Method for producing biogas by co-fermentation of blue-green algae and bottom mud

Abstract

The invention belongs to the field of river and lake pollution control, and particularly relates to a method for producing biogas by co-fermentation of blue-green algae and bottom mud. The method comprises the following steps: mixing the blue-green algae and the bottom mud according to a certain proportion, and then fermenting; meanwhile, adding a certain amount of iron oxide, enriching iron reducing bacteria to accelerate hydrolysis, and preventing acidification of an anaerobic reaction system. A large amount of biomass energy can be recovered from the blue-green algae at the highest efficiency, and meanwhile, the bottom mud can be subjected to harmless treatment at the maximum, so that the problem of low gas production efficiency during co-fermentation of the algae and the mud is solved.

Description

technical field

[0001] The invention belongs to the field of pollution control of rivers and lakes, and more specifically relates to a method for producing biogas by co-fermentation of cyanobacteria and bottom mud. Background technique

[0002] Since the 1990s, the eutrophication of freshwater in my country has become increasingly serious. Severe cyanobacteria blooms frequently occur in lakes, rivers and other water bodies. Cyanobacteria multiply rapidly in eutrophic water bodies, water transparency decreases, and water functions are destroyed. The long-term accumulation of cyanobacteria blooms leads to rot and odor, decomposes and releases a large amount of nitrogen, phosphorus and other nutrient salt particles, hydrogen sulfide gas and microcystin and other harmful substances, causing secondary pollution to the environment. At present, the disposal method for cyanobacteria is through salvage, and the water quality can be purified through timely salvage of algal blooms. Cy...

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