Study on the mechanical lifting process for membrane fouling control
Study on the mechanical lifting process for membrane fouling control
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DOI：
10.1080/01496395.2017.1365903
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发表时间：
2017-09
影响因子：
2.8
通讯作者：
Qianqian Chen;Zhiyu Liu;Xiaolong Lu;Zhong Ma
中科院分区：
文献类型：
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作者：
Qianqian Chen;Zhiyu Liu;Xiaolong Lu;Zhong Ma
摘要为了降低能耗，控制膜污染，开发了一种新型的浸没式膜分离工艺。在本设计中，用小功率电机取代了传统的曝气装置。通过电机产生的牵引力，膜组件可以在水中上下移动。在这种情况下，膜表面和水之间会产生摩擦，可以防止污染物沉积在膜表面，从而控制膜污染。-民过滤运行后，与曝气工艺相比，提升工艺的滤饼层阻力降低了13.6%左右。对于120min的过滤操作，提升过程的跨膜压力(TMP)在过滤结束时比曝气过程低11.1%。经长时间运行，稳定运行时间由曝气工艺的352min提高到提升工艺的408min。这说明新型提升工艺比曝气工艺能更有效地控制膜污染。因此，提升法是一种高效可行的膜分离技术。
ABSTRACT In order to reduce energy consumption and control membrane fouling, a novel submerged membrane separation process was developed in this paper. In this design, the traditional aeration device was replaced by a low-power motor. Through the traction force produced by the motor, the membrane module can move up and down in the water. In this case, friction will be created between the membrane surface and the water, which can prevent the deposition of pollutants on the membrane surfaces and then control membrane fouling. After a 64-min filtration operation, compared with the aeration process, the cake-layer resistance of the lifting process reduced by about 13.6%. For a 120-min filtration operation, the transmembrane pressure (TMP) of the lifting process was 11.1% lower than that of the aeration process at the end of filtration. According to the long-time operation, the stable running time was increased from 352 min of the aeration process to 408 min of the lifting process. All these suggest that the novel lifting process can control membrane fouling more effectively than the aeration process. Therefore, the lifting process is an efficient and feasible membrane separation technology.