| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a methane fermentation apparatus of low cost, suppressing deposition of MAP (magnesium ammonium phosphate) in a membrane permeation liquid leading out pipe, while keeping the inside of a methane fermentation tank at an appropriate pH value suited to methane fermentation. <P>SOLUTION: The methane fermentation apparatus 11 is provided wherein organic substances having higher temperature than digested sludge in the methane fermentation tank 12 and liquefied to be dissolvable is fed to the methane fermentation tank 12, and the digested sludge in the methane fermentation tank 12 is condensed by a membrane separating means 13 to perform the methane fermentation. The apparatus 11 includes the membrane permeation liquid leading out pipe 30 for taking out the membrane permeation liquid having passed through a separation membrane 19 of the membrane separating means 13 to the outside, and a heat exchanging means heat-exchanging between the membrane permeation liquid flowing through the membrane permeation liquid leading out pipe 30 with an organic substance in a solubilization tank 15 for heating the membrane permeation liquid. A coil-like pipe 30a formed at a part of the membrane permeation liquid leading out pipe 30 is provided in the solubilization tank 15 as the heat exchanging means. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
