ENZYME RECOVERY BY MEMBRANE SEPARATION METHOD FROM WASTE PRODUCTS OF THE FOOD INDUSTRY.

Recycling waste products of food industry become more and more important: one side because of the environmental matter the other side because of the economic reasons. The most preferred basic material for second generation biofuels is the waste products, food industrial waste products such as sugar chip, straw or bagasse. The cost of the process depends on the cost of the hydrolysis of cellulose/lignocelluloses i.e. the cost of the enzymes. These enzymes are very expensive that’s why it’s so important to find a good enzyme recovery method. In our research programme the membrane separation was used for enzyme recovery. Different ultra-filtration membranes such as a polyether-sulfone membrane with a cut-off value of 5 kDa, (PES5) and thin-film membrane with a cut-off value of 4 kDa (TF4) was used for separation the hydrolyzatethe aim of our work was to determine the optimal conditions for the enzymes separation, the value of the fluxes and the resistances values and the investigate the effect of the ultrasound on the membrane separation. We found that the fluxes are enhanced and the fouling resistance is decreased due to the ultrasound application and we also found that the gel layer resistance is increased during the processing. [ABSTRACT FROM AUTHOR]