A kinetic study of butane uptake and trichloroethylene (TCE) aerobic cometabolism was conducted by two suspended-cell (15 and 30°C) and two attached-cell (15 and 30°C) consortia obtained from the indigenous biomass of a TCE-contaminated aquifer. The shift from suspended to attached cells resulted in an increase of butane (15 and 30°C) and TCE (15°C) biodegradation rates, and a significant decrease of butane inhibition on TCE biodegradation. The TCE 15°C maximum specific biodegradation rate was equal to 0.011 mg TCE/mg protein/d with suspended cells and 0.021 mg TCE/mg protein/d with attached cells. The type of mutual butane/TCE inhibition depended on temperature and biomass conditions. On the basis of a continuous-flow simulation, a packed-bed PFR inoculated with the 15°C or 30°C attached-cell consortium could attain a 99.96% conversion of the studied site’s average TCE concentration with a 0.4-0.5-day hydraulic residence time, with a low effect of temperature on the TCE degradation performances.
Dario Frascari, Giulio Zanaroli, Giacomo Bucchi, Antonella Rosato, Nasrin Tavanaie, Serena Fraraccio, et al. (2013). Trichloroethylene aerobic cometabolism by suspended and immobilized butane-growing microbial consortia: A kinetic study. BIORESOURCE TECHNOLOGY, 144, 529-538 [10.1016/j.biortech.2013.07.006].
Trichloroethylene aerobic cometabolism by suspended and immobilized butane-growing microbial consortia: A kinetic study
FRASCARI, DARIO;ZANAROLI, GIULIO;BUCCHI, GIACOMO;ROSATO, ANTONELLA;TAVANAIE, NASRIN;FRARACCIO, SERENA;PINELLI, DAVIDE;FAVA, FABIO
2013
Abstract
A kinetic study of butane uptake and trichloroethylene (TCE) aerobic cometabolism was conducted by two suspended-cell (15 and 30°C) and two attached-cell (15 and 30°C) consortia obtained from the indigenous biomass of a TCE-contaminated aquifer. The shift from suspended to attached cells resulted in an increase of butane (15 and 30°C) and TCE (15°C) biodegradation rates, and a significant decrease of butane inhibition on TCE biodegradation. The TCE 15°C maximum specific biodegradation rate was equal to 0.011 mg TCE/mg protein/d with suspended cells and 0.021 mg TCE/mg protein/d with attached cells. The type of mutual butane/TCE inhibition depended on temperature and biomass conditions. On the basis of a continuous-flow simulation, a packed-bed PFR inoculated with the 15°C or 30°C attached-cell consortium could attain a 99.96% conversion of the studied site’s average TCE concentration with a 0.4-0.5-day hydraulic residence time, with a low effect of temperature on the TCE degradation performances.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
