Cooperative treating method of kitchen waste and sludge of sewage plant

Abstract

The invention discloses a cooperative treating method of kitchen waste and sludge of a sewage plant. The method comprises the following steps that A, a kitchen waste source is pretreated; B, the sludge is subjected to high-temperature hydrolysis cooperating with anaerobic digestion; C, biogas residues are dehydrated and pressed; and D, drying treatment is conducted to obtain finished products. The cooperative treating method has the advantages that after the comprehensive treating processes that the kitchen waste source is pretreated, the sludge is subjected to high-temperature hydrolysis cooperating with anaerobic digestion, the biogas residues are dehydrated through a dehydrator and pressed directly through a high-pressure filter press and subjected to solar drying, stabilization, harmlessness and reduction of the sludge can be achieved, and meanwhile waste is changed into treasures, specifically, available biogas and garden greening soil and forest land are produced.

Description

technical field [0001] The invention relates to an environmental protection and renewable energy treatment technology, in particular to a method for synergistic treatment of kitchen waste and sewage plant sludge. Background technique [0002] As waste in the catering service link, kitchen waste has complex components and is extremely perishable. Food processed and produced with "waste oil" and "soiled pigs" fed with kitchen waste will be extremely harmful to the human body. Therefore, whether the kitchen waste can be properly disposed of is directly related to food hygiene and safety and the health of the people. With the rapid development of urban sewage treatment in my country, the amount of sludge generated is increasing day by day. [0003] Sewage plant sludge contains heavy metals, pathogenic microorganisms, etc., which can easily cause secondary pollution. At the same time, sewage sludge contains more organic matter, which has high resource utilization value. For se...

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Problems solved by technology

Anaerobic digestion can convert low-quality organic matter in sludge into high-quality energy, but traditional anaerobic digestion has the problem of low biogas production due to low organic matter content and poor biochemical properties of sludge

[0004] In addition, methods for disposing of solid wastes are disclosed in the prior art, for example, the patent number is CN201510020671.9, and the invention patent titled "Method for Collaborative Disposal of Municipal Solid Wastes" is CN201210164814.X, and the name is a The invention patent and the patent number of the comprehensive treatment method for sewage treatment plant sludge and kitchen waste oil are CN201310582816.5, and the title is a comprehensive waste treatment process. Treatment process and equipment, reported the information platform for the collection, transportation and disposal of kitchen waste, and reported the treatment process of kitchen waste and sludge, including pretreatment, sorting, anaerobic fermentation, filter press and other processes, the above-mentioned various documents Different treatment methods are mentioned, but the specific treatment process is not appropriate, not only easy to secondary air pollution, large emissions, but also high cost of treatment

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