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TECHNOLOGY EVALUATION REPORT: PILOT-SCALE DEMONSTRATION OF A SLURRY-PHASE BIOLOGICAL REACTOR FOR CREOSOTE-CONTAMINATED SOIL
Citation:
Dosani, M. AND e. al. TECHNOLOGY EVALUATION REPORT: PILOT-SCALE DEMONSTRATION OF A SLURRY-PHASE BIOLOGICAL REACTOR FOR CREOSOTE-CONTAMINATED SOIL. U.S. Environmental Protection Agency, Washington, D.C., EPA/540/5-91/009 (NTIS PB93205532), 1993.
Description:
This report documents a pilot-scale test of a slurry-phase biological reactor for treatment of creosote-contaminated soil. he technology used was a reactor system in which an aqueous slurry of soil was mixed with appropriate nutrients and seeded with microorganisms to enhance the biodegradation process. n the 12-wk study, a creosote-contaminated soil from the Burlington Northern Superfund Site in Brainerd, MN, was used to test the slurry-phase reactors. he results of a previously-performed bench-scale study were used to optimize a pilot-scale reactor system [each-reactor-contained 64 L of 3o% slurry (soil: water, w/v)]. he pilot-scale phase utilized an inoculum of indigenous polynuclear aromatic hydrocarbon (PAH) degraders (9-3 x 10' CFU/g of soil), an inorganic nitrogen supplement in the form of NH4-N, and a media broth containing potassium, phosphate, magnesium, calcium, and iron. uring the study, levels of soil-bound and liquid-phase PAHs, total petroleum hydrocarbons (TPHs), nutrients, pH dissolved oxygen, temperature, toxicity, microbial phenotypes, and microbial activity were monitored. he average percent reduction of soil-bound PAHs in five reactors over 12-wk of testing ranged from >72% for 4-through 6-ring PAHs to >98% for 2- and -ring PAHS. he reduction of total PAHs exceeded 87%. his report presents detailed information concerning the operation, sampling and analysis, and results achieved with the pilot-scale slurry-phase bioremediation system.
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TECHNOLOGY EVALUATION REPORT: PILOT-SCALE DEMONSTRATION OF A SLURRY-PHASE BIOLOGICAL REACTOR FOR CREOSOTE-CONTAMINATED SOIL