화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.31, No.10, 1865-1876, October, 2014
DOI10.1007/s11814-014-0139-7  Export Citation
Modeling of permeate flux and mass transfer resistances in the reclamation of molasses wastewater by a novel gas-sparged nanofiltration
Tejal Manish Patel, and Kaushik Nath†
  • Department of Chemical Engineering, G H Patel College of Engineering & Technology, Vallabh Vidyanagar- 388 120, Gujarat, India
E-mail:
A semi-empirical model has been applied to predict the permeate flux and mass transfer resistances during the cross flow nanofiltration of molasses wastewater in flat-sheet module. The model includes laminar flow regime as well as flow in presence of gas sparging at two different gas velocities. Membrane hydraulic resistance (Rm), osmotic pressure resistance (Rosm) and the concentration polarization resistance (Rcp) were considered in series. The concentration polarization resistance was correlated to the operating conditions, namely, the feed concentration, the trans-membrane pressure difference and the cross flow velocity for a selected range of experiments. There was an appreciable reduction of concentration polarization resistance Rcp spar in presence of gas sparging. Both the concentration polarization resistance Rcp lam and osmotic pressure resistance Rosm decreased with cross-flow velocity, but increased with feed concentration and the operating pressure. Experimental and theoretical permeate flux values as a function of cross flow velocity for both the cases, in the presence and absence of gas sparging, were also compared.
Keywords:Membrane;Nanofiltration;Flux;Molasses;Gas Sparging;Cross Flow Velocity
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