污泥特性和生物代谢特征对高速接触稳定工艺性能的影响
Zhongqi Jiang1, Mengxuan Deng1, Shan Qiu1
1State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China.
Journal of environmental management
|September 19, 2024
概括
优化废水处理包括平衡有机物去除和污泥沉积. 这项研究发现,污泥保留时间 (SRT) 影响微生物群落和细胞外聚合物物质 (EPS),影响高速接触稳定 (HiCS) 系统的性能和能源使用.
科学领域:
- 环境工程 环境工程
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 高速接触稳定 (HiCS) 工艺在废水处理中有效地去除溶解有机物 (DOM),但污泥沉积不良.
- 了解过程参数,DOM,废水质量和微生物代谢之间的相互作用对于优化HiCS性能至关重要.
- 污泥的特性显著影响废水处理系统中的沉积和有机物 (OM) 捕获效率.
研究的目的:
- 调查污泥特性对污泥沉积和有机物质捕获效率在HiCS过程中的影响.
- 识别和审查DOM和细胞外聚合物质 (EPS) 中的可溶性光成分.
- 建立操作参数,微生物代谢和整体HiCS过程性能之间的相关性.
主要方法:
- 在不同的污泥保留时间 (SRT) 下,探索污泥特性,包括形态,生物活性和EPS分泌.
- 在DOM和EPS中使用光谱法分析可溶性光元件.
- 高通量测序以表征微生物社区结构和多样性.
主要成果:
- 在HiCS中的盛宴/饥荒 (F/F) 制度控制了污泥的激活,影响了污泥的特性和EPS分泌.
- 减少的SRT导致更松散的,增加的微生物活动,以及更高的EPS产量 (特别是LB-PN),对沉产生了负面影响.
- 建议采用光指示器 ((C1+C2) / C3比率),将操作参数,污泥状态和OM捕获效率联系起来,在4天的SRT和特定比率范围 (1.04-1.36) 中观察到最佳性能.
结论:
- 泥沉积和生物活动是OM在HiCS中回收的关键因素,在4天的SRT中实现了最佳捕获.
- 微生物群落结构随着SRT转变,影响了关键细菌群和EPS生产.
- 拟议的光指示器为优化HiCS操作提供了一个有价值的工具,以实现高效的OM捕获和减少能源消耗.
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