Biodegradation of petroleum hydrocarbon groundwater in anaerobic column. (Water Quality and Treatment 02:00 PM, Saturday, April 5, 2003 Brewer/Frost Science 138 Dr. Yung-Tse Hung-Presiding).

Hung, Yung-Tse ; Gorla, Nagasekhar Reddy ; Yeh, Ruth Yu-Li 等

2:30

This paper describes a study of a laboratory anaerobic column in bioremediation of petroleum hydrocarbon contaminated groundwater. The objective of the study was to determine the treatment performance of laboratory anaerobic column reactor in removing organic pollutants from the contaminated groundwater. The laboratory anaerobic columns contained aquifer material from a diesel fuel contaminated aquifer. The columns were operated for 65 days at 25[degrees]C with artificial groundwater that contained only S[O.sub.4.sup.2-] and C[O.sub.2] which served as externally supplied oxidants. After 31 days of column operation, a steady state operation was obtained. For a 14 hour hydraulic detention time, about 0.24 mM S[O.sub.4.sup.2-] were consumed and up to 0.012 mM of dissolved [Fe.sup.+2], up to 0.06 mM of [Mn.sup.+2], and up to 0.38 mM of C[H.sub.4] were produced. The alkalinity and the dissolved inorganic carbon concentration increased. In the column, n--alkanes were selectively removed while branched alkanes persisted. The contaminated aquifer materials had an initial total hydrocarbon concentration of 1410 mg hydrocarbon/kg of dry weight of aquifer materials. During the 65 days column study 200 mg hydrocarbon/kg dry weight of aquifer materials was removed by biodegradation. The hydrocarbon concentration in the liquid effluent of column reactor was 0.64 mg/L at day 55 of the study. Results indicated that the anaerobic column can be used to remove toluene, p-xylene and naphthalene from contaminated groundwater effectively.

YUNG-TSE HUNG Y.HUNG@SUOHIO.EDU AND NAGASEKHAR REDDY GORLA REDDYSEKHAR@YAHOO.COM, CIVIL AND ENVIRONMENTAL ENGINEERING DEFT, CLEVELAND STATE UNIVERSITY CLEVELAND OH 44115-2214, RUTH YU-LI YEH, CHEMICAL ENGINEERING DEFT, MING-HSIN UNIVERSITY OF SCIENCE AND TECHNOLOGY, HSINCHU, TAIWAN