ENHANCED ANAEROBIC BIOREMEDIATION OF PETROLEUM HYDROCARBONS IN GROUNDWATER USING SULFATE

摘要

The goal of this remedial effort is to accelerate in situ biodegradation of benzene, toluene, ethylbenzene, and total xylenes (BTEX) and methyl tert-butyl ether (MTBE) in groundwater at a gasoline retail facility in St. Augustine, Florida. Remedial efforts had to be conducted in a cost-effective manner that was not disruptive to ongoing facility operations. To this end aqueous-phase sodium sulfate (NaSO4) and magnesium sulfate (MgSO4) amendments were introduced to the subsurface using existing, soil vapor extraction (SVE) wells and associated piping. Recent evidence shows that sulfate is an effective terminal electron acceptor capable of enhancing microbiological destruction of petroleum plumes (Lovely, et al. 1999 and Anderson and Lovely, 2000). The effectiveness of this remedial effort was measured by periodic collection and analysis of groundwater samples from selected monitoring wells at the site. The remedial actions and groundwater sampling activities, jointly funded by the Florida Department of Environmental Protection (FDEP) and the responsible party were performed in accordance with the Remedial Action Modification Plan (RAMP) approved by the FDEP on February 5, 2001.