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Dewatering Electrochemical Machining Sludge.

Authors
Brooks-PT; McDonald-WR
Source
NTIS: PB 252 001 :9 pages
Link
NIOSHTIC No.
10007642
Abstract
Electrochemical machining sludge, a troublesome fluid waste product, was dewatered on a bench-scale basis by three alternative methods tested by the federal Bureau of Mines. These methods would enable recycling 89 percent or more of the liquid content of the sludge and allow the dewatered solids to be dumped as landfill or processed further to recover contained nickel. Dewatering by vacuum precoat filtration was estimated to be the least expensive. Based on treating 20,000 gallons per day of sludge, precoat filtration costs were estimated as totaling 1.96 Cents per gallon of sludge. Two options of an alternative method, comprised of acidification, reprecipitation, thickening, and filtration, were estimated to cost either 3.47 Or 3.60 Cents per gallon of sludge.
Publication Date
19760101
Document Type
IH; Report of Investigation;
Fiscal Year
1976
NTIS Accession No.
PB-252001
NTIS Price
A02
Identifying No.
RI 8113
NIOSH Division
SLRC;
Source Name
NTIS: PB 252 001
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