Article ID Journal Published Year Pages File Type
4472387 Waste Management 2011 5 Pages PDF
Abstract

Food waste generated in Korea is rich in carbohydrate as high as 65% of total solids. Using the food waste, the feasibility of ethanol production was investigated in a lab-scale fermentor. Pretreatment with hydrolyzing enzymes including carbohydrase, glucoamylase, cellulase and protease were tested for hydrolysis of food waste. The carbohydrase was able to hydrolyze and produce glucose with a glucose yield of 0.63 g glucose/g total solid.Enzymatic hydrolysis and ethanol fermentation by using carbohydrase and Saccharomyces cerevisiae were conducted in the batch mode. For separated hydrolysis and fermentation (SHF), ethanol concentration reached at the level corresponding to an ethanol yield of 0.43 g ethanol/g total solids. For simultaneous saccharification and fermentation (SSF), the ethanol yield was 0.31 g ethanol/g total solids. During the continuous operation of SHF, the volumetric ethanol production rate was 1.18 g/l h with an ethanol yield of 0.3 g ethanol/g total solids. For SSF process, the volumetric ethanol production rate was 0.8 g/l h with an ethanol yield of 0.2 g ethanol/g total solids.

► Ethanol production using Saccharomyces cerevisiae and carbohydrase from food waste. ► SHF process in continuous mode produce ethanol at 1.18 g/l h with an ethanol yield of 0.3 g ethanol/g total solids. ► SSF process produce ethanol at 0.8 g/l h with an ethanol yield of 0.2 g ethanol/g total solids.

Related Topics
Physical Sciences and Engineering Earth and Planetary Sciences Geotechnical Engineering and Engineering Geology
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