| 摘要 |
PROBLEM TO BE SOLVED: To provide an ammonia hindrance-reduced methane fermentation treatment method capable of efficiently executing methane fermentation of an organic substance-containing liquid at a low cost, and an apparatus. SOLUTION: The organic substance-containing liquid S is charged to a fermentation tank 1 containing a methane fermentation microorganism group 4, a gas phase part 2 at a top part of the fermentation tank 1 is communicated with a circulation gas flow passage 11 including an ammonia capturing apparatus 10 at the outside of the fermentation tank 1, and a decomposition production gas G in the fermentation tank 1 is circulated between the gas phase part 2 and the capturing apparatus 10 while stirring a liquid phase part 3 in the fermentation tank 1. Preferably, the organic substance-containing liquid S of the liquid phase 3 in the fermentation tank 1 is stirred by circulating it so as to remove out it from a lower part and return it to the gas phase part 2. More preferably, the liquid phase substance 3 is stirred by blowing the gas G returned from the capturing apparatus 10 to the gas phase part 2 of the fermentation tank 1 to a liquid surface 7 in the fermentation tank 1. COPYRIGHT: (C)2007,JPO&INPIT
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