Municipal organic waste combined anaerobic treatment process and equipment

Abstract

The invention discloses a municipal organic waste combined anaerobic treatment process and equipment. The process comprises a preprocessing step, an anaerobic digestion processing step and a swampiness processing step. Municipal organic wastes comprise heterogenous semifluid wastes and homogeneous solid-liquid wastes. The preprocessing step is characterized in that: circular pulping processing is firstly carried out on the heterogenous semifluid wastes, solid-liquid separation is then carried out on the circularly pulped materials and the homogeneous solid-liquid wastes, and the obtained slurry is used for the anaerobic digestion processing step. The invention also discloses equipment for the process. According to the process and the equipment, the municipal organic wastes are adopted as processing objects; the problems of homogenization of the municipal organic wastes, difficulty in feed-in and feed-out, and mixed feeding combined digestion are solved; the efficiency and the import substitution rate of a reactor are further improved through technology improvement on an anaerobic digestion tank; the aim of combined digestion is achieved; and a blank of domestic high solid wet type municipal organic waste combined anaerobic digestion processing complete technology process engineering is filled.

Description

technical field [0001] The invention relates to the field of organic waste treatment, in particular to a complete resource recovery process and equipment for biodegrading urban organic waste and obtaining biogas by adopting high-solid wet anaerobic digestion technology. Background technique [0002] Municipal organic waste mainly includes heterogeneous semi-fluid waste (kitchen, fruit and vegetable waste) and homogeneous solid-liquid waste (urban feces, sludge). Among them, kitchen waste mainly comes from food processing, catering services and residents. Food residues generated in daily life; fruit and vegetable waste mainly refers to waste such as vegetable leaves, melons and fruits produced in places such as agricultural product transfer bases and farmers' markets; urban feces and sludge come from urban public toilets or septic tanks in residential areas and sewage treatment factory. Due to the continuous changes in the composition of urban organic waste and the increasin...

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Problems solved by technology

However, the joint anaerobic digestion resource treatment project for urban organic waste in China has not been heard of. Compared with developed countries, the engineering application level of anaerobic digestion technology for urban organic waste in my country needs to be improved urgently

[0004] At present, the research on the anaerobic digestion technology of urban organic waste in my country is still in the preliminary stage, and the difficulties faced mainly include the following aspects: First, the composition of urban organic waste is complex, the physical and chemical properties are uneven, and the range of change is large. Second, urban manure, sludge and other urban organic waste cannot be mixed and fed together for joint digestion; urban organic waste such as kitchen and swill contains components such as grease and inorganic salts that inhibit anaerobic digestion; third, the efficiency of the reactor is relatively low. Low, long residence time, low conversion rate of organic matter, low localization rate of anaerobic system equipment

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