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Enantiospecific Membrane Processes
Giorno, Lidietta The Membrane Society of Korea 1999 Korean Membrane Journal Vol.1 No.1
Membrane technology can be applied in two ways to produce pure enantiomers. In one case a membrane separation process can be cmbined with an enantiospecific reaction to obtain so-called 'en-antiospecific membrane reacto' These systems are useful to carry out asymmetric synthesis or kinetic resolution and simulatneously separate the produced enantiomer. As for general membrane reactors the result is a more compact system with a higher conversion: in fact removal of a product drives equilibrium-limited reactions towards completion. The other way to apply membrane technology to chiral production is the use of intrinsically enantioselective membranes that are able to distinguish between two isomers favouring preferential transport of only one isomer in absence of reaction. In this paper the current development of chiral membrane processes will be discussed.
Bio-degradation of Phenol in Wastewater by Enzyme-loaded Membrane Reactor: Numerical Approach
Seung-Hak CHOI,Francesco SCURA,Giuseppe BARBIERI,Rosalinda MAZZEI,Lidietta GIORNO,Enrico DRIOLI,Jeong-Hoon KIM 한국막학회 2009 멤브레인 Vol.19 No.1
A mathematical model was written for simulating the removal of phenol from wastewater in enzyme-loaded membrane reactor (EMR). The numerical simulation program was developed so as to predict the degradation of phenol through an EMR. Numerical model proves to be effective in searching for optimal operating conditions and creating an optimal microenvironment for the biocatalyst in order to optimize productivity. In this study, several dimensionless parameters such as Thiele Modulus (Φ2, dimensionless Michaelis-Menten constant (ξ), Peclet number (Pe) were introduced to simplify their effects on system efficiency. In particular, the study of phenol conversion at different feed compositions shows that low phenol concentrations and high Thiele Modulus values lead to higher reactant degradation.
Bio-degradation of Phenol in Wastewater by Enzyme-loaded Membrane Reactor: Numerical Approach
Barbieri, Giuseppe,Choi, Seung-Hak,Scura, Francesco,Mazzei, Rosalinda,Giorno, Lidietta,Drioli, Enrico,Kim, Jeong-Hoon The Membrane Society of Korea 2009 멤브레인 Vol.19 No.1
A mathematical model was written for simulating the removal of phenol from wastewater in enzyme-loaded membrane reactor (EMR). The numerical simulation program was developed so as to predict the degradation of phenol through an EMR. Numerical model proves to be effective in searching for optimal operating conditions and creating an optimal microenvironment for the biocatalyst in order to optimize productivity. In this study, several dimensionless parameters such as Thiele Modulus (${\phi}^2$, dimensionless Michaelis-Menten constant ($\xi$), Peclet number (Pe) were introduced to simplify their effects on system efficiency. In particular, the study of phenol conversion at different feed compositions shows that low phenol concentrations and high Thiele Modulus values lead to higher reactant degradation.