公开(公告)号：US3591491A

公开(公告)日：1971-07-06

申请号：US3591491D

申请日：1968-10-04

Applicant: EDMUND G SMITH ,  HOOD JOHN W

Inventor： SMITH EDMUND G ,  HOOD JOHN W

IPC: B01D21/00 ,  C02F1/32 ,  C02F3/02 ,  C02F3/12 ,  C02C1/06

CPC classification number: C02F3/1221 ,  B01D21/2427 ,  C02F1/325 ,  C02F3/02 ,  C02F2201/3221 ,  C02F2201/3228 ,  Y02W10/15 ,  Y10S435/813

Abstract: THE METHOD OF TREATING SEWAGE OR OTHER BIODERGRADABLE WASTE MATERIALS IN A SYSTEM INCLUDING AN AEROBIC PROCESS WHEREIN A SETTLEABLE SLUDGE IS FORMED WHICH COMPRISES RETURNING A PART OR ALL OF THE SLUDGE TO A POINT IN ADVANCE OF THE INPUT OF THE AEROBIC PROCESS AND SUBJECTING A SELECTED PORTION OF THE RETURNED SLUDGE TO THE ACTION OF ULTRA VIOLET OR OTHER BACTERIOCIDAL RAYS FOR THE BIOLYSIS OF THE BACTERIA IN SAID PORTION, THE PORTION BEING SELECTED TO MEET THE FOOD REQUIREMENTS OF THE ACTIVE AEROBIC BACTERIA IN THE AEROBIC PROCESS. THE PORTION SUBJECTED TO BIOLYSIS IS SO REGULATED THAT SUBSTANTIALLY ALL OF THE BIODEGRADABLE MATTER IS CONSUMED AND ONLY A RELATIVELY SMALL QUANTITY OF SLUDGE IS REMOVED TO END DISPOSAL.