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2012, Volume 6, Issue 5

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Frontiers of Environmental Science & Engineering >> 2012, Volume 6, Issue 5 doi: 10.1007/s11783-011-0367-6

Biodegradation of 2-methylisoborneol by bacteria enriched from biological activated carbon

1. Department of Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Water Quality Monitoring Center, Beijing Waterworks Group, Beijing 100085, China

Available online: 2012-10-01
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Abstract

One of the most common taste and odour compounds (TOCs) in drinking water is 2-methylisoborneol (2-MIB) which cannot be readily removed by conventional water treatments. Four bacterial strains for degrading 2-MIB were isolated from the surface of a biological activated carbon filter, and were characterized as spp., spp., spp. and spp. based on 16S rRNA analysis. The removal efficiencies of 2-MIB with initial concentrations of 515 ng·L were 98.4%, 96.3%, 95.0%, and 92.8% for spp., spp., spp. and spp., respectively. These removal efficiencies were slightly higher than those with initial concentration at 4.2 mg·L (86.1%, 84.4%, 86.7% and 86.0%, respectively). The kinetic model showed that biodegradation of 2-MIB at an initial dose of 4.2 mg·L was a pseudo-first-order reaction, with rate constants of 0.287, 0.277, 0.281, and 0.294 d , respectively. These degraders decomposed 2-MIB to form 2-methylenebornane and 2-methyl-2-bornane as the products.

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