相关实验视频
Updated: Jan 17, 2026

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
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通过电透析从废水中缩氨
Hyuck Joo Choi1, Mohammed Tahmid1, Spandan Mondal1
1School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 311 Ferst Drive NW, Atlanta, Georgia 30332, United States.
概括
电透析 (ED) 可以从废水中回收氨,但面临着挑战. 消除硬度显著降低了能源消耗,并改善了氨度,使ED更适合营养恢复.
科学领域:
- 环境工程 环境工程
- 水处理技术水处理技术
- 化学分离过程 化学分离过程
背景情况:
- 从废水中回收氨对于营养回收和污染控制至关重要.
- 电透析 (ED) 显示了氨回收的潜力,但由于膜缩放,低选择性和复杂混合物的高能耗而受到阻碍.
研究的目的:
- 评估电透析 (ED) 对模拟和真实废水中氨回收的有效性.
- 调查硬度去除和分阶段ED对能源消耗和度因子的影响.
主要方法:
- 电透析应用于模拟和真实废水样本.
- 对一些样品进行了硬度去除预处理.
- 为了提高度,研究了分阶段电透析.
- 测量了氨度,阴离子度 (Na+,K+) 和特定能耗 (SEC).
主要成果:
- 在去除硬度后,特定能耗 (SEC) 从超过31kWh/kg-N降至7kWh/kg-N.
- 氨的度系数 (CF) 在预处理后达到7.5-10 ,与单盐溶液相比.
- 阴离子交换膜对和离子对氨的选择性较低 (选择性接近1).
- 阶段性ED实现了~50的CF,SECs为15.2-18.1kWh/kg-N,产生了含有显著Na+和K+含量的缩产品.
结论:
- 预处理,特别是去除硬度,显著提高了废水中氨回收的ED效率.
- 缩流中的其他酸盐 (Na+,K+) 的存在影响其作为肥料的直接使用.
- 阶段性ED提供了一种有前途的方法,用于高度氨的回收,从而降低了能源需求.
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