公开(公告)号：US10336633B2

公开(公告)日：2019-07-02

申请号：US15438899

申请日：2017-02-22

Applicant: PHILLIPS 66 COMPANY

Inventor： Gennaro Dicataldo ,  Joshua D. Crow ,  Shana L. Bender

IPC: C02F3/12 ,  C12N1/20 ,  C02F101/16 ,  C02F103/36

Abstract: Processes and systems for maintaining a live culture of activated sludge in the activated sludge unit of a petroleum refinery during an extended refinery shut-down. In the absence of a source of refinery wastewater, a living culture of activated sludge comprising aerobic prokaryotes and/or eukaryotes that nitrify ammonia is maintained by redirecting at least a portion of clarified wastewater leaving the clarifier portion of an activated sludge unit. The redirected clarified wastewater is mixed with an organic food source that may be ammonia and/or ethyl acetate, a source of phosphate ion, and the pH is adjusted to produce a growth media that is returned to the aeration chamber of the activated sludge unit. After a time exceeding one week, the input of refinery wastewater to the aeration chamber is resumed while discontinuing the redirecting of the clarified wastewater.

公开(公告)号：US10239773B2

公开(公告)日：2019-03-26

申请号：US15438923

申请日：2017-02-22

Applicant: PHILLIPS 66 COMPANY

Inventor： Gennaro Dicataldo ,  Joshua D. Crow ,  Shana L. Bender

IPC: C02F3/12 ,  C02F101/16 ,  C02F103/36

Abstract: The present disclosure relates generally to processes and systems for maintaining a live culture of microorganisms in the activated sludge unit of a refinery during an extended refinery shut-down.