Accession Number : ADA332940

Title :   Pilot Demonstration of Nitrate-Based Bioremediation of Fuel-Contaminated-Aquifer at Eglin AFB, Florida: Site Characterization, Design, and Performance Evaluation

Descriptive Note : Final rept., Oct 92-Sep 96

Corporate Author : ROBERT S KERR ENVIRONMENTAL RESEARCH LAB ADA OK

Personal Author(s) : Hutchins, S. R. ; Miller, D. E. ; Thomas, J. M. ; Ward, C. H. ; Wiesner, M. R.

PDF Url : ADA332940

Report Date : APR 1997

Pagination or Media Count : 240

Abstract : The objective of this research was to compare the extent of bioremediation of a fuel-contaminated aquifer using aerobic recharge with and without nitrate addition. This research was undertaken to provide a direct comparison through the operation of a pilot project at a JP-4 jet fuel-contaminated aquifer at Eglin AFB, FL. Nitrate can serve as an electron acceptor and results in anaerobic biodegradation of organic compounds via the processes of nitrate reduction and denitrification. Because nitrate is less expensive and more soluble than oxygen, it may be more economical to remediate fuel-contaminated aquifers using nitrate rather than oxygen. The pilot project treatment system consisted of two adjacent 100-foot x 100-foot cells that received nitrate-amended and unamended recharge, respectively, through sprinkler application. Performance was continuously monitored through the use of both conventional and cluster wells located within and outside of the treatment cells. Performance evaluation, consisting of extensive chemical, microbial, and toxicological analyses of aquifer sediments and groundwater, were conducted after 4 and 12 months of operation to provide a thorough evaluation of the extent of nitrate-based bioremediation. Results showed recharge application had a positive effect on both cells, resulting in decreased contaminant loads, increased nutrient distribution, increased microbial populations, and decreased sediment toxicity.

Descriptors :   *AQUIFERS, *ENVIRONMENTAL PROTECTION, *NITRATES, PILOTS, FUELS, CONTAMINATION, BIODEGRADATION, POLLUTION, AEROBIC PROCESSES, FLORIDA.

Subject Categories : Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE