Methane fermentation treatment method for chicken dung

摘要

PROBLEM TO BE SOLVED: To obtain an effective means which prevents malodors, improves the efficiency of methane fermentation and utilizes collected methane gas at the time of collected the gaseous methane by treating poultry manure. SOLUTION: A hermetically sealed gas generating vessel 2 has a heating mans for the poultry manure slurry in a slurrying vessel 1 and a pressure control means for maintaining the pressure in the vessel under nearly the specified pressure by taking out the gaseous methane when the pressure in the vessel rises. The anaerobic bacterium-contg. water taken out of the bottom of the gas generating vessel is subjected to acceleration of the methane fermentation by circulating the water from the middle of the height of the gas generating vessel 2 to return the water to the upper position and stirring the inside of the vessel. The anaerobic bacterium-contg. water taken out of the bottom is occasionally returned to the slurrying vessel 1 to maintain the liquid levels in the slurrying vessel 1 and the gas generating vessel 2 at nearly the specified liquid levels. The waste water contg. the anaerobic bacteria generated from the respective parts of the device is completely returned to the slurrying vessel 1 or the gas generating vessel 2, by which the run-off of the anaerobic bacteria is prevented.