Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1990-10-31
1992-01-14
Silverman, Stanley S.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210912, 210724, 210804, 210805, 210806, 210748, C02F 162, C02F 154
Patent
active
050808060
ABSTRACT:
A decontamination treatment of process water is disclosed herein originating from electroplating/metal finishing and etching operations wherein the process water is loaded with heavy metal ions. The process combines predetermined quantities of alkali/acid solutions together with a quantity of Sodium Humate so as to produce a disposable sludge which is environmentally safe and poses the least risk for leeching of harmful metals from the resultant sludge. Decontaminated waste water solution is also produced via a sand filter which is further processed to remove ionic, atomic or molecular metal suspended in the waste water solution. This latter process includes a microcon filter having electronic pressure sensors and feedback controls for returning contaminated waste water back into the system via automatic back wash. An electromagnetic ionic filter removes additional ionic, atomic or the like metal contaminants.
REFERENCES:
patent: 4427551 (1984-01-01), Duveau
patent: 4552664 (1985-12-01), Benner
patent: 4746442 (1988-05-01), Calemma et al.
patent: 4789484 (1988-12-01), Yong et al.
patent: 4814091 (1989-03-01), Napier et al.
Marrs Roger A.
McCarthy Neil M.
Silverman Stanley S.
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