This work focuses on the enrichment of a trichloroethylene (TCE) and 1,1,2,2-tetrachloroethane (TeCA) cometabolizing aerobic microbial consortium from a contaminated site in Northern Italy, for the development of an on-site bioremediation treatment. The goals were: (i) to select the best growth substrate and the best-performing consortium in terms of contaminant degradation capability; (ii) to perform a preliminary suspended-cell kinetic test; (iii) to perform a preliminary evaluation of the feasibility of the co-metabolic treatment of the tested groundwater in a packed-bed reactor operating at the site’s temperature (15°C). The best degradation results were obtained with a butane-growing consortium. At 15° C, the selected culture resulted in short lag-times for the onset of butane utilization (< 1 day) and TCE and TeCA degradation (< 1 - 8 days). Once immobilized on 4 different porous carriers, the selected consortium was able to grow and form a stable biofilm. The TCE and TeCA degradation rates resulted similar for the 4 carriers tested. Further experiments are in progress to estimate the kinetic parameters of the co-metabolic processes and to understand which carrier leads to the best performances in a continuous-flow packed-bed reactor process.

Aerobic cometabolic bioremediation of an aquifer polluted by chlorinated solvents: preliminary investigation of the feasibility of a packed bed reactor on-site process

CIAVARELLI, ROBERTA;BUCCHI, GIACOMO;ZANAROLI, GIULIO;FRARACCIO, SERENA;FRASCARI, DARIO;PINELLI, DAVIDE;FAVA, FABIO
2012

Abstract

This work focuses on the enrichment of a trichloroethylene (TCE) and 1,1,2,2-tetrachloroethane (TeCA) cometabolizing aerobic microbial consortium from a contaminated site in Northern Italy, for the development of an on-site bioremediation treatment. The goals were: (i) to select the best growth substrate and the best-performing consortium in terms of contaminant degradation capability; (ii) to perform a preliminary suspended-cell kinetic test; (iii) to perform a preliminary evaluation of the feasibility of the co-metabolic treatment of the tested groundwater in a packed-bed reactor operating at the site’s temperature (15°C). The best degradation results were obtained with a butane-growing consortium. At 15° C, the selected culture resulted in short lag-times for the onset of butane utilization (< 1 day) and TCE and TeCA degradation (< 1 - 8 days). Once immobilized on 4 different porous carriers, the selected consortium was able to grow and form a stable biofilm. The TCE and TeCA degradation rates resulted similar for the 4 carriers tested. Further experiments are in progress to estimate the kinetic parameters of the co-metabolic processes and to understand which carrier leads to the best performances in a continuous-flow packed-bed reactor process.
5th International Symposium on Biosorption and Bioremediation: Book of Proceedings
73
76
R. Ciavarelli; G. Bucchi; F. Doria; R. Salviulo; G. Zanaroli; S. Fraraccio; D. Frascari; D. Pinelli; F. Fava
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/128967
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 0
social impact