化学
生物降解
微生物种群生物学
蛋白质细菌
环境化学
稻草
化学需氧量
放线菌门
胞外聚合物
废水
挥发性悬浮物
厚壁菌
人口
细菌
制浆造纸工业
环境工程
生物
有机化学
环境科学
16S核糖体RNA
生物化学
无机化学
人口学
社会学
工程类
基因
生物膜
遗传学
作者
Yu Jin,Wei Xiong,Dan Liŭ,Zhiqing Wu,Gang Xiao,Shaojie Wang,Haijia Su
出处
期刊:Chemosphere
[Elsevier]
日期:2023-08-01
卷期号:331: 138828-138828
被引量:5
标识
DOI:10.1016/j.chemosphere.2023.138828
摘要
Atrazine (ATZ) has caused serious environmental pollution, but the biodegradation of ATZ is relatively slow and inefficient. Herein, a straw foam-based aerobic granular sludge (SF-AGS) was developed, the spatially ordered architectures of which could greatly improve the drug tolerance and biodegradation efficiency of ATZ. The results showed that, in the presence of ATZ, chemical oxygen demand (COD), ammonium nitrogen (NH4+-N), total phosphorus (TP), and total nitrogen (TN) were effectively removed within 6 h, and the removal efficiencies were as high as 93.37%, 85.33%, 84.7%, and 70%, respectively. Furthermore, ATZ stimulated microbial consortia to secrete three times more extracellular polymers compared to without ATZ. Illumina MiSeq sequencing results showed that bacterial diversity and richness decreased, leading to significant changes in microbial population structure and composition. ATZ-resistant bacteria including Proteobacteria, Actinobacteria, and Burkholderia laid the biological basis for the stability of aerobic particles, efficient removal of pollutants, and degradation of ATZ. The study demonstrated that SF-AGS is feasible for ATZ-laden low-strength wastewater treatment.
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