by rotational flow waste water, heavy substances are squeezed and subjected to water draining to be discharged; and oil residue water in hot water rotationalflow separation is brought into a squeezing and filtering separation system by circulating hot water, and is further subjected to squeezing separation to form solid residues and oil water; and filtered waste water cyclically flows back to the hot water rotational flow separation system. The food waste and the kitchen garbage can be treated at the same time, so that the equipment one-time input cost can be saved, and flexible material bodies such as plastic bags and plastic food boxes are not damaged. Three-phase separation of light and heavy substances and oil water is performed in a hot waterrotational flow manner, so that perishable organic matter and grease can be sufficiently recycled.

Description

technical field [0001] The invention relates to a method for treating garbage, in particular to a pretreatment method for kitchen waste and kitchen waste. Background technique [0002] With the rapid development of urbanization in China, people's living standards are becoming more and more rich, and the daily amount of kitchen waste generated by households and farmers' markets, as well as food waste generated by catering enterprises, school canteens and canteens of enterprises and institutions is quite large. Due to many factors in the current management and collection, the composition of collected kitchen waste and food waste is extremely complex. For example, kitchen waste may include but not limited to: vegetable leaves, fruit peels, egg shells, tea residues, bones, plastics, etc. Tableware, toothpicks, plastic bags, etc.; and food waste may include but not limited to: oil, water, fruit peels, vegetables, rice noodles, fish, meat, bones, shells and waste tableware, knives...

AI Technical Summary

Problems solved by technology

[0004] For example, Chinese patent CN 108687103 A discloses a pretreatment method for kitchen waste. After the first preliminary and second preliminary treatment, the fermentable organic substances in the waste are crushed, pulped and squeezed; the method exists Problem: Due to the complex composition of kitchen waste and food waste, it often contains some plastic bags, shells, glass containers and other substances that are excessively crushed and become part of fermentable organic matter, which affects the effect of resource utilization

[0005] Chinese patent CN 205032223 U discloses a kitchen and kitchen waste pretreatment system, which includes a feeding system and a sorting system, using multiple sets of hammers and multiple sets of crushing knives for purely mechanical sorting, the method exists Problem: Due to the complex composition of kitchen waste and food waste, it often contains some hard substances such as waste tableware, knives, glass containers, metal utensils, etc., which makes mechanical equipment easy to damage and high maintenance costs, and the bottom of the cylinder adopts through holes Discharge of organic matter, resulting in small particle size and other inorganic matter will also enter the proposed organic matter, affecting the effect of resource utilization

Problems with this method: the equipment structure is complex, the kitchen waste and catering waste are treated separately in the early stage, and the screening and pulping process is equipped with multiple stages of sand discharge, resulting in cumbersome operations and a lot of investment and operating costs.

Problems in this method: due to the complex components of kitchen waste and kitchen waste, they often contain some plastic bags, shells, glass containers and other substances that are crushed together and become part of the organic matter for insect breeding, which affects organic fertilizers and feeds. The effect of production utilization

[0008] The common unsolved problem of the above disclosed invention patents is that plastic bags, lunch boxes, paper towels, and sludge generated by the system cannot be used in a harmless manner.

The disadvantages of the existing technology can be high cost, low efficiency, time consuming and similar issues

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