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Reducing Volatile Organic Compound Emissions Using Biotrickling Filters and Bioscrubber Systems
 
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1
Department of Environmental Engineering, College of Engineering, University of Mosul, 41001, Mosul, Iraq
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Department of Environmental Technology, College of Environmental Science and Technology, University of Mosul, 41001, Mosul, Iraq
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Department of Mining Engineering, College of Petroleum and Mining Engineering, University of Mosul, 41001, Mosul, Iraq
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Department of Environmental Engineering, Istanbul Technical University, 34469, Istanbul, Turkey
CORRESPONDING AUTHOR
Liqaa I. Saeed
Department of Mining Engineering, College of Petroleum and Mining Engineering, University of Mosul, 41001, Mosul, Iraq
 
 
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ABSTRACT
A comparative study has been conducted for differentiating between attached and suspended growth represented by a lab-scale biotrickling filter and bio-scrubber under anoxic conditions, respectively. However, malodorous Ethanethiol gas (ET) that categorized as one of the volatile organic sulfur compounds (VOSCs) was studied using a variety of settings and parameters. In contrast, NO3− can be used as an electron acceptor in the bioconversion of ET gas to elemental sulphur and/or sulphate when there is no oxygen around. Empty bed residence times (EBRTs), gas to liquid ratios (G/Ls) (40, 60, 80, 100, 150), and inlet concentrations (150, 300, 800, and 1500 mg/m3) were all investigated in relation to ET's removal efficiency (RE) (30, 60, 90, and 120 s). While the G/L ratio of 80 resulted in efficient ET removal (more than 90.8% for 150 mg/m3 of inlet concentration), it could only achieve the extraction of 80.6% for 1500 mg/m3 of inlet concentration at a fixed EBRT of 60 s. These results were based on the performance of a lab-scale anoxic biotrickling filter. Even though mass transfer constraints and poor solubility of ET were factors, the biotrickling filter's performance under anoxic settings was superior to that of the bio-scrubber and improved the low oxidation rates of ET.