Interaction and removal of oxytetracycline with aerobic granular sludge.

Qiulai He, Zhiyi Xie, Zhidong Fu, Meng Wang, Peng Xu, Jian Yu, Jingwei Ma, Shuxian Gao, Li Chen, Wei Zhang, Jianyang Song, Hongyu Wang

Bioresource technology 2021 Jan

filter terms:

Aerobic granular sludge as a promising technology showed great resistance to adverse conditions. However, the interaction between oxytetracycline (OTC) and granular sludge was not studied sufficiently. This study therefore investigated OTC-tolerance ability of incomplete and complete granulation sludge from aspects of simultaneous nutrients removal, sludge characteristics, microbial activity, community changes, and vice versa OTC removal performance. Incomplete granulation sludge showed better denitrification performance and resistance. Whereas, denitrification and phosphorus removal of complete granulation sludge suffered a permanent collapse under 5 mg/L OTC. OTC could be removed by rapid adsorption and slow biodegradation via granular sludge. The EPS, especially TB-PS, played a significant role during the operational period subjected to OTC. The major genera of Lysobacter and Candidatus_Competibacter laid the biological basis for stability and functionality of granules, which acted as the putative contributors for resisting and removing OTC. This study showed that incomplete-granulated sludge qualified more promising application prospect. Copyright © 2020 Elsevier Ltd. All rights reserved.

Citation

Qiulai He, Zhiyi Xie, Zhidong Fu, Meng Wang, Peng Xu, Jian Yu, Jingwei Ma, Shuxian Gao, Li Chen, Wei Zhang, Jianyang Song, Hongyu Wang. Interaction and removal of oxytetracycline with aerobic granular sludge. Bioresource technology. 2021 Jan;320(Pt A):124358