Food waste treatment system and method

Abstract

The invention relates to a kitchen garbage treatment system including a pretreatment subsystem and an aerobic fermentation pot subsystem. The system aims to implement solid-liquid separation (solid garbage and liquid garbage), solid-solid separation (organic garbage and inorganic garbage) and liquid-liquid separation (oil and water) in every process of raw kitchen garbage after garbage feeding and storing, wherein the liquid garbage and the solid garbage are subjected to different treatment methods and treatment devices respectively according to characteristics of themselves to achieve automation of oil-water separation, simplification of sewage treatment and device selection rationalization, and also can enable the garbage, before into aerobic fermentation, to has following characteristics: organic component maximization, water content rate minimization, auxiliary material use amount minimization and reduction of operation cost. By means of sealed-type high-speed aerobic fermentation subsystem, the organic components in the kitchen garbage can be fully degraded, fermented and decomposed, wherein a fermentation time can be reduced within 15-21 days, so that an organic fertilizer can be produced and grease can be separated out to finally achieve harmless and recycle of the kitchen garbage.

Description

technical field [0001] The invention relates to a food waste treatment system and method, in particular, the invention relates to a food waste closed aerobic tank-type fermentation composting treatment system and method that efficiently utilizes solid-liquid separation, solid-solid separation, and liquid-liquid separation technologies. Background technique [0002] The main source of food waste is the catering industry and unit canteens in various cities. Due to many factors in the current management and collection, the food waste entering the factory is complicated. Its components may include but are not limited to: oil, water, fruit peels, vegetables, rice noodles, Fish, meat, bones, and waste tableware, glass containers, metal utensils, plastics, paper towels, towelettes, etc. [0003] Food waste has a high moisture content, generally 80%-90%, which is perishable and produces stench. Improper disposal (landfill or incineration) causes serious environmental pollution. Th...

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Problems solved by technology

[0005] However, there are also many shortcomings in the existing kitchen waste treatment process and its equipment.

First of all, due to the huge content and complex composition of food waste, it is difficult to completely sort the debris under high-humidity materials, which will affect the treatment efficiency of food waste

Secondly, due to the incomplete sorting of the sundries contained in the food waste, it will affect the working efficiency and service life of the processing equipment, and the grease in the food waste cannot be completely separated

In addition, since food waste is mainly composed of solid-phase waste and liquid-phase waste, if the liquid-phase waste in food waste cannot be separated well, it will be difficult for food waste treatment products such as compost or feed protein powder or fermentation to produce biogas The quality and terminal sewage treatment have adverse effects

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