Water supply and yield analysis. Final technical report, November 1980-May 1982. [Proposed WyCoalGas project, Converse County, Wyoming]

Technical Report · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6739940

Projected raw water requirements at the plant site are 6020 acre-feet per year. Since the proposed plant site is not adjacent to any major streams or rivers, water must be transported to it. Water will be supplied from four sources - two surface water and two groundwater. The two surface water sources are LaPrele Reservoir and a permit from the North Platte River with a 1974 appropriation date. The groundwater sources are derived from the Madison formation aquifer and the Lance-Fox Hills aquifer. Raw water will be brought into the plant through pipelines terminating in a 20-acre, onsite storage impoundment. This impoundment will be large enough to provide all plant makeup requirements for 5 days, at full capacity. It will also provide water for fire fighting. Water from the impoundment will be pumped to cold lime treaters, where it will be clarified and softened with cold lime, magnesium oxide, and soda ash. The treated water will be filtered, then pumped into a header which supplies water for the boiler feedwater makeup treatment system. No further treatment of this water would be required prior to its use as utility cooling tower makeup water. Underflow from the clarifier will be pumped to the settling pond where the water will be decanted from the suspended solids and reclaimed. Plant site domestic and construction water will be supplied by groundwater wells capable of producing 400 acre-feet per year. Two of the plant objectives are to insure there is zero aqueous plant discharge and to minimize plant demand for offsite water. Therefore, the wastewater treatment systems will reduce the contaminants present in plant wastewater discharges so that the water can be reclaimed for use either as boiler feedwater or as cooling tower makeup water.

• Research Organization: WyCoalGas, Inc., Douglas, WY (USA)
• DOE Contract Number: FC02-81RA50404
• OSTI ID: 6739940
• Report Number(s): DOE/RA/50404-1232-App.D-Vol.1; ON: DE83001054
• Country of Publication: United States
• Language: English

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