| 摘要 |
<p>A system comprises channels 3 for collecting water, the settler 5, tanks 7 and 13 for the waste and cleared water, an intermediate tank 10, a mechanical filter 12 and pumps 6 and 11 for water supply. The channels for collecting water are provided with removable flat filters 4, and between the settler and the pump 11 for delivering water into the mechanical filter there is a device 8 for extraction of petroleum derivatives from sewage.</p> |
