An increase in delignification of RS was observed with the increase in concentration of NaOH from 0.125% to 1% (w/v) (Table 5). Similar findings were also made by McMillan (1994). The highest level of delignification (57.9%) was obtained with 1% NaOH. As the concentration of NaOH increased, solid losses were also increased from 30.0% to 52.3%. The holocellulose content of 8.00 ± 0.26 g was less in the 1% NaOH pretreatment than in the other treatments (Table 5). The maximum amount of holocellulose (10.59 ± 0.29 g) was obtained with 0.5% NaOH. Based on these findings, 0.5% sodium hydroxide treatment of RS was selected for testing at different time intervals (12, 18, 24, 48 and 72 h). As the time
of treatment increased from 12 to 24 h, the amount of available cellulose increased with a corresponding decrease in the hemicellulose
and lignin contents. From 24 to 72 h, there was no appreciable
difference in cellulose, hemicellulose and lignin contents (data
not shown).
An increase in delignification of RS was observed with the increase in concentration of NaOH from 0.125% to 1% (w/v) (Table 5). Similar findings were also made by McMillan (1994). The highest level of delignification (57.9%) was obtained with 1% NaOH. As the concentration of NaOH increased, solid losses were also increased from 30.0% to 52.3%. The holocellulose content of 8.00 ± 0.26 g was less in the 1% NaOH pretreatment than in the other treatments (Table 5). The maximum amount of holocellulose (10.59 ± 0.29 g) was obtained with 0.5% NaOH. Based on these findings, 0.5% sodium hydroxide treatment of RS was selected for testing at different time intervals (12, 18, 24, 48 and 72 h). As the timeof treatment increased from 12 to 24 h, the amount of available cellulose increased with a corresponding decrease in the hemicelluloseand lignin contents. From 24 to 72 h, there was no appreciabledifference in cellulose, hemicellulose and lignin contents (datanot shown).
การแปล กรุณารอสักครู่..