磁性特性驱动提取的提升在磁铁增强活性泥:机械洞察力和过程验证
Jun Shi1, Luo-Kai Li1, Li-Han Lin1
1State Key Laboratory of Pollution Control and Resource Reuse, Key Laboratory of Urban Water Supply, Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, P.R. China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, P.R. China.
Environmental research
|January 26, 2026
概括
磁铁增强活性污泥 (MEAS) 通过促进脱和污泥沉积,改善了废水处理. 磁铁的高磁性属性是有效去除营养物质和满足排放法规的关键.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 废水处理厂 (WWTP) 面临着日益增长的需求和更严格的法规.
- 磁铁增强活性污泥 (MEAS) 是升级WWTP的一种新策略.
- 磁石对生物处理和微生物生态学的影响需要进一步研究.
研究的目的:
- 系统地评估不同磁铁颗粒对废水处理中的脱,污泥沉积和微生物反应的影响.
- 为了确定优化MEAS流程的关键磁铁属性.
- 提供关于磁铁在生物营养物质去除中的作用的机制性见解.
主要方法:
- 在低碳至条件下 (C/N = 4.4) 使用三种类型的磁铁颗粒进行了批量实验.
- 使用污泥体积指数 (SVI) 评估了污泥沉积情况.
- 微生物群体的结构和功能使用元基因组测序和电子传输系统活性 (ETSA) 测量进行了分析.
主要成果:
- 具有高和磁性化的磁铁具有显著增强的酸盐去除 (79.3%) 和减少SVI (从84.7到28.4毫升/克).
- MEAS促进了紧的形成,改变了细胞外聚合物质 (EPS) 蛋白质构造,并改善了微生物与粒子的相互作用.
- 甲基因组分析显示了脱细菌,磁性细菌和关键代谢基因的丰富.
- 对AAO反应堆的验证表明,NH4+-N (98.7%) 和总 (73.6%) 的高清除效率.
结论:
- 和磁化是为WWTP升级选择有效磁铁材料的关键参数.
- 通过改善微生物活动和结构,MEAS工艺增强了生物营养物质的去除和污泥沉积.
- MEAS提供了一个有前途的,改造友好的技术,用于升级现有的WWTP,以满足严格的环境标准.
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