Ethanol-Water Separation by Membrane Distillation: Effect of Temperature Polarization

Franken, A.C.M.; Nolten, J.A.M.; Mulder, M.H.V.; Smolders, C.A.

doi:10.1515/9783110867374-052

Cited by 7 publications

(2 citation statements)

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“…The researchers have suggested membrane wetting and membrane fouling would be the factors that cause reducing in permeate flux. There is a 30% flux decline in one month observed by Franken and co-workers where during the progress, it is found that many pores became wetted, which causes a backflow of permeate to the feed side [45]. This issue was further validated by adjusting the hydrostatic pressure on the permeate side, where the flux decreases as the hydrostatic pressure increases.…”

Section: Effect Of Long-term Operationmentioning

confidence: 94%

“…On the other hand, the influence of flux decrement due to membrane fouling can be caused by bacteria growth on the membrane surface and scaling of the membrane. McGaughey, Gustafson and Childress discovered a small degree of fouling phenomenon is likely to occur over a long period even using tap water as the feed for membrane distillation [45,46]. This was due to the trace amount of organic matter in the NaCl feed solution, although no foulants were added.…”

Section: Effect Of Long-term Operationmentioning

confidence: 99%

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Effect of Configurations and Operating Parameters on the Desalination Performance of Membrane Distillation: A Review

Chong

Kuek

Lai

et al. 2022

AMST

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A desalination is a promising approach to addressing the freshwater scarcity caused by limited freshwater resources and salt intrusion (pollution). Membrane distillation (MD) was proposed as a possible technology for desalination. This study review the efficiency of membrane distillation by comparing the permeate flux and thermal energy efficiency of the four configurations, namely, direct contact membrane distillation (DCMD), vacuum membrane distillation (VMD), air gap membrane distillation (AGMD) and sweeping gas membrane distillation (SGMD). It was observed that the sequence of permeate flux and thermal energy efficiency is VMD> DCMD> SGMD>AGMD and VMD> SGMD> AGMD> DCMD, respectively. The results show that the VMD provides the highest permeate flux at 15.2 kg/hm2 with 99.25% of salt rejection rate. Additionally, VMD possess good energy efficiency at 66% relative to other configuration at the recorded permeate flux. Subsequently, the feasibility of MD in desalination is studied using different case studies. Furthermore, the effect of operating parameters (feed temperature, feed concentration, feed flow rate, and long-term operation) on flux is discussed. The results suggested that the flux increases when feed temperature or feed flow is increased. At the same time, the flux will decrease when feed is in high concentration and long-term operation.

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Section: Effect Of Long-term Operationmentioning

confidence: 94%

Section: Effect Of Long-term Operationmentioning

confidence: 99%