WUYan-fang,TANYing-shi,ZHENGXin-xu,et al.Aeration of Fluidized Birnessite Coupling Immersion Ceramic Ultrafiltration Membrane for Manganese Removal from Groundwater[J].China Water & Wastewater,2024,40(5):1-8.
曝气流化水钠锰矿耦合浸没式陶瓷超滤膜除锰
- Title:
- Aeration of Fluidized Birnessite Coupling Immersion Ceramic Ultrafiltration Membrane for Manganese Removal from Groundwater
- 摘要:
- 市政供水中锰离子超标不仅带来感官问题，也会危害身体健康。以太阳能光伏发电为能源构建曝气系统，进而形成流化水钠锰矿耦合浸没式陶瓷超滤膜一体化除锰净水设备。具体来说，就是在抗氧化陶瓷膜膜池中原位制备极具吸附能力和催化氧化效能的锰氧化物，结合膜滤初期高效截留富集的锰氧化菌，同时采用曝气流化的方式增强悬浮态水钠锰矿除锰能力。结果表明，太阳能光伏发电系统能够满足曝气环节的用电需求，每日最高产电量为48.29 W·h，可以供曝气泵产气241.45 L。该设备对地下水中的锰离子具有良好的去除效果，在进水锰离子<0.5 mg/L的前提下，出水锰离子浓度低至0.008 mg/L，去除率达到98%。运行结束时，膜通量稳定在20 L/（m2·h），依然保持稳定净水效果。微生物分析显示，膜池内存在着大量的锰氧化菌，是系统除锰能力的一项保障。XPS、XRD、拉曼和SEM-EDS分析表明，悬浮态水钠锰矿的形成和成熟有利于提高系统对锰离子的去除能力，是系统除锰的关键所在。
- Abstract:
- Excessive manganese in drinking water not only causes sensory problems, but also has negative effects on human health. In this study, solar power was used as the energy source to drive an aeration system, which could fluidify birnessite and then built an integrated equipment for manganese removal with immersion ceramic ultrafiltration membrane. Specifically, manganese oxides with excellent adsorption capacity and catalytic oxidation ability were prepared in situ in the filtration cell for anti-oxidation ceramic membrane. Both the manganese oxidizing bacteria concentrated by membranes in the initial stage of filtration and the aeration-enhanced birnessite in suspension could favor the removal of manganese. The energy provided by solar power system could meet the demand of the electricity for aeration, with a maximum output of 48.29 W·h/d, which enabled the aeration pump to produce 241.45 L gas. This integrated equipment could effectively remove manganese ions from groundwater. The concentration of manganese ions in effluent was less than 0.008 mg/L and 98% removal rate was achieved when the influent manganese ion concentration was less than 0.5 mg/L. At the end of the experiment, the water purification efficiency remained stable when the membrane flux was stabilized at 20 L/(m2·h). The microbial analysis results showed that there were a large number of manganese oxidizing bacteria in the system. The results of XPS, XRD, Raman and SEM-EDS analysis showed that the formation and the maturation of birnessite could improve the manganese removal.
相似文献/References:
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