Method and system for waste treatment
First Claim
1. A method for treating raw sewage comprising the steps of:
- a. screening influent sewage to divide the influent sewage into solid waste matter and screened waste fluid;
b. incinerating the solid waste matter;
c. centrifuging the screened waste fluid to divide the screened waste fluid into sludge and clarified liquid;
d. incinerating the sludge;
e. passing ozone bubbles through the clarified liquid to divide the clarified liquid into foam entrapped solids, solids adhering to ozone bubbles, and disinfected liquid;
f. incinerating the foam entrapped solids and solids adhering to ozone bubbles; and
g. removing the disinfected liquid.
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Accused Products
Abstract
A method for waste treatment including the steps of and the associated apparatus for removing large solid waste from the influent raw sewage, transmitting the large solid waste to an incinerator, subjecting the resultant liquor to centrifuging to separate additional suspended solids therefrom, passing the additional suspended solids to the incinerator, subjecting the remaining clarified liquid to ozonation to entrap and bubble out remaining solids, to oxidize residual organic contaminants in the liquid, and to disinfect the liquid, and transmitting the solids to the incinerator. The effluent liquid resulting from ozonation can be recycled or discharged into a suitable receptacle, or it may be treated further by activated charcoal and/or reverse osmosis or similar tertiary treatment technique before recycling or discharging.
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Citations
20 Claims
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1. A method for treating raw sewage comprising the steps of:
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a. screening influent sewage to divide the influent sewage into solid waste matter and screened waste fluid; b. incinerating the solid waste matter; c. centrifuging the screened waste fluid to divide the screened waste fluid into sludge and clarified liquid; d. incinerating the sludge; e. passing ozone bubbles through the clarified liquid to divide the clarified liquid into foam entrapped solids, solids adhering to ozone bubbles, and disinfected liquid; f. incinerating the foam entrapped solids and solids adhering to ozone bubbles; and g. removing the disinfected liquid. - View Dependent Claims (2, 3, 4, 5)
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6. A waste treatment system suitable for use aboard marine vessels and in mobile land vehicles comprising:
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influent screen means adapted to receive influent sewage from a source of sewage, said influent screen means adapted to separate influent sewage into solid waste matter and screened waste liquid; an evaporator/incinerator including burner means adapted for incinerating the solid waste matter; means for transferring the solid waste matter from said influent screen means to said evaporator/incinerator; receiving means for receiving screened waste liquid from said influent screen means; means for transferring waste liquid from said screen means to said receiving means; centrifuge means adapted to separate sludge from clarified liquid in the screened waste liquid; means for transferring the screened waste liquid from said receiving means to said centrifuge means; means for withdrawing the sludge from said centrifuge means and passing said sludge to the evaporator/incinerator; ozonator means for receiving the clarified liquid, said ozonator source generally adapted to disinfect said clarified liquid and to remove a substantial portion of suspended solids from the clarified liquid, said ozonator means including; a source of ozone, at least one reactor column adapted to receive the clarified liquid for reaction with the ozone, diffuser means in each reactor column for introducing and evenly dispersing ozone bubbles within the clarified liquid to provide gas-to-liquid contact, and means for supplying ozone from said ozone source to said diffuser means; means for transferring clarified liquid from said centrifuge means to each of said reactor columns; means for removing the removed solids contained generally in a foam formed on the surface of clarified liquid in each reactor column and for passing the solids to said evaporator/incinerator; and means for withdrawing the remaining disinfected liquid from said ozonator means. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification