| 摘要 |
A decisive factor for the efficiency of biological waste water purification plants is the bacterial mass to be retained in an aerated tank or pond, which bacterial mass, because of the prevailing flow conditions, is subject to continuous loss. In particular, microorganisms which multiply or grow slowly can, as a result, often participate in the degradation processes only in too small a number. The installation of vertically percolated fixed bed bodies has therefore proved optimal for the growth of these microorganisms in activated sludge plants having compressed air aeration. The present invention of a horizontally percolated, fixed bed body floating beneath the surface offers the possibility of also utilizing this modification in other aerated waste water tanks or ponds. The fixed bed body according to the invention is composed of a hollow body lying beneath the water, open crosswise, and made of plastic, which is connected to a buoyancy body included in the upper part or externally mounted. By joining together or chaining a plurality of fixed bed bodies, the waste water-filled tank or pond profile, in the horizontal direction of flow, can be completely or partially covered or completely covered only in the projected area. As a result, a continuous forced contact of the substances contained in the waste water with the sessile microorganisms is induced. Because of the cavity formation in the fixed bed body, a free sludge discharge downwards is ensured, so ... Original abstract incomplete.
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