Liquid purification or separation – Processes – Treatment by living organism
Patent
1995-03-27
1996-09-24
Wyse, Thomas G.
Liquid purification or separation
Processes
Treatment by living organism
210622, 210626, 210908, C02F 312
Patent
active
055587747
ABSTRACT:
A wastewater feed containing an ultimate BOD/COD ratio >0.6 is well-suited for especially acclimated thermophilic and/or caldo-active living micro-organisms ("hot cells") which thrive in an autothermal aerobic (ATA) reaction zone having an ATA bioreactor ("ATAB") operating at substantially ambient atmospheric pressure in combination with a MF or UF membrane filtration device from which a solids-free permeate may be withdrawn. This combination, of ATAB and membrane device is a "membrane bioreactor" (ATA MBR), which operates autothermally with a feed containing biodegradable organic materials having a BOD of at least 5,000 mg/L, preferably at least 10,000 mg/L (10 g/L) with a minor portion of "municipal" wastewater or domestic sewage. Operation of the ATAB, preferably in the thermophilic range from 45.degree. C.-75.degree. C., with constant HRT from 1 to 12 days, is contingent upon maintaining a stable population of live hot cells. Such cells enhance the biokinetics of degradation and allow operation of the ATAB at higher COD loading and a lower concentration of TSS, than would be possible at a lower temperature. A surprisingly high membrane productivity allows production of much less sludge to be disposed of outside the system, than would have to be disposed of with a conventional mesophilic reactor in normal operation with a HRT of less than 24 hr. A combination of an MP MBR with an ATA MBR is highly effective when the MPB produces high BOD concentration mixed liquor for destruction by the ATAB.
REFERENCES:
patent: 3472765 (1969-10-01), Budd et al.
patent: 4655928 (1987-04-01), Milton et al.
patent: 4749494 (1988-06-01), Tomoyasu et al.
patent: 4787978 (1988-11-01), Nicol
patent: 4883594 (1989-11-01), Sekoulov et al.
patent: 4904387 (1990-02-01), Jordan
Behmann Henry
Tonelli Fernando A.
Lobo Alfred D.
Wyse Thomas G.
Zenon Environmental Inc.
LandOfFree
Aerated hot membrane bioreactor process for treating recalcitran does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Aerated hot membrane bioreactor process for treating recalcitran, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aerated hot membrane bioreactor process for treating recalcitran will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1926551