Microbial biodegradation of aniline at low concentrations by Pigmentiphaga daeguensis isolated from textile dyeing sludge
2018
Huang, Jiaxing | Ling, Jiayin | Kuang, Chaozhi | Chen, Jinliang | Xu, Yanbin | Li, Yuxin
Biodegradation with some predominated strains would be an effective and economical approach to eliminate aniline selectively from textile dyeing wastewater. In this study, an aniline-degrading bacterial strain called AN-4a was isolated from textile dyeing sludge and identified as Pigmentiphaga daeguensis. Strain AN-4a eliminated 10 mg L−1 aniline within 15 h while shaking at 180 rpm at 30 °C. The optimal pH, temperature and NaCl concentration for aniline biodegradation by AN-4a was pH 7.0, 30 °C and 0.1% NaCl (w/v). Additional glucose and ammonium chloride inhibited the biodegradation of aniline by strain AN-4a. Aniline was initially converted to catechol and then metabolized to cis,cis-muconic acid (ccMA) by the catechol 1,2-dioxygenase (C12O) of strain AN-4a. To our knowledge, this is the first determination that Pigmentiphaga daeguensis can degrade aniline.
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