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Steady- and transient-state effects during the biological oxidation of gas-phase benzene in a continuously operated biofilter
Thiyagarajan R. Swaminathan
Published in
2010
Volume: 12
   
Issue: 5
Pages: 525 - 535
Abstract
Biofiltration is an aerobic degradation process in which a well-humidified contaminated air stream is passed through a porous packed medium that supports a thriving population of microbes. The removal of benzene vapor was investigated in a laboratory-scale biofilter packed with compost, inoculated with a mixed microbial consortium. This biofilter was operated continuously in six different phases for a period of 8 months at different flow rates, 0.024-0.144 m3 h-1 with benzene concentrations ranging up to 1.7 g m-3. Under steady-state conditions, the removal efficiencies (REs) in the biofilter was consistently greater than 78% when benzene loading was less than 20 g m-3 h-1. The maximum elimination capacity (EC) achieved in this study is 64 g m-3 h-1 at an inlet loading rate of 128 g m-3 h-1. The response of the biofilter to shutdown, restart operations and fluctuations in inlet con-centration, and flow rate was determined by subjecting the biofilter to inlet loads of up to 120 g m-3 h-1. The biofilter responded effectively to these loading conditions and was found to recover rapidly. The results from this study suggest that a compost biofilter is effective in treating benzene vapor under steady- and transient-conditions. © Springer-Verlag 2009.
About the journal
JournalClean Technologies and Environmental Policy
ISSN1618954X
Open AccessNo
Concepts (28)
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    Aerobic degradation
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    AIR STREAMS
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    BENZENE CONCENTRATION
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    BENZENE VAPORS
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    BIOLOGICAL OXIDATIONS
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    CENTRATION
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    COMPOST
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    COMPOST BIOFILTERS
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    ELIMINATION CAPACITY
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    GAS-PHASE BENZENE
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    Laboratory scale
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    Loading condition
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    Loading rate
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    MIXED MICROBIAL CONSORTIUM
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    Removal efficiencies
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    Removal efficiency
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    REMOVAL OF BENZENE
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    STATE EFFECTS
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    Steady-state condition
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    TRANSIENT LOADING
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    Benzene
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    BIOFILTERS
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    Composting
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    Inlet flow
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    Loading
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    Removal
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    Vapors
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    BIOFILTRATION