Kitchen waste collaborative wet and dry anaerobic digestion treatment system and method

Abstract

The invention relates to a kitchen waste collaborative wet and dry anaerobic digestion treatment system and method. The kitchen waste collaborative wet and dry anaerobic digestion treatment system comprises a kitchen waste receiving hopper, a coarse crusher, a magnetic separator, a star disc sieve, a reducing screw extrusion device, a screw press dehydrator, a sand remover, an impurity removal separator, an oil-water separation device, a wet anaerobic fermentation tank and a dry anaerobic fermentation tank, wherein the oil-water separation device is selected according to the actual oil content of materials. According to the kitchen waste collaborative wet and dry anaerobic digestion treatment system and method, a pulping section of a traditional pretreatment link can be omitted, the problems of equipment abrasion caused by the pulping link, difficult sand and stone separation caused by high solid content of slurry, small flux of pulping equipment and the like are greatly reduced, the collaborative advantages of wet anaerobic treatment for fine waste and dry anaerobic treatment for coarse waste are fully exerted, and an oil removal pretreatment section can be selectively added in combination with the oil content of the materials; and the kitchen waste collaborative wet and dry anaerobic digestion treatment system and method have a series of advantages of high separation efficiency, low equipment abrasion, high organic matter utilization rate, no need of additional water in the process, low sewage yield, land saving and the like.

Description

technical field [0001] The invention belongs to the technical field of anaerobic digestion and treatment of kitchen waste by source classification, and in particular relates to a combined wet and dry anaerobic digestion treatment system and treatment method of kitchen waste. Background technique [0002] Source-sorted kitchen waste, including household-sorted kitchen waste, fruit and vegetable waste, and vegetable market waste. Since the promotion and implementation of the garbage classification mechanism in my country is still in its infancy, the level of garbage classification in various regions is uneven. Under the garbage classification system represented by Shanghai, the classification level of kitchen waste is relatively high, and the classified kitchen waste has a high moisture content. , high oil content and high organic matter content. But even so, kitchen waste still contains some interfering substances, such as plastic bags, packaging boxes, bones, shells and othe...

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Problems solved by technology

[0005] In view of the characteristics of high moisture content, high oil content and high organic matter content of kitchen waste after classification from domestic sources, but there are defects in the singl

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