Study on Reducing Sugar Production from Residues of Bamboo Processing by Acid Hydrolysis

[Objective] The aim was to realize efficient utilization of residues of bamboo processing and study its acid hydrolysis technology.[Method] The influence factors of acid hydrolysis of bamboo powder were studied through single-factor test.With yield of total reducing sugar as index,the optimum reaction condition for reducing sugar production by hydrolyzing bamboo powder with dilute sulfuric acid was obtained through analysis.[Result] The results from single-factor tests showed that when material-liquid ratio was 1∶5-1∶7,the yield rate of reducing sugar was increased along with the increase of thick acid volume;when material-liquid ratio was 1∶5 and 1∶8,the yield rates of reducing sugar were 44.0% and 41.6% resp.;when the 1st hydrolysis temperature was 60 ℃,the yield rate of reducing sugar was highest,being 65.3%;when sulfuric acid concn.was 15%-30%,the yield rate of reducing sugar changed little;the yield rate of reducing sugar was reduced along with extending of hydrolysis time;when the 2nd hydrolysis time was 1 h,the yield rate of reducing sugar was highest,being 66.3%.The results from orthogonal test showed that the influence of the 1st hydrolysis temperature was most and that of the 2nd hydrolysis time and bamboo powder/thick sulfuric acid ratio was least;the optimum reaction condition was as follows:the(W/V)ratio of bamboo powder to thick acid was 1∶6,the 1st hydrolysis temperature was 50 ℃,the 2nd hydrolysis temperature was 100 ℃,the concn.of dilute sulfuric acid was 20% and the hydrolysis time was 1 h.[Conclusion] This study provided references for developing and utilizing residues of bamboo processing.