Tetrachloroethylene as electron acceptor for the anaerobic degradation of benzoate

Physiological meaning and potential for application of reductive dechlorination by anaerobic bacteria

“…In an anaerobic packed-bed column, tetrachloroethene was completely dechlorinated to ethene at high rates [33]. In enrichment studies with methanol [34] or benzoate [35] plus tetrachloroethene, large amounts of electrons were recovered in dechlorination products (up to 31%) showing that tetrachloroethene served as electron acceptor. Recently, a highly purified enrichment culture, designated PER-K23, was isolated from material of the tetrachloroethene-dechlorinating packed-bed column.…”

The proton/electron ration of the menaquinone-dependent electron transport from dihydrogen to tetrachloroethene in "Dehalobacter restrictus"

“…The first indications of the use of PCE as an electron acceptor supporting bacterial growth were obtained with enrichment cultures on benzoate and PCE (23) or on methanol and PCE (4). It was only recently that two anaerobic bacterial strains were isolated (10,11,24) which conserve their energy for growth by the oxidation of H 2 coupled to the reductive dechlorination of PCE to cis-1,2-dichloroethene (cis-DCE) and chloride as end products:…”

Dechlorination of High Concentrations of Tetrachloroethylene Using a Fixed-bed Reactor

“…TCE and cDCE were the major intermediates in a PCE-degrading anaerobic fixedfilm (fixed-bed) reactor as well as an upflow anaerobic sludge blanket (UASB) reactor, though DCE and VC were also detected. 10,15,18,27,[42][43][44]49,55) UASB reactors are commonly used in the anaerobic treatment of waste water. 48) Dechlorination of PCE has been investigated in a UASB reactor after incorporation of the strictly anaerobic, reductively dechlorinating bacterium Sulfurospirillum multivorans into granular sludge to improve dechlorination of PCE.…”