载体表面的水友变化对污泥颗粒化的影响:从污泥特征,细胞外聚合物质和微生物社区来看
1Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, People's Republic of China.
Environmental pollution (Barking, Essex : 1987)
|July 1, 2024
概括
二氧化表面改性有氧颗粒污泥 (MnO2@SF-AGS) 通过增强颗粒和去除污染物,显著改善了废水处理. 这种新的方法加速了污泥的形成,并提高了和的去除效率.
科学领域:
- 环境生物技术 环境生物技术
- 废水处理工程 废水处理工程
- 在环境应用中的材料科学.
背景情况:
- 有氧颗粒污泥 (AGS) 是有效的同时处理污染物.
- 提高AGS颗粒和污染物去除效率仍然是一个挑战.
- 载体的表面修改可以提高AGS性能.
研究的目的:
- 开发和评估Fe2O3和MnO2表面修饰的草基AGS (Fe2O3@SF-AGS和MnO2@SF-AGS).
- 调查表面修改对微生物附着,颗粒和污染物去除的影响.
- 阐明增强AGS性能背后的机制.
主要方法:
- 合成Fe2O3@SF-AGS和MnO2@SF-AGS,平均颗粒大小为3毫米.
- 对颗粒性能,聚合物物质含量和污染物去除率 (NH4+-N,TN,TP) 的评估.
- 细菌群体结构的分析和与颗粒和去除效率的相关性.
主要成果:
- 表面修改降低了载体的疏水性,促进了微生物的附着和繁殖.
- MnO2@SF-AGS表现出较高的颗粒度,比对照者早一周稳定.
- MnO2@SF-AGS显示出1.28倍高的聚合物物质含量和NH4+-N (27.28%),TN (12.8%) 和TP (32.14%) 的提升去除率.
- 观察到明显的细菌群体变异,特定的属性对MnO2@SF-AGS性能至关重要.
- 从MnO2金属离子的电荷转移促进了颗粒和污染物去除.
结论:
- MnO2表面修饰是一种有前途的策略,可以提高有氧颗粒污泥的性能.
- MnO2@SF-AGS显著提高了废水处理中的和去除效率.
- 该研究强调了细菌群落和金属离子电荷转移在优化AGS功能中的作用.
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