Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
January 1999
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Fluidized-Bed Adsorption Bioreactor for the Treatment of
Groundwater Contaminated with Solvents at Low Concentration
6. AUTHORS
Paul H. Miyares, Cynthia V. Teeter, and C. James Martel
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 99-1
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Office of the Strategic Environmental Research and Development Program
Washington, D.C.
For conversion of SI units to non-SI units of measurement consult Standard Practice for Use of the
11. SUPPLEMENTARY NOTES
International System of Units (SI), ASTM Standard E380-93, published by the American Society for Testing and Materials,
100 Barr Harbor Drive, West Conshohocken, Pa. 19428-2959.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161.
13. ABSTRACT (Maximum 200 words)
Volatile organic compounds (VOCs) are a major source of water contamination in the U.S. They pose a threat to
the environment and are a potential hazard to human health. Trichloroethylene (TCE) is the most common of these
pollutants. TCE is usually remediated through pumping and treating it, using either air stripping or granular acti-
vated carbon. Bioremediation is an alternative treatment that uses microbes to convert hazardous substances into
nonhazardous compounds. A fluidized bed adsorption bioreactor is examined here for the treatment of ground-
water contaminated at low concentrations. This pilot study showed that the packed adsorbent bed could be loaded
in approximately 36 hours at a flow rate of 120 mL/min. The remediation phase of the process took approximately
13 days. The reduction in the TCE concentration in the sorbent during each round indicated that it was being
remediated by the microbiological process. Areas that need to be improved are the rate of remediation and the
loading capacity of the adsorption beds. Currently, each complete cycle of loading and remediating requires 2
weeks while only mineralizing 58 mg of TCE per column.
14. SUBJECT TERMS
15. NUMBER OF PAGES
17
Bioremediation
Trichloroethylene (TCE)
16. PRICE CODE
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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