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Cost Estimate for Dewatering Alaskan Placer Effluents With Peo.

Authors
Magyar-MJ
Source
NTIS: PB 88-106117 :14 pages
Link
NIOSHTIC No.
10005879
Abstract
This report contains a cost estimate of the Bureau of Mines process for dewatering Alaskan placer effluent streams with polyethylene oxide (peo). In this process, effluent slurry is withdrawn from the placer plant pond system after a primary settling stage. A dilute peo solution is injected into the slurry line to flocculate the fine, suspended solids. The flocculated solids are dewatered on a stationary screen. Clarified water is returned to the placer operation or discharged, while the 35% solids waste is pumped back into the mine cut. Cost estimates are presented for dewatering plants processing 1,000 gallons per minute of effluent slurry at three representative turbidity levels. Both the placer and the dewatering plants operate on the same 1-shift-per-day, 6-day-per- week schedule for the 100-day Alaskan operating season. Estimated fixed capital costs for these plants processing placer with effluent turbidities of 1,000, 3,000, and 5,000 nephelometric turbidity units are approximately $29,000, $31,000, and $34,000, respectively, on a fourth-quarter 1986 basis. Operating costs are estimated to be $0.34, $0.37, and $0.40 Per thousand gallons of effluent slurry, respectively.
Publication Date
19870101
Document Type
CP;
Fiscal Year
1987
NTIS Accession No.
PB88-106117
NTIS Price
A03
Identifying No.
OFR 39-87
NIOSH Division
WO;
Source Name
NTIS: PB 88-106117
State
AK;
Performing Organization
Bureau of Mines
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