Comprehensive pre-treatment method of kitchen garbage and gutter oil

Abstract

The present invention discloses a comprehensive pre-treatment method of kitchen garbage and gutter oil. The method comprises material collection, sorting treatment, pulping treatment, deoiling treatment and overall deodorization treatment. By adopting a multi-step and multi-stage sorting process, the method disclosed by the invention effectively separates non-biomass impurities in kitchen wastes, thereby providing an advantageous condition for a subsequent treatment process. According to the present invention, a two-stage centrifugal manner is used in grease separation and purification for increasing the separation accuracy, reducing the residence time, reducing the energy consumption, and a primary stage horizontal centrifuge is used for solid-liquid separation and a secondary vertical centrifuge is used for oil-water separation. As materials with a high solid content separated by the primary centrifuge no longer enter into the secondary centrifuge, the energy consumption is significantly reduced, the residence time can be shortened, and the separation accuracy is improved. According to the method disclosed by the present invention, the pre-treated materials have an ultra low oil content, can be adaptive to various post-treatment processes of composting, producing biogas by anaerobic fermentation, processing feeds and the like, and can be flexibly applied to subsequent process, thus providing a guarantee for realizing harmlessness and recycle of kitchen wastes.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a comprehensive pretreatment method for kitchen waste and waste oil. Background technique [0002] Catering biomass waste refers to food residues, food processing waste, waste edible oils (including non-edible animals, etc.) Vegetable grease and various oil-water mixtures), waste oil and other garbage. Food and kitchen biomass waste has high water content, high salt content, high pepper / acetic acid content in some areas, high content of organic matter, protein cellulose, starch, fat, etc., pathogenic bacteria and pathogenic microorganisms, and is easy to rot, deteriorate, and develop at room temperature. Stinky and a breeding ground for mosquitoes. [0003] At present, the kitchen biomass waste in my country's cities is in a state of serious disorderly management. The harmless rate of kitchen biomass waste is low, and it has not been properly treated for a long time. "Ga...

AI Technical Summary

Problems solved by technology

Most of the projects put into production above have problems such as blindly introducing imported technology, lack of experience, and insufficient estimation of raw material impurities.

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