Composition for starting household garbage dry anaerobic fermentation system and starting method

Abstract

The invention provides a composition for starting a household garbage dry anaerobic fermentation system and a starting method. The composition comprises a fermentation inoculum and a nutritional structure, wherein the fermentation inoculum is solid activated sludge, and the nutritional structure is cured compost or straws and/or bits of wood, and the mass ratio of the fermentation inoculum to the nutritional structure in the composite is 1 to (2 to 1). The materials of the composition for starting provided by the invention are applied to a large-size household garbage dry anaerobic fermentation system, especially a large-size household garbage dry anaerobic fermentation system of which the effective volume of a fermentation tank is larger than 3,000 cubic meters; the starting success rate is high, the starting period is short, the whole starting process can be finished within 6 weeks, and very high economic benefit is brought while quick starting is realized.

Description

technical field [0001] The invention relates to a start-up composition and a start-up method for a dry anaerobic fermentation system of domestic waste, and is particularly suitable for rapid start-up of a large-scale dry anaerobic fermentation system for domestic waste with an effective volume of a fermenter > 3000 cubic meters. Background technique [0002] Anaerobic fermentation treatment technology is divided into wet fermentation and dry fermentation according to the solid content of the substrate. Dry fermentation refers to anaerobic fermentation treatment in which the solid content of fermentation raw materials is controlled at 20% to 50%. Compared with traditional wet fermentation, dry fermentation has the advantages of higher organic treatment load rate and high gas production efficiency. "China's Biomass Resource Science and Technology Development Roadmap to 2050" pointed out that the development of biogas dry fermentation technology is an important development d...

AI Technical Summary

Problems solved by technology

For some large domestic waste dry anaerobic fermentation systems, such as the domestic waste dry anaerobic fermentation system with an effective volume of the fermenter > 3000 cubic meters, in the actual implementation, the use of fermenters with the same effective volume requires a relatively small amount of start-up materials. Large, long startup time

In addition, in the dry anaerobic fermentation system of large-scale domestic waste, the contact between the inoculum and the fermentation substrate is poor, it is difficult to mix the materials evenly, the adaptation process of the bacteria to the waste is long, and local acidification is prone to occur, resulting in startup failure

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