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Xing, Yi; Chen, Xing-du; Wang, She-ping; Zhang, Zhi-qiang; Liu, Xin; Lu, Jin-suo
Journal of hazardous materials, 01/2021, Volume: 402Journal Article
Display omitted •The concentration change of minocycline in sewage pipeline was revealed.•Community structure of sewer biofilm was changed by minocycline.•The sewage chemical index was influenced by the change of microbial community. With the increasing use of drugs in cities, the sewer is becoming the most suitable place for antibiotic accumulation and transfer. In order to reveal the occurrence and fate of antibiotic sewage during pipeline migration, we used an anaerobic reactor device to simulate the concentration change of minocycline in the sewer and its impact on the sewage quality. The results showed that 90.8 % of minocycline was removed during sewer transportation. In the presence of minocycline, although the consumption of Chemical Oxygen Demand and total nitrogen in the sewage did not change significantly, the consumption rate of total phosphorus, nitrate nitrogen and the growth rate of ammonia nitrogen at the front end of the pipeline were decreased from 29.4 %, 86.3 %, 60.3 % to 3.7 %, 81.5 %, 18.3 % respectively. Minocycline inhibited the reduction of SO42−, while also reducing the production of H2S gas and increasing the release of CH4 gas. Moreover, the decline in the abundance of functional bacteria such as phosphorus accumulating organisms was consistent with the consumption of sewage nutrients. This experiment provides data support for the risk of wastewater leakage of medical and pharmaceutical wastewater into domestic sewage, and will helps to maintain the safe operation of actual sewage pipes.
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