Microbial desalination cells with ion exchange resin packed to enhance desalination at low salt concentration
Microbial desalination cells with ion exchange resin packed to enhance desalination at low salt concentration
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DOI：
10.1016/j.memsci.2012.06.009
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发表时间：
2012-11
影响因子：
9.5
通讯作者：
Fang Zhang;Man Chen;Yan Zhang;R. Zeng
中科院分区：
文献类型：
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作者：
Fang Zhang;Man Chen;Yan Zhang;R. Zeng
高内阻是微生物海水淡化池(MDC)在低盐浓度下应用的主要障碍。为了提高MDC在低盐浓度(0.7g/L氯化钠)下的脱盐和发电量，在脱盐室中填充了离子交换树脂。海水淡化过程符合准一级动力学规律。在初始浓度为700 mg/L和100 mg/L时，与未加树脂的微孔板相比，其动力学常数分别增加2.5倍和3.9倍至0.363h−1，无限浓度降低6.6倍至7.13 mg/L和2.6倍至10.6 mg/L，电流密度和功率密度也随之增大。性能的改善是由于IER填料具有更好的传递能力和更低的内阻。较低的出水盐度也有利于后续的深度海水淡化工艺。
High internal resistance is one main obstacle for the application of microbial desalination cell (MDC) at low salt concentration. To enhance desalination and electricity production of MDC at low salt concentration (<0.7g/L NaCl), ion exchange resin (IER) was packed in a desalination chamber. The desalination profiles followed pseudo-first-order kinetics. For initial NaCl concentrations of 700 and 100mg/L, compared to MDC without resin, the kinetic constant increased 2.5 times to 0.152h−1and 3.9 times to 0.363h−1, respectively, while infinite concentration decreased 6.6 times to 7.13mg/L and 2.6 times to 10.6mg/L. On the other hand, the current and power density also increased with IER packing. The improved performance was due to the better transfer capacity and lower internal resistance with IER packing. The low effluent salinity would also benefit for the following deeper desalination process.