| 摘要 |
<p>In a continuous process for the purification of sewage by biological means, with or without primary sedimentation (SP), fermented matter is elutriated in the flow of raw or settled sewage (W) directed into a first stage of treatment in an unaerated tank (2), thence into a second stage of treatment in an aerobic tank (3), and thereafter to secondary sedimentation and clarification tanks (SS); the unaerated tank (2) is divided into anaerobic and anoxic sub-environments, each of which divided in turn into diversified treatment sectors (6), sludge is recycled (S) back from secondary sedimentation and clarification (SS) into one of the treatment sectors (6) of the unaerated tank (2), separately from the flow of sewage (W), and liquids (L) are recycled (A) from the aerobic tank (3) likewise into one of the unaerated treatment sectors (6). <IMAGE></p> |
