Efficient Steady-State Volatile Organic Compound Removal from Air by Live Bacteria Immobilized on Fiber Supports
作者:
EvgueniiI. Kozliak,
TanaL. Ostlie-Dunn,
MicheleL. Jacobson,
StevenR. Mattson,
RyanT. Domack,
期刊:
Bioremediation Journal
(Taylor Available online 2000)
卷期:
Volume 4,
issue 1
页码: 81-96
ISSN:1088-9868
年代: 2000
DOI:10.1080/10588330008951134
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Fibers are suggested for bacterial immobilization in trickle-bed bioreactors used for the removal of volatile organic compounds (VOCs) from air. Fiber-based bioreactors retain up to 200 to 300 mg of dry biomass per 1 g of support, which is a much larger value than that of traditional, granule-based bioreactors. Air pollutant removal efficiency for fiber-based bioreactors remains high with large inlet pollutant concentrations or space velocities (lower contact times). Efficient removal is achieved not only for a water-miscible substrate (ethanol), but also for some less water-soluble compounds, such as ethyl acetate and styrene. Specific pollutant elimination capacity per unit fiber-based biocatalyst volume (up to 4000 g/m3-h) exceeds those of biological air purification methods and is comparable to chemical methods. Unlike granule-based biocatalysts, oxygen limitation for pollutant biodegradation is not observed. Evidence obtained shows that the higher air purification efficiency is due to the greater surface-to-volume ratio of fibers when compared with granules, which results in a more efficient substrate mass transfer.
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