顺序去除化物和回收甲的综合战略:通过化物还原驱动的泥发酵
Xiaodi Li1, Mengxue Sun1, Bo Wang1
1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Water research X
|January 27, 2025
概括
减少污泥中的化物通过刺激污泥发酵和水解来增强甲的产生. 低化物水平 (100 mg/L) 显著提高了甲产量,而高水平则由于毒性和资源竞争而抑制了甲产量.
科学领域:
- 环境微生物学环境微生物学
- 生物技术是生物技术.
- 无氧消化消化无氧消化
背景情况:
- 用自由酸处理泥可以恢复短链脂肪酸.
- 没有酸性pH调整的连续化物减少和甲回收是未研究的.
研究的目的:
- 研究不同酸盐含量对酸盐减少和甲生产的影响.
- 确定化物减少的可行性,以从污泥中提升甲回收.
主要方法:
- 污泥的无氧消化,初始度不同的酸盐 (100-800毫克/升).
- 监测化物减少率和甲生产量.
- 16S rRNA基因测序以分析微生物社区的变化.
- 基于模型的分析,以评估甲产量和生产率.
主要成果:
- 根据初始度,在14天内发生了完全的亚酸盐减少.
- 化物减少刺激了污泥发酵和水解,增加了有机物质的可用性.
- 与对照组相比,在100mg/L化物下,甲产量增加了83.2%.
- 高度的亚酸盐 (200-800毫克/升) 抑制了甲的产生,原因是毒性和对碳来源的竞争.
- 16S rRNA分析显示,水解细菌的丰富性增加了.
结论:
- 化物减少是一种可行的策略,可以在非酸性条件下从污泥中增强甲生产.
- 优化酸盐度至关重要,以最大限度地提高甲产量,避免抑制.
- 这种方法为污泥处理和生物气生产提供了一种环境和经济上有吸引力的方法.
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