| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a waste liquid treatment system which can discharge treated water obtained by treating an organic waste liquid to a river or the like regardless of the concentration of the organic waste liquid while satisfying control. <P>SOLUTION: The waste liquid treatment system is provided with a solid-liquid separator 22 for separating the organic waste liquid into a solid part and a liquid part other than the solid part, a pre-aeration tank 4 for applying biological treatment with microorganisms to the liquid part separated by the solid-liquid separator 22, a settling tank 5 for precipitating solids in the liquid part applied to the biological treatment in the pre-aeration tank 4 to separate a supernatant liquid, and an aeration tank 6 and a membrane separation tank 7 for applying biological treatment with microorganisms to the supernatant liquid separated in the settling tank 5. A MF membrane having micrometer (μm)-order fine pores is installed in the membrane separation tank 7, and the supernatant liquid undergoing the biological treatment in the aeration tank 6 and the membrane separation tank 7 is extracted by passing through the MF membrane to discharge the obtained liquid as treated water. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
