公开(公告)号：US3607735A

公开(公告)日：1971-09-21

申请号：US3607735D

申请日：1969-07-02

Applicant: AIR REDUCTION

Inventor： HOVER HOWARD K ,  HUIBERS DERK TH A ,  SERKANIC LAWRENCE J JR

IPC: C02F3/22 ,  B01D21/00 ,  C02F3/12 ,  C02F3/26 ,  C02C1/08

CPC classification number: C02F3/26 ,  B01D21/0018 ,  B01D21/0039 ,  B01D21/0042 ,  B01D21/04 ,  B01D21/2405 ,  B01D21/34 ,  C02F3/1284 ,  C02F2307/08 ,  Y02W10/15

Abstract: Sewage effluent from a primary treatment plant is initially pumped to a vacuum deaerator for removal of dissolved air and hence nitrogen, from the effluent stream. This stream, deaerated as required, is joined with a stream of recycled activated sludge and a stream of pure oxygen in quantity sufficient to meet the ''''biological oxygen demand'''' (BOD) of the combined effluent and recycled activated sludge. The confluence is pumped through an underground pipeline reactor having a static mixer for enhancing contact between the oxygen, aerobic bacteria and organic pollutants. The reactor stream BOD is progressively reduced to the required level at the reactor outlet. A downstream clarifier separates the reactor activated sludge from treated waste water and separated sludge in part is returned for recycling to the inlet of the reactor. The clear waste effluent from the clarifier is sent to tertiary treatment units or to receiving waters.

公开(公告)号：US3521458A

公开(公告)日：1970-07-21

申请号：US3521458D

申请日：1967-07-19

Applicant: AIR REDUCTION

Inventor： HUIBERS DERK TH A ,  HEMSTREET RUSSELL A ,  HOVER HOWARD K

IPC: F25J1/00

CPC classification number: F25J1/001 ,  F25J1/0052 ,  F25J1/0065 ,  F25J1/0204 ,  F25J1/0276 ,  F25J2205/20