| 摘要 |
PURPOSE:To simplify the operation and lower the cost by treating organic contaminated water containing phosphoric acid by means of treatment consisting of a biological treatment process and a membrane separating process. CONSTITUTION:Human waste 1 is treated biologically by a biological treatment process such as the active sludge method or the like. Then, a flocculant 4 such as aluminum sulfate, aluminum polychloride or the like is put in active sludge slurry 3 flowing out of the biological treatment process to flocculate most part of soluble PO4<3-> in the active sludge slurry 3. Next, the active sludge slurry 3 with a flocculant 4 put in is compressively put into the UF membrane separation process 5 by a pump to be separated into clean membrane permeating water 6 with zero SS at the low PO4<3-> concentration and concentrated slurry 7. Said membrane permeating water 6 adsorbs and removes organic substances such as soluble COD, chromaticity and the like in an active carbon adsorption tower 8 to prepare treated water 9. By said process, phosphoric acid on can be removed effectively. |
