| 摘要 |
<p>PURPOSE:To provide a method for treatment of waste water which makes flow rate control and cleaning of a bio-filtering tank possible by a simple structure. CONSTITUTION:After waste water is transferred into the first and the second anaerobic tanks 1 and 2, it is introduced into a bio-filtering tank 7 from the upper part of the tank by means of the first pump 8 and is passed through a particulated filter material layer 9 to clean it. When back washing is performed, the filter material in the particulated filter material layer 9 is transferred into a separation tank 12 by means of the second pump 11 while it is washed and in the separation tank 12, it is separated into the filter material and sludge. The filter material is returned to the bio-filtering tank 7 through a filter material returning hole of the lower part of the separation tank 12.</p> |
