膜电解蒸用于从pH中性发酵废水中提取挥发性脂肪酸
Sidan Lu1, Allyson McGaughey1, Sungju Im2
1Department of Civil and Environmental Engineering and Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ 08544, United States.
Water research
|August 25, 2024
概括
这项研究引入了一种新的膜电解蒸 (MED) 工艺,以有效地从废水中提取挥发性脂肪酸 (VFA). 新方法显著提高了VFA回收率,促进了废物流中的资源利用.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
- 分离技术 分离技术
背景情况:
- 挥发性脂肪酸 (VFA) 是有价值的化学前体,但由于它们的电离状态,很难从中性废水中提取.
- 传统的蒸发方法对于在中性pH下从发酵溶液中回收VFAs是低效的.
研究的目的:
- 开发和介绍一种新的膜电解蒸 (MED) 工艺,以从pH中性废水中有效地提取VFA.
- 为了证明综合pH调节和焦尔加热在增强VFA蒸发方面的有效性.
- 模拟过程并评估温度对膜表面pH的影响.
主要方法:
- 设计了一种新的膜电解蒸 (MED) 系统,集成pH调节和焦尔加热.
- 为了有效的气液相隔离,采用了疏水膜.
- 开发了一个物理化学模型来分析温度对膜表面pH的影响.
主要成果:
- 该MED工艺实现了12.03g/m2/h的高酸流率在6V,完全由电力供电.
- 在没有焦尔加热或pH波动的对照实验中,流速显著降低 (0.23g/m2/h和0.32g/m2/h).
- 开发的模型提供了对温度依赖的膜表面pH值的见解.
结论:
- 该MED过程提供了一种高效和电力驱动的方法,用于从具有挑战性的废水流中回收VFAs.
- 这项技术提高了资源回收,并为循环碳经济的原则做出了贡献.
- 整合pH控制和焦尔加热对于MED系统的高性能至关重要.
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