Ke Zhang, J. Chen, Siqiao Yang
Oct 11, 2018
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IOP Conference Series: Earth and Environmental Science
Abstract
Diphenyl ortho-phthalate (DPP), as a prior pollutant for control, has been widely detected in environment. One bacterial strain was isolated from activated sludge using Diphenyl ortho-phthalate as the sole source of carbon and energy. According to the phylogeny of 16S rDNA sequence, the bacterial strain BET-7 was identified as Pseudomonas sp. Biodegradation of DPP by Pseudomonas sp. BET-7 was investigated. Results showed that the optimum pH and temperature for DPP degradation by BET-7 were 8.0 and 15 °C.The concentration of degradation ranged from 100 mg.L−1-400 mg.L−1. The strain exhibited higher degradation efficiencies and growth rates in alkalinity than in acidity. The optimum temperature was lower than 20 °C. The degradation rate decreased when temperature went up. The strain could degrade approximately 90% of 400 mg/L DPP after 60 h of cultivation. The results suggest that BET-7 may represent a promising application for DPP bioremediation.