Field demonstration of a permeable bioreactive barrier for leachate contaol

摘要

A biostimulation technique was selected for a pilot study to treat groundwater at a former New Jersey municipal landfill. The process will address a mixture of chlorinated compounds (e.g. vinyl chloride and chlorobenzene), hydrocarbons (e.g. benzene and methyl ethyl ketone) and heavy metals. The reactive barrier will be constructed using a series of injection points to implace a slurry of Oxygen Releasing Compound (ORC~(approx R)) to enhance both biological and chemical oxidation of the chemicals of concern through the slow release of oxygen. ORC has been shown to be effective in the treatment of petroleum hydrocarbons (Koenigsberg et al., 1995) as well as some chlorinated hydrocarbons such as vinyl chloride (Dooley et al., 1998). Two mini-barriers, each 90 feet long, were installed at the site in January, 1999. Monitoring points were installed along the centerline of the barriers. Data was collected in two baseline sampling events prior to installation of the system. Data will be collected over an eight month period. Additionally, a companion study will be performed to investigate the viability of a reinjectable point system to reduce on-going operating costs. Data will be gathered to determine life expectancy for such a system.