Process for removal of inorganic and cyanide contaminants from w

Details Process for removal of inorganic and cyanide contaminants from w Process for removal of inorganic and cyanide contaminants from w

1990-05-24

1992-03-03

Silverman, Stanley S.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210717, 210721, 210667, 210684, 210724, 210759, 210763, 210904, 210911, 423 87, 423602, C02F 158, C02F 172

Patent

active

050930079

ABSTRACT:
An improved process for removal of soluble contaminants from wastewater is disclosed which provides significantly enhanced contaminant removal and overall process efficiencies. The improved contaminant removal process is especially suitable for treatment of industrial effluents having high levels of dissolved cyanide and arsenic contaminants. Wastewater undergoes multiple stage sludge treatment, wherein sludge is mixed with wastewater sequentially in a plurality of discrete reaction stages for relatively short retention times. Reaction conditions which promote chemical and/or physical reaction of soluble contaminants with sludge are maintained, and liquid/solids separation is effected after each sludge treatment stage. Oxidizing agent is preferably mixed with the wastewater prior to multiple stage sludge treatment to change the oxidation state of inorganic contaminants and remove cyanide contaminants from solution. Multiple stage sludge treatment may be combined with an improved ferric adsorption process to provide substantially complete removal of inorganic and/or cyanide contaminants.

REFERENCES:
patent: 4288328 (1981-09-01), Montgomery
patent: 4343706 (1982-08-01), Etzel et al.
patent: 4465597 (1984-08-01), Herman et al.
patent: 4566975 (1986-01-01), Allgulon
patent: 4606829 (1986-08-01), Rice et al.
patent: 4622149 (1986-11-01), Devayst et al.
patent: 4705638 (1987-11-01), Ganczarczyk
patent: 4710301 (1987-12-01), Geuens
patent: 4915849 (1990-04-01), Griffiths et al.
"Removal of Arsenic (V) from Water by Adsorption on Aluminum and Ferric Hydroxides", by John H. Gulledge and John T. O'Connor, pp. 548-552, Journal of AWWA, (1973).
Arsenic: Industrial, Biomedical, Environmental Perspectives, W. H. Lederer and R. J. Fensterheim, eds., Van Nostrand Reinhold Company, pp. 272-276.

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