STP1235: In Situ Bioremediation Pilot Study at a Former Manufactured Gas Plant Site

    English, DA
    project Engineer and Project Manager, B&V Waste Science and Technology Corp., Kansas City, MO

    Nelson, JR
    project Engineer and Project Manager, B&V Waste Science and Technology Corp., Kansas City, MO

    Hargens, DA
    Senior Environmental Engineer, IES Industries Inc., Cedar Rapids, IA

    Pages: 23    Published: Jan 1995


    Abstract

    A one-year in situ bioremediation pilot study was implemented in January 1992 at a site contaminated with polynuclear aromatic hydrocarbons, benzene, ethyl benzene, toluene, and xylenes from former manufactured gas plant operations. The objective of the study was to evaluate the effectiveness of in situ bioremediation on high molecular weight hydrocarbons under site conditions.

    The pilot study involved injecting treated groundwater amended with nutrients and oxygen (in the form of hydrogen peroxide) into the subsurface via an injection well, extracting groundwater through a downgradient extraction well, and periodically monitoring the system using monitoring wells and soil borings.

    Results indicate that the site hydrogeology, the high concentrations of target and non-target organics, and the presence of pure-phase coal tar in the subsurface limit the cost-effective application of in situ bioremediation at this site.

    Keywords:

    in situ bioremediation, pilot study, manufactured gas, benzene, toluene, ethyl benzene, xylenes, polynuclear aromatic hydrocarbons, dense nonaqueous phase liquids, hydrogen peroxide, injection well


    Paper ID: STP13030S

    Committee/Subcommittee: F20.15

    DOI: 10.1520/STP13030S


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