| 摘要 |
PURPOSE:To permit a waste water treatment with high efficiency and a decreased amt. of sludge to be generated by treating waste water by an anaerobic biological treatment means then treating the same with a circulation line arranged successively with a solid-liquid sepn. means and aerobic biological treatment means. CONSTITUTION:The org. waste water is subjected to the anaerobic biological treatment in a 1st treatment line disposed with the anaerobic biological treatment means 3. The waste water treated by the means 3 is repeatedly subjected to the solid-liquid sepn. treatment and the aerobic biological treatment and is thereby cyclically treated in the 2nd treatment line arranged successively with the solid-liquid sepn. means 6 to execute the solid-liquid sepn. and the aerobic biological treatment means 7 to execute the aerobic biological treatment. As a result, the need for adjusting the balance of the flow rate between the anaerobic biological treatment means and the aerobic biological treatment means is eliminated and the treatment of the waste water with the high efficiency and the decreased amt. of the sludge to be generated is permitted. |
