通过连续反应堆运行评估最佳的污水污泥预处理技术:过程性能和微生物社区洞察力
Georgia-Christina Mitraka1, Konstantinos N Kontogiannopoulos2, Anastasios I Zouboulis3
1Laboratory of Chemical & Environmental Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki GR-54124, Greece; Soil and Water Resources Institute, Hellenic Agricultural Organisation Dimitra, Thermi, P.O. Box 60458, Thessaloniki GR-57001, Greece.
Water research
|April 28, 2024
概括
低温热预处理提高了无氧消化性能,提高了污泥中的甲产量. 特殊的预处理条件改善了水解和甲基生成,即使在高有机载荷率下也是如此.
科学领域:
- 环境生物技术环境生物技术
- 无氧消化消化无氧消化
- 污水处理 污水处理 污水处理
背景情况:
- 连续无氧反应堆对于废物管理至关重要.
- 污泥预处理可以提高无氧消化的效率.
- 了解热预处理对污泥特性的影响至关重要.
研究的目的:
- 研究两个低温热预处理对连续无氧反应器的影响.
- 评估预处理对污泥特性和在不同的有机载荷率 (OLR) 下反应器性能的影响.
- 分析微生物群落结构,并确定导致污泥泡的因素.
主要方法:
- 连续无氧反应器用不同总固体含量 (∼3%和∼6%) 的污泥供应.
- 污泥经过两次低温热预处理 (48小时的温度为45°C,另外48小时的温度为55°C).
- 有机载荷率 (OLR) 逐步从1.0增加到2.5g挥发性固体/L·day.
- 测量了甲产量,并使用16S rRNA基因测序分析了微生物群落.
主要成果:
- 预处理增强了有机物水解,污泥溶解和甲基生成.
- 最高的甲产量 (240±3.0毫升/g挥发性固体) 是通过在45°C和55°C预处理的污泥以2.5g挥发性固体/L·day的OLR实现的.
- 16S rRNA基因测序揭示了与污泥加厚,预处理和有机物释放相关的独特微生物社区结构.
- 在废水泡层中确定了与泡相关的特定属,这些属与操作泡事件有关.
结论:
- 低温热预处理显著提高了连续无氧消化的效率.
- 优化的预处理条件和OLR最大限度地提高了甲的产量.
- 微生物社区分析提供了对消化性能和发泡现象的见解.
- 对泡减缓策略的进一步研究是有必要的.
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