Tetracycline bioremediation using the novel Serratia marcescens strain WW1 isolated from a wastewater treatment plant

四环素 生物修复 微生物学 拉伤 废水 粘质沙雷氏菌 生物 细菌 食品科学 抗生素 环境工程 生物化学 遗传学 大肠杆菌 解剖 基因 工程类
作者
Pankaj Bhatt,Chang-Hyun Jeon,Woong Kim
出处
期刊:Chemosphere [Elsevier]
卷期号:298: 134344-134344 被引量:29
标识
DOI:10.1016/j.chemosphere.2022.134344
摘要

Tetracycline pollution is an emerging threat in aquatic and terrestrial environments because of its widespread applications in human disease, livestock, and aquaculture. Present study, investigated the tetracycline degrading novel Serratia marcescens strain WW1, which was isolated from a wastewater treatment plant (WWTP). Toxicity analysis of tetracycline with strain WW1 indicates that its intermediate metabolites are not toxic for the indicator bacteria and algae. The degradation conditions for the tetracycline optimized using response surface methodology (RSM) were determined as: pH 6.0; temperature, 36 °C; tetracycline concentration, 20 mg L-1; and inoculum size, 100 μL (OD∼0.5). The strain WW1 was able to utilize tetracycline during the growth phase, and it degraded 89.5% of the tetracycline within 48 h. The degradation kinetics suggested the strain perform significant tetracycline removal with half-life (t1/2) 239.04 and 12.44 h in control and treatments. Tetracycline and its intermediates were analyzed using High Performance Liquid Chromatography (HPLC) and Liquid Chromatography-Mass Spectroscopy (LC-MS). It was observed that strain WW1 could efficiently metabolize the tetracycline within 48 h of experiment. The ability of strain WW1 to degrade tetracycline justifies its use as an environmentally-useful bacterium. Therefore, the present study demonstrated that the degradation of antibiotics is possible using indigenous microbial strains.
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