揭示了运行模式对无氧消化系统与硫酸盐减少合的影响
Jin Du1, Xingzhao Zhou1, Qidong Yin2
1Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, Guangdong, China.
Bioresource technology
|July 2, 2023
概括
使用硫酸盐的无氧消化 (AD) 在快速填充模式中显示出快速动力学,但可以积累酸盐. 缓慢填充模式可以减轻这种情况,有利于不同的微生物群落 (r-和K-战略家).
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.
- 废水处理 废水处理
背景情况:
- 无氧消化 (AD) 是高强度废水处理的关键技术.
- 操作参数对富含硫酸盐的AD系统中的微生物群落的影响需要进一步调查.
研究的目的:
- 研究各种有机碳的快速和缓慢填充模式对含硫酸盐的AD中的微生物群落的影响.
- 了解不同操作策略下的微生物动力学和动力学.
主要方法:
- 四个无氧混反应堆 (ASBR) 在不同的快速和慢速填充条件下运行,使用不同的有机碳来源 (乙醇和乙酸盐).
- 通过有机碳降解率来评估运动性质.
- 用分类学和功能分析分析了微生物社区的结构和功能.
- 应用了r/K选择理论来解释微生物社区的转变.
主要成果:
- 快速填充模式显示,与缓慢填充模式相比,乙醇和乙酸盐的降解动力更快.
- 当乙醇是基质时,缓慢填充模式有效地减轻了酸盐积累.
- 分类学和功能分析显示,快速填充有利于r-战略家 (例如,Desulfomicrobium),而缓慢填充支持K-战略家 (例如,Geobacter).
结论:
- 运行模式在减少硫酸盐的AD系统中显著影响微生物群落结构和功能.
- 快速填充模式提高了降解率,而缓慢填充模式通过减少酸盐积累来提高工艺稳定性.
- r/K选择理论为了解AD过程中的微生物生态策略提供了一个有用的框架.
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