Method for preparing functional blue-green algae biochar and applying functional blue-green algae biochar to intensifying anaerobic digestion

Abstract

The invention provides a method for preparing functional blue-green algae biochar and applying the functional blue-green algae biochar to intensified anaerobic digestion, and belongs to the technical field of solid waste resourceful treatment. The types and number of oxygen-containing functional groups on the surface of the blue-green algae biochar are directionally regulated and controlled by utilizing a hydrogen peroxide surface oxidation method, and the electron gaining and losing capability and the oxidation-reduction activity of the blue-green algae biochar material are remarkably improved. The preparation method of the functional blue-green algae charcoal based on surface oxygen-containing functional group directional regulation and control is established for the first time, and the functional blue-green algae charcoal is applied to an enhanced anaerobic digestion system, so that the methane production starting period can be shortened, the methane production rate is increased, and meanwhile, the methane yield is increased; and the overall efficiency of anaerobic digestion treatment of the organic wastes is further improved.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, and in particular relates to a method for preparing functional cyanobacteria biochar and applying it to enhanced anaerobic digestion. Background technique [0002] Cyanobacteria are the ecological products of eutrophication in water bodies. The outbreak of cyanobacteria has seriously affected the water quality of freshwater lakes in my country and the living environment quality of surrounding residents. At present, centralized salvage based on "algae-water separation" is the main control method to deal with the blue-green algae problem in the Taihu Lake Basin and other regions, and a large amount of blue-green algae mud biomass will be produced during the salvage period. Taking the Taihu Lake Basin as an example, the amount of blue-green algae mud that needs to be salvaged to control the water environment reaches one million tons every year. Proper disposal of blue-green a...

AI Technical Summary

Problems solved by technology

[0004] It should be pointed out that although the primary cyanobacterial biochar prepared by low temperature and slow pyrolysis has a relatively rich surface functional group structure, the specific functional groups (such as surface oxygen-containing functional groups) closely related to the redox ability of biochar materials are not dominant. status, which also leads to the limited redox ability of primary cyanobacteria biochar, and when it is applied to complex anaerobic digestion system, it will be interfered by other factors and cannot play a role

However, due to the many uncontrollable factors in the pyrolysis process, it is still difficult to control the surface functional groups of biochar materials in the pyrolysis stage of biochar.

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