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Biologically Assisted Control of Selenium in Process Waste Waters.

Authors
Larsen-DM; Gardner-KR; Altringer-PB
Source
Ch 22 in Biotechnology in Minerals and Metals Processing Soc Min Eng AIME 1989 :9 pages
Link
NIOSHTIC No.
10006859
Abstract
The U.S. Bureau of Mines is conducting batch and small-scale continuous laboratory studies on the biologically assisted removal of selenium from process waste waters. Mixed cultures of gram- negative bacteria isolated from several brackish water marshes are capable of reducing selenate [se(VI)] to selenite [se(IV)] and precipitating an amorphous elemental selenium product. Selenium extractions ranged from 80 to 96 pct regardless of the initial selenium concentration. The conditions for rapid bacterial growth and reactor design for optimal selenium removal have been investigated. The mechanisms of bacterial reduction and the rate of selenium removal for scaleup to larger systems are discussed.
Publication Date
19890101
Document Type
OP;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
OP 52-89
NIOSH Division
SLRC;
Source Name
Ch. 22 in Biotechnology in Minerals and Metals Processing. Soc. Min. Eng. AIME, 1989, Pp177-185
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