| 摘要 |
PROBLEM TO BE SOLVED: To provide a wastewater treatment method and a wastewater treatment apparatus which can extract high content of methane gas to effectively utilize it as an energy resource. SOLUTION: This wastewater treatment apparatus 10 is provided with a raw water tank 11 for collecting waste water 31 containing organic substances discharged from a disposer 5, and a fermentation tank 13 for decomposing the collected waste water 31 by methane fermentation and extracting the methane gas 35, and is provided with a concentrator 12 for increasing the concentrations of the organic substances in the wastewater 31 collected in the raw water and supplying the wastewater to the fermentation tank 13. As the methane fermentation is carried out in the fermentation tank 13 after increasing the concentrations of the organic substances in the wastewater 31, the efficiency of the methane fermentation is improved, and the concentration of the extracted methane gas 35 becomes high, thereby the methane gas can be effectively utilized. COPYRIGHT: (C)2003,JPO
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