| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a treatment method for organic waste water, which does not need large-scale equipment or steps for removing oil and fat, has a low sludge conversion rate, and is capable of stably performing treatment with a low film pressure difference. <P>SOLUTION: The treatment method for organic waste water includes: a step of introducing the organic waste water containing 30-1,000 mg/L of oil and fat into a bacteria tank 10, performing bacteria treatment practically in the absence of protozoans inside the bacteria tank 10, oxidatively decomposing at least part of the oil and fat, converting it to non-cohesive bacteria and obtaining primarily treated waste water; and a step of introducing the obtained primarily treated waste water to a membrane separation tank 20 containing active sludge, making the protozoans prey on and remove the non-cohesive bacteria, and then executing solid-liquid separation by a separation membrane 25. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
