Method and apparatus for fermentation production of sludge gas with mixed stalk raw material

Abstract

The invention relates to a method for producing biogas through the fermentation of a straw mixed raw material and a device thereof, in particular to a method for producing the biogas through second-stage middle temperature fermentation treatment to a mixed raw material of cellulose of plant straws, kitchen household garbage, livestock and poultry manure and sewage, and a device thereof. The device is suitable for the comprehensive utilization of crop straws, kitchen household garbage, livestock and poultry manure and so on, and belongs to equipment needed by environmental engineering. The method comprises the following steps: through three pretreatment modes, the three raw materials are pretreated and then are mixed according to the proportion of 1 to 1 to 3; the mixing ratio of each raw material can be 10 to 20 percent more or less; the carbon-nitrogen mol ratio is controlled to be between 25 to 1 and 30 to 1; the raw materials enter a main anaerobic fermentation tank and an auxiliary anaerobic fermentation tank after the mixing; the volume ratio of the main tank and the auxiliary tank is 1 to 1.5; the main anaerobic fermentation tank is provided with a thermal insulation layer; and a zymocyte bed, a stirring device, a temperature control device, and a circulating hot water heating device are arranged in the main anaerobic fermentation tank. The device can synchronously treat the plant straws, the kitchen household garbage, and the livestock and poultry manure and sewage, realize the automatic thermostatic control and second-stage fermentation, and has high biogas yield.

Description

Technical field [0001] The present invention relates to a method and device for producing biogas by fermenting mixed raw materials of straw, in particular to a secondary medium-temperature fermentation treatment of biomass resources, that is, cellulose raw materials of plant straw, kitchen garbage, livestock and poultry feces and sewage mixed raw materials fermented to produce biogas method and device. It is suitable for the comprehensive utilization of crop straw, kitchen waste, livestock and poultry manure, etc., and is an equipment device required by environmental engineering. Background technique [0002] Implementing the scientific outlook on development, realizing the harmonious development between man and nature, expanding the recycling of resources, promoting the scientific utilization of biomass energy and protecting the ecological environment have become more and more themes of development in the world today. Oil resources, which are the backbone of the world econ...

AI Technical Summary

Problems solved by technology

The existing traditional biogas digesters have a single pretreatment method and a single processing raw material, which cannot well solve the winter production problem of biogas in alpine regions. It occupies a large area, has high cost, low comprehensive utilization rate, and incomplete fermentation. The treatment of pollution, etc. is not thorough and rapid, and the overall benefit is not high

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