TY - GEN
T1 - Bioaugmentation and biostimulation for enhanced TPHd biodegradation in diesel-contaminated soil
AU - Liu, Pao Wen G.
AU - Whang, Liang-Ming
AU - Yang, M. J.
AU - Fan, Y. C.
AU - Chang, L. H.
AU - Su, S. L.
AU - Chang, T. C.
AU - Cheng, S. S.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - Contamination with petroleum hydrocarbon compounds in soil and groundwater draws attention regarding environmental and healthy issues, resulting in an increased interest in developing innovative and sound technologies for its remediation. Bioremediation of petroleum hydrocarbons has been proposed as an effective, economic, and environmentally-friendly technology, although the presence of contaminantdegrading bacteria and bioavailability of hydrophobic organic compounds (HOCs) to microorganisms could be limiting factors during the biodegradation process. This study investigated the potential application of bioaugmentation and biosurfactants (rhamnolipid) for enhanced biodegradation of diesel-contaminated soil with a series of bench-scale experiments. Measurements of soil total petroleum hydrocarbon-diesel (TPHd) indicated that all eight tested biopiles provided enhanced biodegradation abilities, with respect to both diesel removal efficiency and biodegradation rate, in soil samples contaminated with diesel at a concentration of 20,000 mg-TPHd/kg soil. Molecular methods, including microarray hybridization, terminal restriction fragment length polymorphism (T-RFLP), and denaturing gradient gel electrophoresis (DGGE), were applied to monitor the microbial population dynamics of augmented diesel-degrading bacteria in tested biopiles. The results of microbial community analyses confirmed the application of bioaugmentation in biopiles conducted in this study would be a beneficial measure to increase the microbial diversity of diesel-degrading bacteria and the diesel biodegradation rate.
AB - Contamination with petroleum hydrocarbon compounds in soil and groundwater draws attention regarding environmental and healthy issues, resulting in an increased interest in developing innovative and sound technologies for its remediation. Bioremediation of petroleum hydrocarbons has been proposed as an effective, economic, and environmentally-friendly technology, although the presence of contaminantdegrading bacteria and bioavailability of hydrophobic organic compounds (HOCs) to microorganisms could be limiting factors during the biodegradation process. This study investigated the potential application of bioaugmentation and biosurfactants (rhamnolipid) for enhanced biodegradation of diesel-contaminated soil with a series of bench-scale experiments. Measurements of soil total petroleum hydrocarbon-diesel (TPHd) indicated that all eight tested biopiles provided enhanced biodegradation abilities, with respect to both diesel removal efficiency and biodegradation rate, in soil samples contaminated with diesel at a concentration of 20,000 mg-TPHd/kg soil. Molecular methods, including microarray hybridization, terminal restriction fragment length polymorphism (T-RFLP), and denaturing gradient gel electrophoresis (DGGE), were applied to monitor the microbial population dynamics of augmented diesel-degrading bacteria in tested biopiles. The results of microbial community analyses confirmed the application of bioaugmentation in biopiles conducted in this study would be a beneficial measure to increase the microbial diversity of diesel-degrading bacteria and the diesel biodegradation rate.
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M3 - Conference contribution
AN - SCOPUS:58449110854
SN - 9781604239485
T3 - Battelle Press - 9th International In Situ and On-Site Bioremediation Symposium 2007
SP - 372
EP - 380
BT - Battelle Press - 9th International In Situ and On-Site Bioremediation Symposium 2007
T2 - 9th International In Situ and On-Site Bioremediation Symposium 2007
Y2 - 7 May 2007 through 10 May 2007
ER -