Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-12-26
2006-12-26
Barry, Chester T (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S628000, C210S173000, C210S174000
Reexamination Certificate
active
07153430
ABSTRACT:
The present invention relates to a method for the aerobic digestion of a fluid waste material, notably an aqueous sewage, in which at least part of the waste material and/or of the digestion mixture is comminuted to reduce the median particle size of biomass and other solid particles in the digestion mixture to less than 10 micrometres, for example using destructive cavitation with a pressure drop of from 2 to 7.5 Bar. The comminution produces particles which are preferentially ingested by predator organisms in the digestion stage so that they graze on the bacteria and biomass particles and thus reduce the amount of biomass and suspended solids produced in the digestion stage. The invention also relates to apparatus for use in the method of the invention.
REFERENCES:
patent: 3772188 (1973-11-01), Edwards
patent: 3914164 (1975-10-01), Clark
patent: 4303528 (1981-12-01), Shibayama
patent: 4348285 (1982-09-01), Groeneweg et al.
patent: 4432869 (1984-02-01), Groeneweg et al.
patent: 5282980 (1994-02-01), Kew et al.
patent: 6635178 (2003-10-01), Bowman et al.
patent: 6824086 (2004-11-01), Mazurkiewicz et al.
patent: 4114694 (1992-11-01), None
patent: 4204607 (1993-08-01), None
patent: 4214607 (1993-08-01), None
patent: 9802339 (2000-02-01), None
patent: 10000493 (1998-01-01), None
Miquelis et al. “Impact of Turbulence and Turbidity on the Grazing Rate of the Rotifer Brachionus Calyciflorus (Pallas).” Hydrobiologia. vol. 386. 1998. pp. 203-211.
Rensink et al. “Using Metazoa to Reduce Sludge Production.” Wat. Sci. Tech. vol. 36—No. 11. pp. 171-179.
Schubert et al. “Particle Size Distribution in Effluent of Trickling Filters and in Humus Tanks.” Wat. Res. vol. 35—No. 16. 2001. pp. 3993-3997.
Low et al. “Reducing Production of Excess Biomass During Wastewater Treatment.” Wat. Res. vol. 33—No. 5. 1999. pp. 1119-1132.
Lubzens et al. “Mariculture in Israel—Past Achievements and Future Directions in Raising Rotifiers as Food for Marine Fish Larvae.” Hydrobiologia. vol. 358. 1997. pp. 13-20.
Lee et al. “Reducing Sludge Production in Aerobic Wastewater Treatment Through Manipulation of the Ecosystem.” Wat. Res. vol. 30—No. 8, 1996. pp. 1781-1790.
Attetia et al. “Aggregation Rates of Natural Particle Populations.” Wat. Res. vol. 35—No. 10. 2001. pp. 2429-2434.
Dalentoft et al. “The use of The Kaldness Suspended Carrier Process in Treatment of Wastewaters from the Forest Industry.” Wat. Sci. Tech. vol. 35—No. 2, 3. 1997. pp. 123-130.
Dezfuli et al. “The Origin and Function of Cement Gland Secretion in Pomphorhynchus laevis (Acanthocephala).” Parasitology. vol. 19, 1999. pp. 649-653.
Calaway, W.T. “The Metazoa of Waste Treatment Processes—Rotifiers.” Journal WPCF. vol. 40—No. 11. pp. R412-R422.
Snidaro et al. “Characterization of Activated Sludge Flocs Structure.” Wat. Sci. Tech. vol. 36—No. 4. 1997. pp. 313-320.
Vladstein et al. “Particle Size Dependent Feeding by the Rotifer Brachionus Plicatilis.” Rotifer Symposium VI. 1993. pp. 261-267.
Weemaes et al. “Evaluation of Current Wet Sludge Disintegration Techniques.” J. Chem. Technol. Biotechnol. vol. 73. 1998. pp. 83-92.
Mayhew et al. “Low Biomass Yield Activated Sludge: A Review.” Environmental Technology. vol. 18. 1997. pp. 883-892.
International Search Report for PCT/GB03/001007.
Lapinski Jens
Tunnacliffe Alan Garth
Barry Chester T
Bourque and Associates
Cambridge University Technical Services Limited
LandOfFree
Biological digestion of waste fluids with particles... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Biological digestion of waste fluids with particles..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Biological digestion of waste fluids with particles... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3701408