PENGARUH PROSES DELIGNIFIKASI PADA PRODUKSI GLUKOSA DARI TONGKOL JAGUNG DENGAN HIDROLISIS ASAM ENCER

The dilute acid hydrolysis of corn cob for glucose production has faced barrier because of lignin. In this research, an effective lignin destruction process by alkali hydrolysis which affects glucose production from corn cob as lignocellulose biomass was investigated. Alkali hydrolysis called delignification was performed at 55oC for 4 hr with various NaOH concentrations: 5%, 10% and 15%-wt. It was found that optimal NaOH concentration for lignin reduction was 15%-wt and the percentage of reduction was 89.3%. The untreated and NaOH 15%-wt treated solid fraction were hydrolyzed by 0.75%-wt H2SO4 with various times and temperatures. The glucose content of liquid fraction from hydrolysis was analyzed. The result showed that the yield of glucose for NaOH 15% -wt treated corn cob was higher than that of untreated corn cob for various temperatures and operation times. It implied the destruction of lignin structure would enhance the reactivity of acid catalyst for diluted acid hydrolysis process.