Production Kinetic of Glucosamine by Microorganism

• Main Authors: Jui-Wen Hsieh, 謝睿文
• Other Authors: Ho-Shing Wu
• Format: Others
• Language: en_US
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/66255391996107076397

碩士 === 元智大學 === 化學工程與材料科學學系 === 94 === Glucosamine is an amino-monosaccharide and one of the basic constituents of Chitin and Chitosan. Glucosamine is the major component of human inter-articular lubricant connective tissue. It can repair and rebuild the damaged cartilage and it also can cure the disease of osteoarthritis. The objective of this work is to study the parameters affecting the production of glucosamine hydrochloride by microbial fermentation and to obtain the method of separation and purification of glucosamine hydrochloride.This study uses four funguses Rhizopus oligosorus BCRC 31996, Monascus purpures BCRC 31499, Monascus pilosus BCRC31527 and Aspergillus sp. BCRC31742 to product glucosamine hydrochloride by using fermentation.Three parts were discussed in this study.First is the kinetic and strategy by flask culture which conditions include kinds of fungus, mediums, pH value, and carbon and nitrogen source.The experimental result shows that the glucosamine concentration had an optimum value and was 3428mg/L by using Aspergillus sp. BCRC31742 culture in GP medium, the pH controlled an important rate in culture. Second, the kinetics and strategoy by fermenter culture that the factors were pH value, incubation time and carbon and nitrogen source in the 4L fermentor fermentation.The result shown the glucosamine concentration was 2311mg/L; biomass, 10.1g/L; content, 229(mg/g biomass); yield, 92.4mg/g of carbon source; productivity, 13.8mg/L×h-1 that Aspergillus sp. BCRC31742 was incubated in GP medium. Third is the part of analysis and purification of glucosamine. The glucosamine was analyzed with 1-naphthyl isothiocyanate (NITC) as derivatizing agent. The reaction was carried out in pyridine at 50oC for 1 h. The derivative was analyzed of High Performance Liquid Chromatography. The precision of glucosamine is below to 1.69% and the accuracy is to 2.73%. Purify method is the dry cell reacting with 6N HCl at 100oC for 24 h, then neutralization with NaOH to pH 7 to obtain glucosamine hydrochloride aqueous solution. The purity of glucosamine is from 2.29% to 13.4% after the purification process containing depigmentation and condensing by Rotary Evaporator.