Anoxic/oxic biodegradation of aminobenzene
- Univ. of Pennsylvania, Philadelphia, PA (United States)
Biodegradation of aminobenzene, which is used as the only source of carbon and nitrogen, is evaluated in a single fluidized bed reactor operated in a temporal, anoxic/oxic mode. The experimental evidence indicates that total organic carbon (TOC) is removed with >91% efficiency at a feed concentration of 100 mg/L and a dilution rate of 2.4 day[sup [minus]1]. Moreover, about 53--63% of feed total Kjeldahl nitrogen (TKN) is also removed, confirming that effective removal of nitrogenous matter in aminobenzene (i.e., the [minus]NH[sub 2] group) is achievable in a temporal, anoxic/oxic environment. The kinetic analysis shows that TOC removal in oxic cycles is rapid and substantial, which enables nitrification to proceed at a discernible rate. In addition, the data on TOC and NO[sub 3][sup [minus]]-N removal in anoxic cycles reveal that carbonaceous matter in aminobenzene and/or its intermediate metabolites is effectively utilized for denitrification. The best treatment performance, in terms of carbon and nitrogen removal and potential savings in aeration costs, is obtained by coupling a 6 h oxic cycle with a 6 h anoxic cycle. All reaction rates estimated in anoxic/oxic experiments remain relatively constant over the range of conditions tested.
- OSTI ID:
- 6439014
- Journal Information:
- Journal of Environmental Engineering, Journal Name: Journal of Environmental Engineering Vol. 125:7; ISSN 0733-9372; ISSN JOEEDU
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
AROMATICS
BENZENE
BIODEGRADATION
CHEMICAL REACTIONS
DECOMPOSITION
HYDROCARBONS
HYDROGEN COMPOUNDS
INDUSTRIAL WASTES
LIQUID WASTES
MANAGEMENT
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION ABATEMENT
PROCESSING
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER POLLUTION ABATEMENT