从水热转化废水中生产短链脂肪酸 (HTCWW):重点是微生物群体分析
Yue Rao1, Zheng Chen2, Yun Bai3
1Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP(3)), Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Department of Energy, Environmental & Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA.
Bioresource technology
|September 3, 2025
概括
水热转化废水 (HTCWW) 可以通过无氧发酵转化为短链脂肪酸 (SCFA). 在最佳条件下,特别是pH值9.5,可最大限度地提高SCFA产量.
科学领域:
- 生物化学工程
- 环境科学
- 可再生能源
背景情况:
- 水热转化 (HTC) 从生物质中生产生物燃料和水炭.
- 水热转化废水 (HTCWW) 是增值产品的潜在原料.
- 无氧发酵是一种转化有机物质的生物过程.
研究的目的:
- 通过AF从HTCWW生产短链脂肪酸 (SCFA).
- 优化连续水箱反应器 (CSTR) 和无氧测序批量反应器 (ASBR) 的 AF 过程条件.
- 分析微生物群落并确定影响SCFA生产的关键因素.
主要方法:
- 在CSTR和ASBR系统中无氧发酵 (AF).
- 优化工艺参数,专注于pH值.
- 用于确定SCFA前体的质量平衡分析.
- 使用16S rRNA测序进行微生物群体分析.
主要成果:
- 在pH9.5下达到最高的SCFA产量:ASBR中SCOD为0.382g,CSTR中SCOD为0.363g.
- 质量平衡显示可溶性蛋白质和碳水化合物是主要的SCFA前体.
- 微生物群落结构受到pH的显著影响,在pH9. 5 (> 70%) 时Firmicutes占主导地位.
- 在pH值9.5时,Guggenheimella被确定为ASBR的一个关键属,有效地产生酸盐.
结论:
- 无氧发酵有效地将HTCWW转化为SCFA.
- 对于最大限度地提高SCFA产量和特定微生物活性,pH值为9.5.
- 了解微生物动力学,特别是古根海梅氏菌的作用,对于过程改进至关重要.
- 这项研究为将HTCWW转化为有价值的生物化学品提供了一条新途径.
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