Production of process water using integrated membrane processes |
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Authors: | K Karakulski M Gryta M Sasim |
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Institution: | (1) Institute of Chemical and Environment Engineering, Szczecin University of Technology, Pułaskiego 10, 70-322 Szczecin, Poland |
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Abstract: | Application of ultrafiltration, nanofiltration, reverse osmosis, membrane distillation, and integrated membrane processes
for the preparation of process water from natural water or industrial effluents was investigated. A two-stage reverse osmosis
plant enabled almost complete removal of solutes from the feed water. High-purity water was prepared using the membrane distillation.
However, during this process a rapid membrane fouling and permeate flux decline was observed when the tap water was used as
a feed. The precipitation of deposit in the modules was limited by the separation of sparingly soluble salts from the feed
water in the nanofiltration. The combined reverse osmosis—membrane distillation process prevented the formation of salt deposits
on the membranes employed for the membrane distillation. Ultrafiltration was found to be very effective removing trace amounts
of oil from the feed water. Then the ultrafiltration permeate was used for feeding of the remaining membrane modules resulting
in the total removal of oil residue contamination. The ultrafiltration allowed producing process water directly from the industrial
effluents containing petroleum derivatives.
Presented at the 33rd International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 22–26 May
2006. |
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Keywords: | water treatment ultrafiltration nanofiltration reverse osmosis membrane distillation |
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