| 摘要 |
<p>1328812 Purifying effluent MONO PUMPS (ENG) Ltd 13 Oct 1971 [13 Oct 1970] 48665/70 Heading C1C A method of treating raw sewage effluent comprises macerating the effluent, passing it to a vessel containing a submerged bed of plastics pieces, passing air through the vessel, and withdrawing the treated effluent at a point above the bed of plastics pieces. In Fig. 1 effluent from sump 10 is macerated at 12 and passed via tube 14 to aeration tank 15 in which the effluent is passed through pieces of plastics tubing of different sizes 27, 26 and treated with upwardly flowing air from diffuser 22, and then the effluent is then passed to settling tank 31. Sludge from tanks 15 and 31 is passed to sludge digester 37 provided with air diffuser 42. The apparatus comprises pipes 29, 45, 46 and 47 to allow recirculation of effluent. The effluent from tank 31 may be passed via a holding tank to secondary aeration and settling tanks.</p> |
