Methods for removing pollutants from water and waste water...

Details Methods for removing pollutants from water and waste water... Methods for removing pollutants from water and waste water...

C - Chemistry, Metallurgy

02

F

362/54

C02F 1/52 (2006.01)

Patent

CA 1204887

METHODS FOR REMOVING POLLUTANTS FROM WATER AND WASTE WATER AND FOR REDUCING SLUDGE RESISTANCE TO DEWATERING by JAMES J. RUSS and JOHN W. SMITH and JANET S. CONDRA ABSTRACT OF THE DISCLOSURE A method for treating water or waste water to remove pollutants therefrom includes treating fly ash comprising aluminum, iron and silica with an aqueous base, recovering a base-treated, solid fly ash, washing the base-treated solid fly ash with water, recovering a rinsed, base-treated fly ash solid, reacting the rinsed, base-treated fly ash solid with mineral acid, and recovering an aqueous, solubilized acidic fly ash leachate, then mixing the aqueous, acidic solubilized fly ash leachate with water or waste water to remove pollutants therefrom, or with sludge to reduce its resistance to dewatering.

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