US 7,321,073 B2 | ||
Process for treating low solids content hazardous materials | ||
John Woodworth, 1754 N. Nicolas St., Appleton, Wis. 54914 (US) | ||
Filed on Mar. 12, 2004, as Appl. No. 10/799,173. | ||
Prior Publication US 2004/0181113 A1, Sep. 16, 2004 | ||
Int. Cl. A62D 3/34 (2006.01); C02F 11/14 (2006.01) |
U.S. Cl. 588—316 [210/769; 588/406; 588/412] | 6 Claims |
6. A method for treating low solids content sediment from a body of water, said sediment including halogenated organic compound
contaminants, the method comprising the steps of:
(1) dewatering the sediment to obtain a stream having a concentrated solids content of about 50% by weight comprised of inorganic
and organic fractions;
(2) adding air or oxygen, a supplemental fuel, and a reactant to the concentrated solids stream, said reactant selected from
the group consisting of sodium carbonate, sodium hydroxide, hydrogen peroxide, iron, aliphatic hydrocarbons, and mixtures
thereof;
(3) pressurizing the concentrated solids stream to a pressure in the range of about 800 to 2500 psi;
(4) preheating the pressurized stream by passing the stream from step (6) through a heat exchanger;
(5) conveying the preheated stream into a reactor with the fuel addition sufficient to maintain a self-sustaining reaction
temperature to dehalogenate and decompose or denature the contaminant compounds;
(6) returning the dehalogenated and decomposed or denatured stream to the heat exchanger to provide heat for the preheating
step;
(7) reducing the pressure of the stream for further processing; and,
(8) the pressurizing step is performed with a high pressure hydraulic pump, and the step of adding air or oxygen comprises
adding the air or oxygen directly into a suction of the pump.
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