Hydrolysis of Cellulosic Material Using Dicarboxylic Acids

• Main Author: Rachmat, Alvin
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/41971
• Institution: Institut Teknologi Bandung

Glucose is a substrate for many products, for example, glucose is used as substrate for butanol fermentation, lactic acid fermentation and ethanol fermentation. Glucose can be obtained from starch. Nowadays, glucose can be produced from cellulose. Processes to get glucose from cellulose is by hydrolysis. One of method for hydrolysis is by adding acids. Acids used to hydrolysis is divided into two kind that is organic acid and mineral acid. Organic acids, especially dicarboxylic acids shows ability to hydrolyze cellulose with less of byproducts than inorganic acids, and compared to enzyme its much better from price and time. Cassava pulp is byproduct of tapioca flour factory. Besides starch, cassava pulp contain of fibre which has cellulose and hemicelullose. Yield of glucose can be maximize with hydrolyzing starch and cellulose in cassava pulp. In this research, we investigate the performance of dicarboxylic acids such as L-tartaric acids, tartronic acid, and maleic acid to hydrolyze cellulose (filter paper) to glucose. Every type of dicarboxylic acids tested with three kind of concentration, so in the total we use nine variation. Acid that gives high glucose yield will be applied to hydrolize the cassava pulp. Based on the research result, the use of tartronic acid as catalyst for hydrolizing cellulose (filter paper) give the highest glucose yield among the other acids. The glucose yield is 17,715% of theoretic glucose from the consumed cellulose in concentration of tartronic acid 1 g/100 g cellulose. Tartronic acid application for hydrolyzing cassava pulp give yield of 1% from the consumed starch and cellulose of cassava pulp and can hydrolize the starch and cellulose contained in cassava pulp simultaneously. The low value of yield in hydrolyzing cellulose and hydrolyzing cassava pulp caused by oligosaccharide that yet to hydrolize to glucose.