A batch reactor for monitoring process dynamics during biodegradation of volatile organics

Biotransformation of carbon tetrachloride by various acetate- and nitrate-limited denitrifying consortia

“…The dashed line indicates the aqueous CT concentration predicted by Henry's law if the only loss of CT from the aqueous phase occurred because of sampling and reparti- tioning between the liquid and gas phases. In previous abiotic tests of the bioreactor apparatus (Petersen et al, 1994;Skeen et al, 1994b), measured aqueous CT concentrations coincided with the theoretical Henry's law curve almost exactly. Thus, CT transformation is demonstrated by the fact that the measured CT concentrations over the course of these experiments decrease more rapidly than the theoretical curve.…”

Kinetics of chlorinated ethylene dehalogenation under methanogenic conditions

“…Skeen et al showed that the volatile organic concentration in these reactors remains constant over an extended period if no biomass is introduced to the reactor. 24 Thus, any losses during a test in which biomass is injected are caused by biological activity.…”

Biodegradation of 1,1,1-trichloroethane by a carbon tetrachloride-degrading denitrifying consortium

“…The experimental apparatus used in these tests consisted of 1-L, gas-tight, stainless steel batch reactors equipped for the measurement of pressure, temperature, pH, and oxidation/reduction potential (ORP) and for the collection of both aqueous phase and headspace samples. A detailed description of this apparatus has been provided elsewhere (Skeen et al, 1994b).…”