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  • Title: Use of poly-beta-hydroxy-butyrate as a slow-release electron donor for the microbial reductive dechlorination of TCE.
    Author: Aulenta F, Fuoco M, Canosa A, Petrangeli Papini M, Majone M.
    Journal: Water Sci Technol; 2008; 57(6):921-5. PubMed ID: 18413954.
    Abstract:
    In situ anaerobic reductive dechlorination, using slow-release electron donors, is emerging as an effective and sustainable (low-cost and low-maintenance) technology to remediate aquifers contaminated by chloroethenes. In the present study, we investigated the use of poly-beta-hydroxy-butyrate (PHB), a fully biodegradable polymer, as a slow-release source of hydrogen and acetate for the reductive dechlorination of trichloroethene (TCE). Results of this study indicated that TCE dechlorination in PHB-amended microcosms was 2.3-times higher than in non-amended controls. This higher activity was explained by a higher H(2) level in PHB-amended microcosms. As usual, acetate was the major sink (approximately 90%) of reducing equivalents available from PHB degradation, whereas no acetotrophic dechlorination was observed.
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