Treatment of trichloroethene (TCE) with a fluidized-bed bioreactor
- Univ. of Missouri, Columbia, MO (United States). Dept. of Civil Engineering
Fluidized-bed bioreactors (FBBR`s) offer a promising alternative to existing treatment technologies for the treatment of water contaminated with chlorinated solvents. The objective of this research was to test a laboratory-scale FBBR for removal of trichloroethene (TCE) from groundwater and to study the FBBR kinetic behavior so that field-scale treatment systems could be designed. Phenol was selected as the growth substrate for biofilm-forming microorganisms enriched from activated-sludge because phenol induces enzymes capable of cometabolizing TCE and lesser chlorinated ethenes. The biofilm forming microorganisms were identified as Pseudomonas putida, a common soil bacterium. Experiments with a conventional, single-pass FBBR addressed TCE removal as effected by changes in TCE loading, phenol loading, and media type. In this study, TCE removal using quartz filter sand and garnet filter sand as the biofilm attachment media was measured. Removal ranged from 20 to 60% and was not affected by the media type. Also, removal was not affected by inlet TCE concentration over the range of 100 to 500 {micro}g/L provided the phenol loading was decreased with increasing TCE loading. The FBBR was capable of complete phenol removal at an inlet concentration of 20 to 25 mg/L and an empty-bed contact time of 2.7 minutes. However, the empty-bed contact time was insufficient to sustain greater than 40 to 50% removal of TCE in a nutrient-amended groundwater.
- Sponsoring Organization:
- Environmental Protection Agency, Washington, DC (United States)
- OSTI ID:
- 585741
- Report Number(s):
- CONF-9705104-; TRN: IM9810%%10
- Resource Relation:
- Conference: 12. Annual conference on hazardous waste remediation, Kansas City, MO (United States), 20-22 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the 12. annual conference on hazardous waste research. Building partnerships for innovative technologies; Erickson, L.E.; Rankin, M.M.; Grant, S.C.; McDonald, J.P. [eds.]; PB: 586 p.
- Country of Publication:
- United States
- Language:
- English
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