Abstract
Alleviation of metal inhibition on BTEX degradation using PVA-immobilized degrader (Mycobacterium sp. CHXY119) was investigated. When BTEX of 29 mg L−1 [B:T:E:X = 1:1:1:1 (mg)] was used, more than 99 % of BTEX was simultaneously degraded by the free cells within 170 h. In contrast, BTEX of 114–172 mg L−1 seriously inhibited degradation. High concentrations of metals (Mn2+: 15, Ni2+: 10, and Zn2+: 10 mg L−1) also strongly inhibited BTEX degradation by the free cells at BTEX of 29 mg L−1. Immobilization of degraders alleviated the inhibition of BTEX and heavy metals at high concentrations. A modified non-competitive inhibition model well described the BTEX degradation by the free and immobilized cells in the absence and presence of metal ions (R 2 = 0.92–0.99). The above results provide valuable information on treatment of metal-BTEX co-contaminated wastewater by the immobilized degrader.
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Acknowledgments
The authors would like to thank the National Science Council of the Republic of China, Taiwan, for financially supporting this research under Contract No. NSC 100-2815-C-224-012-E. The authors also wish to thank Mr. Cheng-Ting Tsai of our laboratory (Undergraduate at National Yunlin University of Science and Technology) for data collection.
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Lin, CW., Wu, CH., Sun, HC. et al. Alleviation of metal and BTEX inhibition on BTEX degradation using PVA-immobilized degrader: kinetic model of BTEX degradation. Bioprocess Biosyst Eng 37, 1085–1093 (2014). https://doi.org/10.1007/s00449-013-1080-6
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DOI: https://doi.org/10.1007/s00449-013-1080-6