Bioremediation of Soils Contaminated with Petroleum Hydrocarbons Using Bioslurry Reactors.
Abstract
The Department of Defense has over 12,000 sites contaminated from military activities. Many sites contain petroleum contamination and residues from fueling, maintenance, and training activities. Use of bioslurry reactors may be an appropriate means for decontaminating these soils. This report presents data from two bench-scale and two pilot-scale studies that evaluated the suitability of the bioslurry process to bioremediate soils contaminated by petroleum hydrocarbons. Soils from two contaminated sites were studied. The first soil contained polycyclic aromatic hydrocarbons (PAHs), BTEX (benzene, toluene, ethylbenzene, and xylene) compounds, ketones, and chlorinated ethanes; the second soil contained gasoline and associated compounds. Conceptual designs and costs of bioslurry processes for field applications are also presented. Bench-scale studies were performed in 5-L batch reactors, equipped with aeration and mixing equipment. Various nutrient amendments, surfactants, and selected microbial consortia were evaluated during the bench-scale studies. Several reactors were also operated using only native microbes. Pilot-scale testing was accomplished using 60-L EIMCO reactors, also equipped with aeration and mixing systems. Off-gases were recirculated, with CO2 removed in a scrubber and additional O2 added as required. jg p76
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1995
- Accession Number
- ADA304237
Entities
People
- Cynthia L. Teeter
- Douglas Gunnison
- M. J. Cullinane
- Mark E Zappi
- Shankha K. Banerji