| abstract |
A straw wet anaerobic fermentation and aerobic fermentation combined treatment device and a method belong to the technical field of biogas production by utilizing straw anaerobic fermentation. The biogas slurry conveyed from the outside enters a biogas slurry storage tank for temporary storage, enters a hydrolysis tank through a pump, the straw enters a straw crusher through a loading tool, the crushed straw enters the hydrolysis tank through a belt conveyor, the straw and the biogas slurry tank are sufficiently hydrolyzed and acidified, meanwhile, hydrolytic enzyme is added, an I-type solid-liquid separator is used for separating aerobic fermentation products after hydrolytic acidification, the separated solid enters a pipeline pulping machine, all the slurry enters a II-type solid-liquid separator, after solid-liquid separation, the solid part contains cellulose and hemicellulose and enters an aerobic fermentation organic fertilizer production workshop, the liquid part enters a temporary storage tank and enters an anaerobic fermentation tank through a pump, the produced biogas is externally used, and the generated biogas slurry flows back. A large amount of biogas slurry can be consumed, no biogas slurry is discharged, and the hydraulic retention time of straw anaerobic fermentation is shortened to about 22 days from 48 days. |