Microbial Chain Elongation and Subsequent Fermentation of Elongated Carboxylates as H₂-Producing Processes for Sustained Reductive Dechlorination of Chlorinated Ethenes

and acetate further sustained the reductive dechlorination activity. Methanogenesis was limited during TCE dechlorination in soil microcosms and absent in transfer cultures fed with chain-elongation substrates. This study provides critical fundamental knowledge toward the feasibility of chlorinated solvent bioremediation based on microbial chain elongation.