公开(公告)号：US3619421A

公开(公告)日：1971-11-09

申请号：US3619421D

申请日：1969-01-31

Applicant: FMC CORP

Inventor： HOBBS MILLICE FLOYD ,  PRETTYMAN RAYBURN W ,  BLAKE JOHN H ,  FISHER ROBERT A

IPC: C02F3/12 ,  C02F3/20 ,  C02C1/12

CPC classification number: C02F3/12 ,  C02F3/20 ,  Y02W10/15

Abstract: The process of this invention deals with the operation of tanks in which sewage is aerated to accomplish homogeneous mixing and fast B.O.D. removal. In the illustrative embodiment, air injection is proportioned so that air dispersers positioned adjacent the effluent side of the aeration tank receive at least 51% of the total air input.

公开(公告)号：US3575850A

公开(公告)日：1971-04-20

申请号：US3575850D

申请日：1969-07-07

Applicant: FMC CORP

Inventor： DAVIDSON ROGER ,  SAKO FUMIO F ,  FISHER ROBERT A ,  PALMER WARREN G

IPC: B01D33/00 ,  C02F3/12 ,  C02F11/12 ,  C02C1/12

CPC classification number: C02F11/123 ,  B01D33/048 ,  B01D33/073 ,  B01D33/463 ,  C02F3/12 ,  Y02W10/15

Abstract: THE METHOD OF TREATING WASTE MATERIALS SUCH AS SEWAGE INVOLVES INTRODUCING RAW SEWAGE INTO A BODY OF AQUEOUS MEDIUM, AERATING SAID BODY OF AQUEOUS MEDIUM, WITHDRAWING A SUFFICIENT VOLUME OF SUBSTANTIALLY SOLIDS FREE LIQUID THROUGH A PERFORATE DRUM SUPPORTED FILTER WHICH IS PARTIALLY SUBMERGED IN SAID BODY OF AQUEOUS MEDIUM TO COMPENSATE FOR THE VOLUME OF INFLUENT WASTE MATERIAL AND THEREBY MAINTAIN A RELATIVELY CONSTANT FOR

SAID BODY OF AQUEOUS MEDIUM, ACCUMULATING SOLIDS ON THE MOVABLE FILTER OPERATING SO THAT IT FILTERS OUT SOLIDS WHILE PASSING THE SUBSTANTIALLY SOLIDS FREE LIQUID AND TRANSPORTING THE SOLIDS ACCUMULATED ON SAID SCREEN TO A POINT OF DISPOSAL WHERE THE SOLIDS ARE DISLODGED FROM THE SCREEN.