Groundwater total cyanide treatment method

Details Groundwater total cyanide treatment method Groundwater total cyanide treatment method

1995-06-16

1997-07-15

Hruskoci, Peter A.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210709, 210712, 210725, 210727, 210904, 423367, C02F 156

Patent

active

056479964

ABSTRACT:
A method and apparatus for the removal of total cyanide from aqueous solution. The method includes the steps of placing the aqueous solution into a reaction tank, adding lime, ferrous sulfate, and acid to the solution in the reaction tank and agitating the resultant mixture for a reaction time of about one hour. The agitated mixture is transferred from the reaction tank to a clarifier tank and polyelectrolyte solution is added to induce iron-cyanide complex precipitate coagulation. The apparatus includes a reaction tank to hold the aqueous solution and a lime slurry tank, ferrous sulfate tank and acid tank in flow communication with the reaction tank. A pH control assembly controls the flow of acid from the acid tank into the reaction tank and a reaction tank agitation assembly extends into the interior of the reaction tank. The clarifier feed conduit extends between the reaction tank and a clarifier tank. The apparatus further includes a means for transporting a solution from the reaction tank to the clarifier tank and a polyelectrolyte tank in flow communication with the clarifier feed conduit.

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