The invention provides a method for resourceful treatment of blue-
green algae and reed straws, which comprises the following steps: (1) mixing dehydrated blue-
green algae, crushed reed straws and water to obtain a mixture to be fermented; (2) introducing the to-be-fermented mixed material into an acidification
hydrolysis fermentation tank, adding a first bacterial liquid, introducing protective gas, and carrying out acidification
hydrolysis fermentation in a closed environment to obtain a fermented mixed material; (3) when the pH value and the
acetic acid volume content of the fermented mixture reach target values, releasing the closed environment, and performing
solid-liquid separation to obtain
biogas slurry and
biogas residues; (4) introducing the
biogas slurry into an anaerobic
methanogenesis fermentation tank, adding a second bacterial liquid, introducing protective gas for anaerobic
methanogenesis fermentation, and collecting produced
methane gas; and (5) introducing the biogas residue into an aerobic fermentation tank, adding an aerobic fermentation bacterial liquid, carrying out aerobic fermentation, and collecting the produced finished product
organic fertilizer. According to the method provided by the invention, efficient reutilization of the blue-
green algae and the reed straws is realized, the treatment efficiency and the gas
production rate are improved, and large-scale popularization and application are facilitated.