Degradation of bisphenol A by microorganisms immobilized on polyvinyl alcohol microspheres
1. State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; 2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake (Ministry of Education), College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China; 3. The Key Laboratory of Water and Sediment Sciences (Ministry of Education), Department of Environmental Engineering, Peking University, Beijing 100871, China
In this study, microorganisms (named B111) were immobilized on polyvinyl alcohol microspheres prepared by the inverse suspension crosslinked method. The biodegradation of bisphenol A (BPA) and 4-hydroxybenzaldehyde, a degradation product of BPA, by free and immobilized B111 was investigated. The BPA degradation studies were carried out at initial BPA concentrations ranging from 25 to 150 mg·L . The affinity constant K and maximum degradation rate were 98.3 mg·L and 19.7 mg·mg VSS·d for free B111, as well as 87.2 mg·L and 21.1 mg·mg VSS·d for immobilized B111, respectively. 16S rDNA gene sequence analyses confirmed that the dominant genera were and for BPA biodegradation in microorganisms B111.