| 摘要 |
<p>The filter unit (6) preceding the activated sludge tank (1) containing the membrane, includes a fine sieve (11) with mesh size below 1 mm. The filter unit is in the form of sieve baskets disposed around a rotary drum, with wash-down sprays and/or compressed air supply directed onto the drum. The filter unit is contained in a separate tank (7). Optional additional features of the activated sludge tank, include nitrification and/or denitrification zones, a grit interceptor and/or a fat separator. An independent claim is also included for the corresponding method of treatment.</p> |
