Column studies on BTEX biodegradation under microaerophilic and denitrifying conditions
Two column tests were conducted using aquifer material to simulate the nitrate field demonstration project carried out earlier at Traverse City, Michigan. The objectives were to better define the effect nitrate addition had on biodegradation of benzene, toluene, ethylbenzene, xylenes, and trimethylbenzenes (BTEX) in the field study, and to determine whether BTEX removal can be enhanced by supplying a limited amount of oxygen as a supplemental electron acceptor. Columns were operated using limited oxygen, limited oxygen plus nitrate, and nitrate alone. In the first column study, benzene was generally recalcitrant compared to the alkylbenzenes (TEX), although some removal did occur. In the second column study, nitrate was deleted from the feed to the column originally receiving nitrate alone and added to the feed of the column originally receiving limited oxygen alone. Although the requirement for nitrate for optimum TEX removal was clearly demonstrated in these columns, there were significant contributions by biotic and abiotic processes other than denitrification which could not be quantified.
- Research Organization:
- Environmental Protection Agency, Ada, OK (United States). Robert S. Kerr Environmental Research Lab.
- OSTI ID:
- 6618399
- Report Number(s):
- PB-93-158962/XAB; EPA--600/J-93/042
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALKYLATED AROMATICS
ANAEROBIC CONDITIONS
AQUIFERS
AROMATICS
BENCH-SCALE EXPERIMENTS
BENZENE
BIOASSAY
BIODEGRADATION
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DENITRIFICATION
DEVELOPED COUNTRIES
ELEMENTS
GROUND WATER
HAZARDOUS MATERIALS
HYDROCARBONS
HYDROGEN COMPOUNDS
MATERIALS
MICHIGAN
NONMETALS
NORTH AMERICA
OIL SPILLS
ORGANIC COMPOUNDS
OXIDATION
OXYGEN
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POLLUTION CONTROL
REMOVAL
STORAGE
TOLUENE
UNDERGROUND STORAGE
USA
WATER
WATER POLLUTION CONTROL
XYLENES