无氧消化对超声波生物污泥脱水能力的影响
Sergio Luna Nino1, Torsten Meyer1, Elizabeth A Edwards1
1Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College St, Toronto, Ontario, M5S 3E5, Canada.
Journal of environmental management
|May 31, 2025
概括
无氧消化通过去除小颗粒来改善生物泥的脱水能力. 这一过程提高了废水处理中的排水效率,降低了成本和环境影响.
科学领域:
- 环境科学 环境科学
- 生物技术是生物技术.
背景情况:
- 关于无氧消化对生物污泥脱水能力的影响存在相互矛盾的研究.
- 改善脱水能力的基本机制尚未得到充分理解.
- 生物污泥排水对废水处理成本和环境足迹产生重大影响.
研究的目的:
- 阐明无氧消化改善生物污泥脱水能力的机制.
- 研究细胞外聚合物物质 (EPS) 和超状颗粒的作用.
- 为了优化无氧消化,提高生物污泥脱水.
主要方法:
- 生物泥被超声波处理以减少最初的脱水能力.
- 超声波生物泥在美索菲尔条件下经历了无氧消化.
- 使用毛细管吸收时间和皇冠压力过液总固体来评估脱水能力.
- 分析了细胞外聚合物物质 (EPS) 和颗粒大小分布的变化.
主要成果:
- 无氧消化改善了脱水能力,使毛细血管吸水时间从84.7 ± 11.3 减少到31.6 ± 3.2 s-L/g.
- 在6天内观察到超状颗粒 (<10微米) 的显著去除.
- 颗粒大小的减少与改善的脱水能力和减少过物固体相关.
- 细胞外聚合物 (EPS) 的变化很小,这表明它们不是主要的因素.
结论:
- 小超状颗粒的净去除是改善无氧消化过程中生物污泥脱水能力的关键机制.
- 了解这些机制可以导致更高效的废水处理过程.
- 进一步的研究可以优化无氧消化用于污泥管理和资源回收.
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