相关实验视频
Updated: Jan 10, 2026

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
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溶液pH对膜蒸中氨回收的双重影响 - 对pH分区和质量转移系数的影响
Kai Yang1, Benjamin Michael Simplot1, Mohan Qin1
1Department of Civil and Environmental Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.
概括
调整废水的pH值是利用膜蒸 (MD) 有效回收氨的关键. 这项研究表明,pH控制显著提高了氨的回收,并为废水处理提供了具有成本效益的解决方案.
科学领域:
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
- 水处理技术水处理技术
背景情况:
- 通过膜蒸 (MD) 从废水中回收氨,可提供可持续的环境整治和节能.
- 由于氨的挥发性及其与离子的平衡,MD的性能受到溶液pH的显著影响.
研究的目的:
- 综合调查溶液pH对MD氨运输和回收效率的影响.
- 阐明pH影响氨回收的机制,特别是氨-氨平衡和质量转移系数.
- 通过pH调整提供优化MD性能的见解,通过pH调整回收氨.
主要方法:
- 在不同的pH条件下对氨回收的实验研究.
- 模拟方法用于模拟氨运输和回收效率.
- 在不同pH水平下分析氨流量和质量转移系数.
主要成果:
- 将MD料溶液的pH值从9提高到10,使氨流量增加了177%.
- 氨的质量转移系数从2.64 × 10-6 m·s-1增加到6.14 × 10-6 m·s-1随着pH值从9上升到10.
- 解决方案的pH值调整在提高氨回收效率方面比温度升高更有效.
结论:
- 溶液pH是通过MD优化氨回收的关键因素,影响平衡和质量转移.
- 调整pH值是一个比仅仅增加温度更可行的和有效的策略,以提高氨回收中的MD性能.
- 经过pH调整的优化MD操作可以带来显著的经济效益,估计2000头奶牛奶牛场的最大利为598,000美元.
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