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The performance of aerobic granular sludge for simulated swine wastewater treatment and the removal mechanism of tetracycline.
机构信息
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.
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.
出版信息
J Hazard Mater. 2021 Apr 15;408:124762. doi: 10.1016/j.jhazmat.2020.124762. Epub 2020 Dec 15.
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-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.
在这项研究中，采用序批式反应器（SBR）中培养的好氧颗粒污泥（AGS）来研究其从猪废水中（SWW）去除四环素（TC）的能力。研究了 AGS 去除 TC 的机制。结果表明，AGS 工艺在运行过程中可以有效去除化学需氧量（COD）、氨氮（NH-N）、总磷（TP）和 TC。AGS 对 TC 的去除主要归因于吸附和生物降解，AGS 适应 TC 后生物降解的贡献率增加。在 TC 的生物降解过程中检测到 22 种副产物，并据此推测了 TC 的降解途径。与对照反应器相比，根据 LefSe 分析，在 TC 进料反应器中，不同分类水平的微生物多样性更为丰富。结果表明，参与微生物多环芳烃生物降解代谢途径的酶得到了富集，可能在 TC 的生物降解中发挥了关键作用。
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