The performance of aerobic granular sludge for simulated swine wastewater treatment and the removal mechanism of tetracycline

Xiaochun Wang; Ji Li; Xiaolei Zhang; Zhonglin Chen; Jimin Shen; Jing Kang

doi:10.1016/j.jhazmat.2020.124762

The performance of aerobic granular sludge for simulated swine wastewater treatment and the removal mechanism of tetracycline

J Hazard Mater. 2021 Apr 15:408:124762. doi: 10.1016/j.jhazmat.2020.124762. Epub 2020 Dec 15.

Authors

Xiaochun Wang¹, Ji Li², Xiaolei Zhang³, Zhonglin Chen⁴, Jimin Shen⁴, Jing Kang⁴

Affiliations

¹ Department of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
² Department of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.
³ Department of Civil and Environmental Engineering, Shenzhen Key Laboratory of Water Resource Application and Environmental Pollution Control, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China. Electronic address: xiaolei.zhang2016@foxmail.com.
⁴ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.

PMID: 33373952
DOI: 10.1016/j.jhazmat.2020.124762

Abstract

In this study, aerobic granular sludge (AGS) cultivated in a sequencing batch reactor (SBR) was employed to investigate its ability on the decontamination of tetracycline (TC) from swine wastewater (SWW). The removal mechanism of TC by AGS was studied. Results showed that the AGS process could effectively remove chemical oxygen demand (COD), ammonium nitrogen (NH_{+ 4}-N), total phosphorus (TP), and TC during operation. The removal of TC by AGS was mainly due to adsorption and biodegradation, and the contribution rate of biodegradation increased after AGS adaptation to TC. Twenty-two by-products were detected during biodegradation of TC, and accordingly the degradation pathway of TC was speculated. Compared to the control reactor, the microbe diversity in different levels of classification was richer in the TC fed reactor according to the LefSe analysis. The results revealed that enzymes that participated in the metabolic pathway of microbial biodegradation of polycyclic aromatic compounds were enriched and may have played a key role in the biodegradation of TC.

Keywords: Functional bacteria; Granular adsorption; Metabolic pathway; Pollutant removal efficiency; Tetracycline.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Aerobiosis
Animals
Biological Oxygen Demand Analysis
Bioreactors
Nitrogen
Sewage*
Swine
Waste Disposal, Fluid
Wastewater
Water Purification*

Substances

Sewage
Waste Water
Nitrogen