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Yang Xiaohong, Tian Rui, Ma Shujuan, Lü Haili. Experimental study on membrane pollution of stacked air-gap membrane distillation module[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 963-968.
Citation: Yang Xiaohong, Tian Rui, Ma Shujuan, Lü Haili. Experimental study on membrane pollution of stacked air-gap membrane distillation module[J]. Chinese Journal of Environmental Engineering, 2013, 7(3): 963-968.
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Experimental study on membrane pollution of stacked air-gap membrane distillation module

  • 1.

    College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, China

  • 2.

    Renewable Energy Laboratory in Inner Mongolia, Hohhot 010051, China

  • Received Date: 29/12/2012
    Accepted Date: 24/07/2012
    Available Online: 18/03/2013
    Fund Project:
  • A stacked AGMD module with rotational flow structure was designed to investigate the membrane pollution situation, when the hot working medium was NaCl solution of 20 g/L and 70 ℃. The experimental results showed that membrane pollution appeared faster on membrane module under the high temperature condition in one experimental period of intermittent and continuous operation, after eight experimental periods, the flux dropped down to 42% of initial flux. The membrane surface was covered by a large number of yellow attachments. The SEM analysis showed that the yellow attachments were uneven accumulated granular pollutants and cuboid crystals. The EDS analysis showed that the pollutants had a minimum amount of Na and Cl element of NaCl crystallization, and also some O,C,Mg,Cu,Fe elements. The inorganic-scale precipitation on the fouling membrane can be wiped off with 5% hydrochloric acid solution, and the effect is good.
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Experimental study on membrane pollution of stacked air-gap membrane distillation module

  • Received Date: 29/12/2012
  • Accepted Date: 24/07/2012
  • Available Online: 18/03/2013
Fund Project:

Abstract: A stacked AGMD module with rotational flow structure was designed to investigate the membrane pollution situation, when the hot working medium was NaCl solution of 20 g/L and 70 ℃. The experimental results showed that membrane pollution appeared faster on membrane module under the high temperature condition in one experimental period of intermittent and continuous operation, after eight experimental periods, the flux dropped down to 42% of initial flux. The membrane surface was covered by a large number of yellow attachments. The SEM analysis showed that the yellow attachments were uneven accumulated granular pollutants and cuboid crystals. The EDS analysis showed that the pollutants had a minimum amount of Na and Cl element of NaCl crystallization, and also some O,C,Mg,Cu,Fe elements. The inorganic-scale precipitation on the fouling membrane can be wiped off with 5% hydrochloric acid solution, and the effect is good.

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