The capacity of natural bacteria to aerobically degrade hydrocarbon vapors was measured and modeled to assess the potential of bioventing to reduce exhaust vapor treatment requirements at a petroleum spill site. Five sets of aerobic soil microcosms from the vadose zone of a Massachusetts Highway Department contaminated right-of-way were dosed with different initial petroleum vapor standard concentrations, then monitored by gas chromatographic analysis over a 55-day period. The five sets yielded an average maximum reaction rate of 20 μg/m3(soil gas)-sec, which compared favorably with studies of light hydrocarbon vapor degradation in sandy soils from other sites. The calibrated rate was incorporated into a steady-state bioventing model that simulated the evaporation of 34 000 L of petroleum over a 170-year natural release period and an 8-year accelerated release period for 10-day residence time. Aerobic degradation for a 10-day residence time reduced exhaust vapor concentrations by over 100 percent for natural release rates, with a 13 percent reduction under accelerated conditions.
Aerobic Biodegradation of Petroleum-Contaminated Soil: Simulations from Soil Microcosms
Transportation Research Record
Transportation Research Record: Journal of the Transportation Research Board ; 1546 , 1 ; 121-130
1996-01-01
Article (Journal)
Electronic Resource
English
Aerobic Biodegradation of Petroleum-Contaminated Soil: Simulations from Soil Microcosms
Online Contents | 1996
|Aerobic Biodegradation of Petroleum-Contaminated Soil: Simulations from Soil Microcosms
Transportation Research Record | 1996
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