The invention discloses an anaerobic
biogas preparation device based on kitchen garbage, and relates to the technical field of kitchen garbage treatment.The anaerobic
biogas preparation device comprises a squeezing box, the upper end of the squeezing box is connected with a feeding mechanism capable of conducting crushing treatment on the kitchen garbage, and a separation mechanism used for conducting
solid-liquid separation on the kitchen garbage is installed in the squeezing box; a liquid discharging mechanism capable of discharging
grease liquid and non-
grease liquid of the kitchen garbage filtrate in a split-flow manner is arranged below the separating mechanism; a conveying
auger; the discharging end of the conveying
auger is communicated with the interior of the pyrolyzing furnace through a connecting
pipe; through cooperation of the squeezing box, the conveying
auger and the pyrolyzing furnace, the high-
grease liquid is separately shunted by utilizing the liquid discharging mechanism, and only the non-grease liquid is fed into the
anaerobic reactor, so that inhibition of grease on methanogens is eliminated from the source, the
pyrolysis condensate and the non-grease liquid are cooperatively fermented, the
utilization rate of a reaction substrate is improved, and the
biogas yield is further improved.