Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2008-06-10
2008-06-10
Barry, Chester T (Department: 1797)
Liquid purification or separation
Processes
Treatment by living organism
C210S607000, C210S627000
Reexamination Certificate
active
07384555
ABSTRACT:
A process and an apparatus for an aerobic biological treatment of aqueous organic wastes, in which the aqueous organic waste is supplied to an aeration tank for an aerobic biological treatment in the presence of a biosludge composed essentially of aerobic microorganisms. The aerated aqueous suspension in the aeration tank is subjected to solid/liquid, separation, the so-separated liquid phase is removed as treated water, at least a portion of the separated sludge is recycled to the aeration tank, a part of the aqueous suspension in the aeration tank or of the separated sludge is treated with ozone at a pH of 5 or lower, and the ozonized suspension or sludge is recycled to the step of aerobic biological treatment. The biosludge is transformed into BOD components using a decreased amount of ozone to thereby decrease the amount of excess sludge and, in some cases, even reduce it to zero.
REFERENCES:
patent: 3235487 (1966-02-01), Westgarth
patent: 3236766 (1966-02-01), Levin
patent: 3300402 (1967-01-01), Grich et al.
patent: 3591491 (1971-07-01), Smith et al.
patent: 3772188 (1973-11-01), Edwards
patent: 4136023 (1979-01-01), Kirk et al.
patent: 4178239 (1979-12-01), Lowther
patent: 4200524 (1980-04-01), Levin
patent: 4225431 (1980-09-01), De Longe
patent: 4370235 (1983-01-01), Suzuki et al.
patent: 4487699 (1984-12-01), Long, Jr.
patent: 4834872 (1989-05-01), Overath
patent: 4936983 (1990-06-01), Long et al.
patent: 5215554 (1993-06-01), Kramer et al.
patent: 5362395 (1994-11-01), Dorau et al.
patent: 5484549 (1996-01-01), Hei et al.
patent: 5520888 (1996-05-01), Berndt
patent: 6086766 (2000-07-01), Yasui
patent: 521 293 (1972-04-01), None
patent: 2 490 208 (1982-03-01), None
patent: 2668765 (1992-05-01), None
patent: 1 417 573 (1975-12-01), None
patent: 7019100 (1982-02-01), None
patent: 360118299 (1985-06-01), None
patent: 5-23688 (1991-07-01), None
patent: 404225900 (1992-08-01), None
Brock, T.O., Biology of Microorganisms, Prentice Hall,Inc , NJ, 1970 , pp. 202-204 and 214 and 215.
Sotelo et al., Ind. Eng. Chem. Res. 1987, 26 pp. 39-43.
Patent Abstract of Japan—JP-A-04 298 290, published Oct. 1992, vol. 17, No. 113 (Matsushita Electric).
Patent Abstract of Japan—JP-A-61 129 094, published Jun. 1986, vol. 10, No. 318 (Nitto Electric Ind. Co. Ltd.).
Patent Abstract of Japan—JP-A-01 293 103, published Nov. 1989, vol. 14, No. 74 (Kurita Water Ind. Ltd.).
Shibata Masahide
Yasui Hidenari
Barry Chester T
Flynn ,Thiel, Boutell & Tanis, P.C.
Kurita Water Industries Ltd.
LandOfFree
Process for biological treatment of aqueous organic wastes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for biological treatment of aqueous organic wastes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for biological treatment of aqueous organic wastes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2814465