电驱动膜技术在水处理中的应用

发布时间：2018-05-26 00:09

本文选题：电驱动膜 + 高含盐废水　；参考：《青岛大学》2017年硕士论文

【摘要】：电驱动膜技术是开发较早并在工业上应用较为广泛的膜分离技术之一。本论文提出了采用电驱动膜技术处理高含盐废水和重金属废水,目的是解决高含盐废水及重金属废水等难处理污水的处置,电驱动膜法根据自身的工作原理,适合处理这两种废水,这种方法的优点是处理后可以达标排放,缺点是浓水需要进一步处理。本文以模拟溴化钠代表高含盐废水,以模拟铜离子代表重金属废水,采用电驱动膜处理的方法进行研究,研究以膜对电压、电流密度、浓度变化、能耗为主要操作参数,研究不同的参数对处理效果的影响,处理结果以是否可以达到达标排放为主。电驱动膜研究高盐废水的结果表明,当溴化钠的浓度约为15000mg/L,经过设备处理后浓度可最低降至115 mg/L,这时水中的盐度远低于排放标准,这种工艺可以被用来去除溴化钠。电驱动膜研究重金属废水的结果表明,铜离子的浓度停留在约150mg/L时,能耗和处理效果达到最优的结果,如铜离子浓度的增大,能耗明显上升,但此方法处理含铜废水的成本较大。实验同时测定了电驱动膜在处理反渗透浓水方面的应用,得出的结论为该方法能量消耗低,每吨水运行电耗仅为2 kWh,且回收率高,系统回收率为75%,该处理过程无需换热装置,电膜产水可直接进RO,按山东地区年平均水温15°C加热至25°C计算,每吨水加热需蒸汽费用约3元,因此该方法减少蒸汽消耗,节省费用。电驱动膜技术作为一种高科技手段,以其节能高效、无三废产生、节约占地等优点必将越来越广泛地应用于精细化学工业,食品和医疗领域的特种分离,为产品的分离提纯发挥越来越大的作用。
[Abstract]:Electrodrive membrane technology is one of the membrane separation technologies developed earlier and widely used in industry. In this paper, the treatment of high salt wastewater and heavy metal wastewater by electrodrive membrane technology is put forward. The purpose of this paper is to solve the problem of high salt wastewater and heavy metal wastewater treatment. The electrodrive membrane method is based on its working principle. This method is suitable for the treatment of these two kinds of wastewater. The advantage of this method is that it can be discharged up to standard after treatment, but the disadvantage is that the concentrated water needs further treatment. In this paper, simulated sodium bromide is used to represent high salt wastewater and copper ion is used to represent heavy metal wastewater. The main operating parameters, such as membrane voltage, current density, concentration change and energy consumption, are studied in this paper. The effect of different parameters on the treatment effect was studied. The results of electrodrive membrane study show that when the concentration of sodium bromide is about 15 000 mg / L, the concentration of sodium bromide can be reduced to 115 mg / L after treatment, and the salinity of the water is far below the discharge standard. This process can be used to remove sodium bromide. The results of electrodrive membrane study on heavy metal wastewater show that when the concentration of copper ion stays at about 150mg/L, the energy consumption and treatment efficiency reach the optimum results, such as the increase of copper ion concentration, the increase of energy consumption, However, the cost of treating copper-containing wastewater by this method is high. At the same time, the application of electric drive membrane in the treatment of reverse osmosis concentrated water was determined. The conclusion is that the energy consumption of this method is low, the electricity consumption per ton of water is only 2 kWhs, and the recovery rate is high, and the system recovery rate is 75%. The electric membrane can produce water directly into RO.The annual average water temperature of Shandong Province is 15 掳C to 25 掳C. the steam cost per ton of water heating is about 3 yuan, so the steam consumption is reduced and the cost is saved by this method. As a kind of high-tech means, electrodrive membrane technology will be more and more widely used in the separation of fine chemical industry, food and medical field, because of its advantages of energy saving and high efficiency, no waste generation, saving of land, etc. For the separation and purification of products play a more and more important role.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703

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