Biochemical control of sulfide generated by sulfate-reducing bacteria in an industrial waste treatment system
- Vista Chemical Co., Austin, TX (United States)
Hydrogen sulfide production by sulfate-reducing bacteria (SRB) is common in non-aerated, upstream, equalization tanks that receive process wastewater prior to aerobic treatment. This phenomenon results in increased oxygen demand in the aerobic basin and problems with deposition of metal sulfides. The objective of this research was to develop a method for sulfide control without the use of biocides or release of volatile organics upstream of the treatment basin via sparging to maintain inhibitory levels of dissolved oxygen. Specifically, the addition of nitrate to competitively decrease SRB activity by shifting the microbial activity towards nitrate reduction was evaluated in bench-scale reactors. This shift was found to be favorable as a pretreatment for oxidation of organics in advance of the aerobic treatment process. The addition of nitrate while maintaining low dissolved oxygen had the same effect as a sequenced anaerobic/aerobic treatment process in the removal of organics, yet there were no problems with sulfide generation.
- OSTI ID:
- 31760
- Report Number(s):
- CONF-9410273-; TRN: IM9517%%55
- Resource Relation:
- Conference: 15. annual meeting of the Society of Environmental Toxicology and Chemistry (SETAC), Denver, CO (United States), 30 Oct - 3 Nov 1994; Other Information: PBD: 1994; Related Information: Is Part Of Society of Environmental Toxicology and Chemistry 15th annual meeting: Abstract book. Ecological risk: Science, policy, law, and perception; PB: 286 p.
- Country of Publication:
- United States
- Language:
- English
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