Journal
BIOTECHNOLOGY ADVANCES
Volume 30, Issue 6, Pages 1707-1720Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biotechadv.2012.08.009
Keywords
Biological gas treatment; Bioreactor configuration; Mass transfer; Microbiology; Two-phase partitioning bioreactor; Volatile organic compounds
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Funding
- Spanish Ministry of Economy and Competitiveness [RYC-2007-01667, JCI-2011-11009, CTQ2009-07601, CONSOLIDER-CSD 2007-00055]
- Regional Government of Castilla y Leon [VA004A11-2, GR76]
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Biological processes are considered to be the most cost-effective technology for the off-gas treatment of volatile organic compounds (VOC) at low concentrations. Two-phase partitioning bioreactors (TPPBs) emerged in the early 1990s as innovative multiphase systems capable of overcoming some of the key limitations of traditional biological technologies such as the low mass transfer rates of hydrophobic VOCs and microbial inhibition at high VOC loading rates. Intensive research carried out in the last 5 years has helped to provide a better understanding of the mass transfer phenomena and VOC uptake mechanisms in TPPBs, which has significantly improved the VOC biodegradation processes utilizing this technology platform. This work presents an updated state-of-the-art review on the advances of TPPB technology for air pollution control. The most recent insights regarding non-aqueous phase (NAP) selection, microbiology, reactor design, mathematical modeling and case studies are critically reviewed and discussed. Finally, the key research issues required to move towards the development of efficient and stable full-scale VOC biodegradation processes in TPPBs are identified. (c) 2012 Elsevier Inc. All rights reserved.
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