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

doi:10.1016/j.biortech.2020.124358

Interaction and removal of oxytetracycline with aerobic granular sludge

Bioresour Technol. 2021 Jan;320(Pt A):124358. doi: 10.1016/j.biortech.2020.124358. Epub 2020 Nov 3.

Authors

Qiulai He¹, Zhiyi Xie², Zhidong Fu², Meng Wang³, Peng Xu², Jian Yu², Jingwei Ma², Shuxian Gao⁴, Li Chen⁵, Wei Zhang⁶, Jianyang Song⁷, Hongyu Wang⁸

Affiliations

¹ Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China. Electronic address: qiulaihe@hnu.edu.cn.
² Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Department of Water Engineering and Science, College of Civil Engineering, Hunan University, Changsha 410082, China.
³ Chongqing Branch of Central and Southern China Municipal Engineering Design & Research Institute Co., Ltd., Chongqing 400047, China; School of Civil Engineering, Wuhan University, Wuhan 430072, China.
⁴ CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei 230026, China.
⁵ State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
⁶ School of Hydraulic Engineering, Changsha University of Science and Technology, Changsha 410114, China.
⁷ School of Civil Engineering, Nanyang Institute of Technology, Nanyang 473004, China.
⁸ School of Civil Engineering, Wuhan University, Wuhan 430072, China. Electronic address: hyuwang@yeah.net.

PMID: 33171347
DOI: 10.1016/j.biortech.2020.124358

Abstract

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.

Keywords: Aerobic granular sludge; Bacterial community; Extracellular polymeric substances; Granulation grade; Oxytetracycline.

MeSH terms

Aerobiosis
Bioreactors
Oxytetracycline*
Sewage*
Waste Disposal, Fluid

Substances

Sewage
Oxytetracycline