Control of Membrane Fouling by Inorganic Salts in Vacuum Membrane Distillation

2018 ◽  
Vol 26 (5) ◽  
pp. 3-15
Author(s):  
Tae-Mun Hwang ◽  
Eun-Kyun Jang ◽  
Jae-Wuk Koo ◽  
Sook-Hyun Nam ◽  
Eun-Ju Kim
Keyword(s):  
Membrane Fouling ◽  
Membrane Distillation ◽  
Inorganic Salts ◽  
Vacuum Membrane Distillation

A review on membrane applications and transport mechanisms in vacuum membrane distillation

2017 ◽  
Vol 34 (1) ◽  
Author(s):  
Rakesh Baghel ◽  
Sushant Upadhyaya ◽  
Kailash Singh ◽  
Satyendra P. Chaurasia ◽  
Akhilendra B. Gupta ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Membrane Separation ◽  
Critical Evaluation ◽  
Experimental Studies ◽  
Membrane Distillation ◽  
Permeate Flux ◽  
Separation Processes ◽  
Vacuum Membrane Distillation ◽  
Polarization Coefficient ◽  
The Impact

AbstractThe main aim of this article is to provide a state-of-the-art review of the experimental studies on vacuum membrane distillation (VMD) process. An introduction to the history of VMD is carried out along with the other membrane distillation configurations. Recent developments in process, characterization of membrane, module design, transport phenomena, and effect of operating parameters on permeate flux are discussed for VMD in detail. Several heat and mass transfer correlations obtained by various researchers for different VMD modules have been discussed. The impact of membrane fouling with its control in VMD is discussed in detail. In this paper, temperature polarization coefficient and concentration polarization coefficient are elaborated in detail. Integration of VMD with other membrane separation processes/industrial processes have been explained to improve the performance of the system and make it more energy efficient. A critical evaluation of the VMD literature is incorporated throughout this review.

Taguchi Method in the Evaluation of Vacuum Membrane Distillation in Water Desalination

2013 ◽  
Vol 781-784 ◽  
pp. 2366-2369
Author(s):  
Salman Masoudi Soltani ◽  
Sara Kazemi Yazdi
Keyword(s):  
Taguchi Method ◽  
Flow Rate ◽  
Salt Concentration ◽  
Membrane Fouling ◽  
Water Flow Rate ◽  
Membrane Distillation ◽  
Water Desalination ◽  
Operational Parameters ◽  
Vacuum Membrane Distillation ◽  
Membrane Contact

Taguchi method has been applied to evaluate the effects of operational parameters on the efficiency of vacuum membrane distillation (VMD) in the desalination of water. It was observed that permeate increases with an increase in feed temperature and vacuum pressure. However, feed salt concentration adversely affected the amount of the collected permeate due to the reduction of vapour pressure as a result of the presence of the solute in water. Flow rate, however, could only increase the permeate if it was increased from 37.5 to 50 ml/s. Any further increase in flow rate to 100 ml/s, negatively lowered the permeate due to the limited feed/membrane contact time. We observed that at very high salt concentration (300 g/l) the permeate reduces accordingly, highlighting the fact that VMD should be used with care due to the presence of membrane fouling and/or other simultaneous flux-lowering effects present at concentrated feeds.

scholarly journals Investigation of Membrane Fouling in Vacuum Membrane Distillation (VMD) Using Blocking Filtration Laws

2022 ◽  
Vol 12 (1) ◽  
pp. 82
Author(s):  
Wajeeha Bibi ◽  
Muhammad Asif ◽  
Jawad Rabbi
Keyword(s):  
Membrane Fouling ◽  
Lower Energy ◽  
Constant Pressure ◽  
Membrane Distillation ◽  
Low Grade ◽  
Permeate Flux ◽  
Cake Layer ◽  
Vacuum Membrane Distillation ◽  
Critical Problems ◽  
Drinking Water Purification

VMD is one of the desalination technologies used for drinking water purification because of it higher permeate flux and lower energy consumption, and it uses low grade energy for operation. However, there are some critical problems related to VMD, one of which is membrane fouling. In the present study, the fouling phenomenon in VMD is investigated using constant pressure-blocking filtration laws. The results of constant pressure-blocking filtration law indicated that the permeate flux was initially unaffected by the cake layer, but with the passage of time as the pores began to constrict, a formation of a relatively thick cake layer was observed, which resulted in the decrease of permeate flux.

Study on Calcium and Magnesium Fouling of Vacuum Membrane Distillation

2012 ◽  
Vol 479-481 ◽  
pp. 240-244
Author(s):  
Bao An Li ◽  
Xue Jing Liu ◽  
Xiao Fei Gao
Keyword(s):  
Calcium Carbonate ◽  
Membrane Fouling ◽  
Calcium Sulfate ◽  
Membrane Distillation ◽  
Distillation Process ◽  
Soluble Salts ◽  
Main Form ◽  
Inlet Hole ◽  
Vacuum Membrane Distillation ◽  
Calcium And Magnesium

In this paper, calcium and magnesium fouling on membrane distillation process was investigated. The effect of less soluble salts with single component or multi component on flux and membrane fouling was examined, by means of synthesizing seawater. The results showed that the fouling caused by calcium carbonate and calcium sulfate was mainly formed by the attachment of the insoluble substance on the fibers. The calcium sulfate caused the blocking at inlet hole of the module. If there were less soluble salts with multi components in the feed, calcium carbonate was the main form of the fouling.

Study of membrane fouling in cross-flow vacuum membrane distillation

2014 ◽  
Vol 122 ◽  
pp. 133-143 ◽  
Author(s):  
Li Wang ◽  
Baoan Li ◽  
Xiaofei Gao ◽  
Qin Wang ◽  
Jun Lu ◽  
...  
Keyword(s):  
Membrane Fouling ◽  
Cross Flow ◽  
Membrane Distillation ◽  
Vacuum Membrane Distillation

scholarly journals A hybrid electric field assisted vacuum membrane distillation method to mitigate membrane fouling

RSC Advances ◽  
2018 ◽  
Vol 8 (32) ◽  
pp. 18084-18092
Author(s):  
Qinglin Huang ◽  
Huan Liu ◽  
Yafeng Wang ◽  
Changfa Xiao
Keyword(s):  
Electric Field ◽  
Membrane Fouling ◽  
Membrane Distillation ◽  
Catalytic Membrane ◽  
Distillation Method ◽  
Vacuum Membrane Distillation ◽  
Hybrid Electric

EVMD with a PTFE electro-catalytic membrane can effectively mitigate membrane fouling.

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