| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce an amount of removed sludge, substantially decrease an organic component in the sludge and also increase a recovery rate of a methane gas by causing a larger amount of inorganic components in the sludge accumulated in an anaerobic digestion tank to migrate to a separated liquid and discharging outside the system. <P>SOLUTION: The anaerobic treatment apparatus has the anaerobic digestion tank 1 for carrying out anaerobic digestion treatment of a liquid to be treated containing an organic waste liquid, a dilution treatment tank 2 for mixing an outflow liquid from the anaerobic digestion tank 1 with diluting water and agitating to elute the inorganic component in water, diluting liquid feeding means for feeding an outflow liquid from the dilution treatment tank 2 to solid-liquid separation means 3, the solid-liquid separation means 3 for carrying out solid-liquid separation of a mixed liquid of the outflow liquid from the anaerobic digestion tank 1 and the diluting liquid to discharge at least a part of the separated liquid outside the system, and sludge recirculation means for recirculating the sludge separated by the solid-liquid separation means 3 to the anaerobic digestion tank 1. A part of the organic waste liquid is fed to the dilution treatment tank 2 as the diluting water and the remnant of the organic waste liquid is fed to the anaerobic digestion tank 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
