| 摘要 |
<p>A wastewater treatment apparatus according to the present invention includes a biofilter with a known structure and operating principle, in which organic impurities in the wastewater are removed by means of decomposing microbes. The biofilter has a tank (4) containing fill material (8) which functions as a substrate for microbe growth. Water undergoing treatment is fed into the tank, and after passing through the fill material said water exits to post-treatment. For post-treatment of the waste-water, the apparatus has its own post-treatment unit, or post-filter. The post-filter contains a filter layer (24) with which particles and sludge slicks formed as a result of microbe activity are removed from the water. The material of the filter layer is advantageously mineral wool. The post-filter can be located inside the tank of the biofilter, whereupon the apparatus can be assembled inside one shell structure as an installation-ready package.</p> |
