Compositional Changes of Sugar Beet Pulp treated by Concentrated Nitric Acid and Enzymes

Sugar beet pulp contains pectin,which is a good source of fermentable sugar.After a pre-treatment by concentrated phosphoric acid(85%),the sugar beet pulp was further treated by enzymatic saccharification.The commotional changes of the treated sugar beet pulp were investigated.The results show that,within the examined ranges of treatment temperature(0-50 ℃) and time(0-60 min),the higher temperature or longer pre-treated time,the higher the yield of water soluble part of sugar beet pulp and the contents of galacturonic acid,arabinose and glucose in the water soluble part.For enzyme saccharification,increase of reaction temperature and time further improved the contents of cellulose,pectin and arabinose from the sugar beet pulp and the total sugar yield.The pre-treatment was good for the succedent enzymatic hydrolysis on cellulose.