A two-stage dry digestion method and device for waste

A technology of waste and dry process, applied in the direction of biochemical cleaning equipment, biochemical equipment and methods, chemical instruments and methods, etc., to achieve high methane yield, release inhibition, improve waste conversion rate and methane yield Effect
CN104004795BInactive Publication Date: 2017-07-21INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2017-07-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention provides a method and a device for two-stage dry digestion of wastes. The method comprises: inoculating microorganisms in a first-stage reactor, to make waste materials fully fermented to produce acid; after acid production is finished, using alkaline substances to neutralize organic acid so as to regulate the pH value; and performing a second stage of dry fermentation to produce methane. The method can effectively overcome suppression of organic acid to a digestion process during anaerobic digestion, and does not produce a large amount of waste water because rinsing is not required.
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Description

technical field

[0001] The present invention relates to the field of waste treatment. Specifically, the present invention relates to a method and device for continuously treating waste by using microbial dry digestion. In particular, two-stage reactors are used to relieve the inhibition of the accumulation of organic acids on the methanogenic process. In the field of comprehensive classification utilization and advanced treatment of waste. Background technique

[0002] my country has a large amount of solid biomass waste that needs to be disposed of. For example, most urban waste is piled up in the open air, which generates a large amount of heat energy and harmful gases such as ammonia, methane, and hydrogen sulfide. The gas concentration is too high to form a stench, surrounding the city from the air. At the same time, these wastes will spontaneously ignite and explode. This not only affects the urban landscape, but also pollutes the air, water and soil, posing a threat t...

Claims

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