You are here:
TREATMENT OF HAZARDOUS LANDFILL LEACHATES AND CONTAMINATED GROUNDWATER
Citation:
Ahlert, R. AND D. Kosson. TREATMENT OF HAZARDOUS LANDFILL LEACHATES AND CONTAMINATED GROUNDWATER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-88/064.
Description:
The objectives of the Cooperative Agreement were to assess the actual application of separate or combined biological and physical/chemical treatment techniques to high-strength hazardous dumpsite or landfill leachates, extractable wastes and spills, or sludges. our types of real-world toxic, concentrated, complex wastes served as prototype waste streams: industrial landfill leachate, leachate from an industrial sludge impoundment, forced extract from impounded industrial sludge, and groundwater contaminated with chlorinated solvent. erobic and anaeroblc mixed microbial treatment, flocculation/precipitation, UF, and Ro were among techniques evaluated in bench-and laboratory-scale experiments. n general, some physical/chemical pretreatment was required to obtain efficient biodegradation. iorector effluent could be "polished" by UF, RO, or ion exchange to meet National Pollutant Discharge Elimination System (NPDES) standards. ield pilot plants were conducted and operated to demonstrate sequential aerobic/anaerobic soil-based microbial treatment for leachates from two CERCLA-NPL sites and for groundwater contaminated with 1,1,1-trochloroethane at a third site. ven in the presence of high concentrations of inorganic salts, organic carbon reductions up to 99% were readily achieved. he levels of chlorinated solvents extracted in subsurface water were reduced from 5 ng/l to less than 20 ng/l (greater than 99.6%). he contaminant reductions attained are not the greatest that could be achieved with the demonstrated technology, but do reflect pragmatic, cost-effective treatment levels.