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Transport Phenomena in Solid State Fermentation: Oxygen Transport in Static Tray Fermentors
Muniswaran, P.K.A.,Moorthy, S.Sundara,Charyulu, N.C.L.N. The Korean Society for Biotechnology and Bioengine 2002 Biotechnology and Bioprocess Engineering Vol.7 No.6
A mathematical model has been developed for describing the oxygen concentration during the exponential growth of microorganisms, in a static solid substrate bed supported on a tray fermentor. The model equations comprise of one partial differential equation for mass transfer and an ordinary differential equation of growth. After nondimensionlisation, analytical solution tn the model has been obtained by the method of Laplace transforms. An expression for critical thickness of bed is deduced from the model equation. The significance of the model in the design of tray fermentors is discussed. The validity of the discussion is verified by taking an illustration from the literature.
Transport Phenomena in Solid State Fermentation: Oxygen Transport in Static Tray Fermentors
P. K. A. Muniswaran,S. Sundara Moorthy,N. C. L. N. Charyulu 한국생물공학회 2002 Biotechnology and Bioprocess Engineering Vol.7 No.6
A mathematical model has been developed for describing the oxygen concentrationduring the exponential growth of microorganisms, in a static solid substrate bed suported on a tray fermentor. The model equations comprise of one partial differential equation for mass transfer and an ordinary diferential equation of growth. After nondimensionlisation, analytical solution to the model has been obtained by the method of Laplace transforms. An expression for critical thickness of bed is deduced from the model equation. The significance of the model in the detion from the literature.
Hydrolysis of Rice Bran Oil Using Immobilized Lipase in a Stirred-Batch Reactor
Murty, V.Ramachandra,Bhat, Jayadev,Muniswaran, P.K.A. The Korean Society for Biotechnology and Bioengine 2002 Biotechnology and Bioprocess Engineering Vol.7 No.6
Candida cylindracea lipase was immobilized by adsorption on acid washed glass beads. It was observed that protein loading of the support depends on the size of the particle, with smaller particle containing higher amount of protein per unit weight. Initial reaction rate linearly varied up to enzyme concentration of 17.25 U/mL. Amount of free fatty acids produced was linearly proportional up to the enzyme loading of 1650 $\mu$g/g of bead. Achievement of chemical equilibrium took longer time in the case of less protein loading. Degree of hydrolysis was found to decrease in second and third consecutive batch operations on repeated use of immobilized lipase.
Murty, V.Ramachandra,Bhat, Jayadev,Muniswaran, P.K.A. The Korean Society for Biotechnology and Bioengine 2002 Biotechnology and Bioprocess Engineering Vol.7 No.4
Experiments on deactivation kinetics of immobilized lipase enzyme from Candida cyl-indracea were performed in stirred bath reactor using rice bran oil as the substrate and temperature as the deactivation parameter. The data were fitted In first order deactivation model. The effect of temperature on deactivation rate was represented by Arrhenius equation. Theoretical equations were developed based on pseudo-steady state approximation and Michaelis -Menten rate expression to predict the time course of conversion due to enzyme deactivation and apparent half-life of the immobilized enzyme activity in PFR and CSTH under constant feed rate polity for no diffusion limitation and diffusion limitation of first order. Stability of enzyme in these continuous reactors was predicted and factors affecting the stability were analyzed.
Hydrolysis of Oils by Using Immobilized Lipase Enzyme : A Review
Murty, V.Ramachanda,Bhat, Jayadev,Muniswaran, P.K.A. The Korean Society for Biotechnology and Bioengine 2002 Biotechnology and Bioprocess Engineering Vol.7 No.2
This review focuses on the use of immobilized lipase technology for the hydrolysis of oils. The importance of lipase catalyzed fat splitting process, the various immobilization procedures, kinetics, deactivation kinetics, New immobilized lipases for chiral resolution, reactor configurations, and process considerations are all reviewed and discussed.
Hydrolysis of Oils by Using Immobilized Lipase Enzyme: A Review
V. Ramachandra Murty,Jayadev Bhat,P. K. A. Muniswaran 한국생물공학회 2002 Biotechnology and Bioprocess Engineering Vol.7 No.2
This review focuses on the use of immobilized lipase technology for the hydrolysis of oils. The importance of lipase catalyzed fat splitting process, the various immobilization procedures, kinetics, deactivation kinetics, New immobilized lipases for chiral resolution, reactor configurations, and process considerations are all reviewed and discussed.
V. Ramachandra Murty,Jayadev Bhat,P. K. A. Muniswaran 한국생물공학회 2002 Biotechnology and Bioprocess Engineering Vol.7 No.4
Experiments on deactivation kinetics of immobilized lipase enzyme from Candida cylindracea were performed in stirred batch reactor using rice bran oil as the substrate and temperature as the deactivation parameter. The data were fitted in first order deactivation model. The effect of temperature on deactivation rate was represented by Arrhenius equation. Theoretical equations were developed based on pseudo-steady state approximation and Michaelis –Menten rate expression to predict the time course of conversion due to enzyme deactivation and apparent half-life of the immobilized enzyme activity in PFR and CSTR under constant feed rate policy for no diffusion limitation and diffusion limitation of first order. Stability of enzyme in these continuous reactors was predicted and factors affecting the stability were analyzed.
Hydrolysis of Rice Bran Oil Using Immobilized Lipase in a Stirred Batch Reactor
V. Ramachandra Murty,Jayadev Bhat,P. K. A. Muniswaran 한국생물공학회 2002 Biotechnology and Bioprocess Engineering Vol.7 No.6
Candida cylindracea lipase was immobilized by adsorptiIt was observed that protein loading of the suport depends on the size of the particle, with smaller particle containing higher amount of protein per unit weight. Initial reaction rate linearly varied up to enzyme concentration of 17.25 U/mL. Amount of free faty acids produced was linearly proportional up to the enzyme loading of 1650 .g/g of bead. Achievement of chemical equilibrium took longer time in the case of les protein loading. Degree of hydrolysis was found to decrease in second and third consecutive batch operations on repeated use of immobilized lipase.