| 摘要 |
<p>PCT No. PCT/NL92/00119 Sec. 371 Date Dec. 30, 1993 Sec. 102(e) Date Dec. 30, 1993 PCT Filed Jul. 2, 1992 PCT Pub. No. WO93/01137 PCT Pub. Date Jan. 21, 1993.The invention relates to a device for purifying waste water, comprising a reservoir (2), supply means (3) for the waste water flowing out into the reservoir, means for maintaining a pre-determined fluid level (11) in the upper part of the reservoir and draining means (12) for draining purified water from the reservoir. Said reservoir forms part of a cycle of microbe supporting elements (8) that have a lower density than 1, and comprising means (15) for removing microbe supporting elements from the reservoir operative above the pre-determined level, cleaning means (17) for removing sludge from the supporting elements, and re-introducing means (20) flowing out into the lower part of the reservoir for re-introducing the cleaned microbe supporting elements.</p> |
