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Study on removal of phosphorus as struvite from synthetic wastewater using a pilot-scale electrodialysis system with magnesium anode.
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-03-26 , DOI: 10.1016/j.scitotenv.2020.138221 Yuyan Cai 1 , Zhiying Han 1 , Xiaochang Lin 1 , Yalin Duan 1 , Jianghui Du 1 , Zhangying Ye 1 , Jun Zhu 2
Science of the Total Environment ( IF 8.2 ) Pub Date : 2020-03-26 , DOI: 10.1016/j.scitotenv.2020.138221 Yuyan Cai 1 , Zhiying Han 1 , Xiaochang Lin 1 , Yalin Duan 1 , Jianghui Du 1 , Zhangying Ye 1 , Jun Zhu 2
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Struvite precipitation may become ineffective in removing phosphorus due to the low concentration of phosphate in the liquid. In this study, electrolysis with a magnesium anode was applied to recovering phosphorus and ammonia as struvite from wastewater. A novel electrodialysis process (ED) with a magnesium anode was developed, and its feasibility to treat synthetic wastewater with low phosphate concentration was demonstrated in a pilot-scale experimental system. To achieve high phosphate removal efficiency in the product stream, the optimal initial pH and flow rate were found to be 8.8 and 200 L h-1, respectively, for the ED system at a constant current of 0.1 A. The pilot-scale ED system under the consecutive batch mode removed 65% phosphate from the synthetic wastewater containning 10 mg L-1P, and the phosphate concentration in the product stream was kept at 30 mg L-1 after 280 min. The running cost of the ED system was estimated to be $31.27 kg-1 P for synthetic wastewater with 10 mg L-1 P, mainly resulting from the cost of the loss of the magnesium anode. The precipitates generated from the product stream were confirmed as struvite by XRD analysis.
中文翻译：
使用镁阳极的中试电渗析系统研究去除合成废水中鸟粪石中的磷。
由于液体中磷酸盐的浓度低，鸟粪石沉淀可能无法有效去除磷。在这项研究中，采用镁阳极电解法从废水中回收了鸟粪石中的磷和氨。开发了一种具有镁阳极的新型电渗析工艺（ED），并在中试规模的实验系统中证明了其处理低磷酸盐浓度的合成废水的可行性。为了在产物流中实现较高的磷酸盐去除效率，在0.1 A的恒定电流下，ED系统的最佳初始pH和流速分别为8.8和200 L h-1。在连续分批模式下，从含10 mg L-1P的合成废水中去除了65％的磷酸盐，280分钟后产物流中的磷酸盐浓度保持在30mg L-1。对于含10 mg L-1 P的合成废水，ED系统的运行成本估计为31.27 kg-1 P，主要是由于损失了镁阳极而产生的。由产物流产生的沉淀物通过XRD分析确认为鸟粪石。
更新日期：2020-03-27
中文翻译：
使用镁阳极的中试电渗析系统研究去除合成废水中鸟粪石中的磷。
由于液体中磷酸盐的浓度低，鸟粪石沉淀可能无法有效去除磷。在这项研究中，采用镁阳极电解法从废水中回收了鸟粪石中的磷和氨。开发了一种具有镁阳极的新型电渗析工艺（ED），并在中试规模的实验系统中证明了其处理低磷酸盐浓度的合成废水的可行性。为了在产物流中实现较高的磷酸盐去除效率，在0.1 A的恒定电流下，ED系统的最佳初始pH和流速分别为8.8和200 L h-1。在连续分批模式下，从含10 mg L-1P的合成废水中去除了65％的磷酸盐，280分钟后产物流中的磷酸盐浓度保持在30mg L-1。对于含10 mg L-1 P的合成废水，ED系统的运行成本估计为31.27 kg-1 P，主要是由于损失了镁阳极而产生的。由产物流产生的沉淀物通过XRD分析确认为鸟粪石。
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