生物脱硫过程中的多硫化物度和链长度:生物质度和硫化物加载率的影响
Kestral A K Y Johnston1,2, Mark van Lankveld1,3, Rieks de Rink1,3
1Environmental Technology, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands.
Environmental science & technology
|August 28, 2023
概括
生物脱硫通过将其转化为元素硫,有效地去除硫化 (H2S). 这项研究量化了多硫化物 (S2-) 和它们的链条长度,揭示了生物质度如何影响双生物反应器系统中H2S去除效率.
科学领域:
- 环境生物技术环境生物技术
- 生物化学工程是生物化学工程.
- 微生物过程是微生物的过程.
背景情况:
- 生物脱硫利用硫化氧化细菌 (SOB) 将硫化 (H2S) 转化为元素硫.
- 一个双生物反应器系统,包括一个无氧硫化生物反应器,用于增强的H2S去除.
- 多硫化物 (S2-) 是SOB对H2S氧化的中间体,通过化学平衡形成.
研究的目的:
- 量化聚硫化物 (S2-) 度,并确定它们在高H2S负载率下的链长分布.
- 阐明生物质度和硫化物在无氧条件下的生物去除之间的关系.
- 了解和控制SOB的硫化物吸收,以优化元素硫 (S8) 的形成.
主要方法:
- 聚硫化物 (S2-) 的量化和其链长分布的分析.
- 在不同H2S加载率和生物质度下对硫化物去除的研究.
- 在S2-,生物质和H2S去除效率之间的相关性分析.
主要成果:
- 在恒定生物质下观察到S2-度和H2S负载率之间的线性关系.
- 生物质度增加导致在类似的H2S负载率下测量S2水平降低.
- 在较高的生物质度下,发现了链长度为6的多硫化物 (S62-) 的显著减少.
结论:
- 生物质度是控制S2-水平和H2S去除效率的关键因素.
- 了解相对于生物质和加载速度的S2-动态对于优化生物脱硫是必不可少的.
- 这项研究有助于在双反应器系统中实现元素硫形成的高选择性.
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