| 摘要 |
PURPOSE: An external-circulation type anaerobic digester is provided to minimize the lost amount of anaerobic micro-sludge through an outflow pipe by suppressing the increase of the anaerobic micro-sludge. CONSTITUTION: An external-circulation type anaerobic digester includes a waste-water inflow pipe(130), a distributor(140), a digestion tank(120). A first gas separator(150) and a second gas separator(160) are installed in the digestion tank to be spaced apart from each other. The gas separators separate remained micro sludge from collected gas and re-supplies the separated micro sludge into the digestion tank. A gas separation tank(180) discharges gas through a gas discharging pipe(184). A waste-water inflow unit(170) for a circulation operation is installed between the gas separators. |
