Separation of organic compounds from wastewater using vacuum assisted pervaporation in a pilot plant


Pervaporation (PV) is a promising alternative to conventional distillation technologies in the separation of liquid mixtures for being economical, energy efficient and environmentally benign. Unlike distillation, it can be operated at low temperature to separate close boiling and even azeotropic liquid mixtures without using any entrainer. In PV the feed mixture is in a direct contact with one side of the dense lyophilized membrane whereas permeate (or pervaporate) is removed in a vapor state from the opposite side into a vacuum or sweeping gas and then condensed. The driving force for the mass transfer of permeants from the feed side to the permeate side of the membrane is a gradient in chemical potential, which is established by applying a difference in partial pressures of the permeants across the membrane. Apart from removal of traces of organics from aqueous stream or organic separation, PV is extensively used for dehydration of various organics specially those forming azeotrope or close boiling liquids with very low relative volatility. Recovery of organic compounds from aqueous solutions in the industry is frequently sought but face difficulties in the separation especially when an azeotrope is involved. The conventional methods such as azeotropic distillation, extractive distillation and liquid liquid extraction exhibit some drawbacks, for which pervaporation could an option for energy efficient separation

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Project Info

  • Principal Investigator:
    Dr. Kaushik Nath
  • Co Investigator
    Prof. Haresh K Dave
  • Duration
    2 Years
  • Amount
    Rs .150000
  • Funding Agency
    Instituion of Engineers (India)
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