Method using membrane bioreactor with reduced air scour...

Details Method using membrane bioreactor with reduced air scour... Method using membrane bioreactor with reduced air scour...

2009-04-20

2011-11-08

Barry, Chester (Department: 1778)

Liquid purification or separation

Processes

Treatment by living organism

C210S621000, C210S622000, C210S631000, C210S797000

Reexamination Certificate

active

08052874

ABSTRACT:
In a sewage treatment plant with a membrane bioreactor (MBR), raw untreated or partially treated wastewater (influent) and/or mixed liquor in the intensified process is superoxygenated. In a preferred form of the process the influent is superoxygenated such that membrane air scouring requirements are reduced. Influent may be fed to a swing zone where denitrification and nitrification occur simultaneously through process control. In one embodiment superoxygenation is conducted in an internal recycle stream of the mixed liquor, with oxygen content supersaturated preferably to over 300 parts per million. Due to the active evolution of oxygen gas from the supersaturated stream, occurring preferably by seeding the supersaturated stream with air bubbles, the supersaturated oxygen can serve the dual purposes of meeting process oxygen demands and providing part of air scouring requirements for the membranes.

REFERENCES:
patent: 4192742 (1980-03-01), Bernard et al.
patent: 4556491 (1985-12-01), Spector et al.
patent: 5254253 (1993-10-01), Behmann
patent: 5316682 (1994-05-01), Keyser et al.
patent: 6712970 (2004-03-01), Trivedi
patent: 6743362 (2004-06-01), Porteous et al.
patent: 7147777 (2006-12-01), Porteous
patent: 7311833 (2007-12-01), Yamamoto et al.
patent: 7654728 (2010-02-01), Wood et al.

Affiliated with

Also associated with

Rating

Method using membrane bioreactor with reduced air scour... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method using membrane bioreactor with reduced air scour..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method using membrane bioreactor with reduced air scour... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4291353