| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method and a device for treating organic discharged water in which the fat and oil content can be sufficiently removed and decrease in the quality of treated water can be enough prevented even when the load on the device is high. SOLUTION: The method for treating organic discharged water including an anaerobic treatment process to anaerobically treat the organic discharged water by using a methane fermentation tank 5 includes a process of draining the scum produced in the methane fermentation tank 5, a process of obtaining the decomposed product by biodegradation of the drained scum, and a process of adding the decomposed product into the organic discharged water in an acid production tank 3. Even when the load is high, the fat and oil content in the organic discharge water can be efficiently biodegraded by microorganisms which decompose fat and oil and which are included in the decomposed product. Therefore, the organic matter in the organic discharged water is efficiently decomposed by the sludge in the methane fermentation tank 5 as well as decrease in the production of gas can be prevented.</p> |
