期刊
DESALINATION
卷 498, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.desal.2020.114726
关键词
Electrodialysis; Energy; Nitrate recovery; Nutrient; Water recovery
资金
- European Regional Development Fund (ERDF) via the Regional Council of South Savo
This study aims to optimize the recovery of nitrate from municipal wastewater by using electrodialysis processes. Under specific conditions, better nitrate recovery can be achieved, and the electrodialysis system has the potential to provide functional nutrient recovery and drinking water source alternatives.
The vast volume of nutrients discharging from municipal wastewater (MWW) into water resources, along with the stringent limitations of their discharge, can be addressed via the recovery of nutrients from this stream. Hence, the purpose of this study is to optimise and enhance nitrate recovery from MWW using single and two-stage electrodialysis processes. Furthermore, the chemical quality of the recycled water was comprehensively tested and compared with the standards. Better nitrate recovery was obtained at the flow rate of 60 Lh(-1), with four cell pairs, diluted-to-concentrated volume ratio (VD/VC) of 2/0.5 and using Na2SO4 as the electrolyte. Under these conditions, the nitrate concentration in the diluted part was near zero with a concentration ratio of 4.6 and energy consumption of 1.44 kWh kg NO3-. Two-stage batch electrodialysis enhanced nitrate concentration ratio to 19.2 with energy consumption of 4.34 kWh kg NO3-. The volumes of 2 L and 8 L of water could be recovered per 0.5 L of concentrated solution by applying single- and two-stage batch electrodialysis respectively. The pH, permeation sequence, membrane fouling and water transfer were also investigated. These results indicated that the electrodialysis system has the potential to provide functional nutrient recovery and drinking water source alternatives.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据