Production of lactic acid from vine-trimming wastes and viticulture lees using a simultaneous saccharification fermentation method

摘要: An effective process for the chemical–biotechnological utilization of trimming wastes vineshoots, an agricultural waste with little use, is reported. Initial treatment sulfuric acid (prehydrolysis) allowed solubilization hemicelluloses to give xylose and glucose-containing liquors (suitable make fermentation media lactic production Lactobacillus pentosus) a solid phase containing cellulose lignin. The residues from prehydrolysis were treated NaOH in order increase their cellulase digestibility. In alkaline treatments, effects temperature (in range, 50–130 °C), reaction time (30–120 min) concentration (4–12 wt% solution) on composition susceptibility enzymatic hydrolysis assessed by means experimental plan factorial structure. lignin content decreased, whereas towards increased temperature, within tested range. Using cellulosic achieved under harsher conditions, favorable kinetics during simultaneous saccharification carried out L rhamnosus observed. nutrients employed complete MRS broth cheaper medium developed using viticulture lees coming white wine making technology. all cases final was similar, although volumetric productivity lower when due inhibitory over hydrolysis. Copyright © 2004 Society Chemical Industry