A rapid construction method for methanogenesis under acidic conditions

Abstract

The invention relates to a quick construction method for generating methane under an acidic condition. The quick construction method comprises the following steps: pretreating seed sludge, performing habituated culture on the seed sludge to form acid-resisting acidophilus microorganism agglomerate rich in acid-resisting acidophilus methanogens and other symbiotic bacteria, inoculating the acid-resisting acidophilus microorganism agglomerate to a closed reactor containing fresh or acidulated perishable organic waste, and conducting anaerobic digestion to generate methane. Compared to the prior art, the methane generating method disclosed by the invention can maintain the methane generating activity under the acidic condition (at the pH value of 5.5-6.2), implement high organic loading anaerobic treatment to generate the methane with the organic waste at a lower inoculation rate, and further can be used for quickly enabling a rancidified anaerobic digester to restore generation of methane.

Description

technical field

[0001] The invention belongs to the fields of environmental protection and comprehensive utilization of resources, and relates to a process for anaerobic digestion of waste to produce methane, in particular to a method for quickly constructing and stably treating high-concentration organic matter in acidic conditions for methane production. Background technique

[0002] Solid waste such as kitchen waste, food waste, food processing waste, and fermentation industrial waste is huge, and because of its high proportion of easily degradable organic components, such as starch, protein, fat, etc., it is easy to corrupt, also known as Perishable organic waste. Taking Shanghai as an example, the daily collection and transportation of kitchen waste has reached 13,000 tons / day, and the collection and transportation of food waste has reached 2,797 tons / day. If such a huge amount of perishable organic waste is not properly disposed of, it will cause serious secondary pol...