Comparison of pretreatment methods for the enhancement of fermentable sugar production from kitchen waste

• Published in: CHUSER 2012 - 2012 IEEE Colloquium on Humanities, Science and Engineering Research
• Main Author: Jamaludin S.I.S.; Kadir S.A.S.A.; Safri N.H.M.; Aba N.D.; Krishnan J.
• Format: Conference paper
• Language: English
• Published: 2012
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877643100&doi=10.1109%2fCHUSER.2012.6504415&partnerID=40&md5=a4eb7f22d69052fc50bbc14f785fa59f

The effect of different chemicals (H2SO4, NaOH and H2O2) pretreatments at various concentrations and microwave-assisted chemical (NaOH, H2SO4 + NaOH and H 2SO4 + NaOH + H2O2) pretreatments on conversion of lignocelluloses in kitchen waste for maximum glucose yield were comparatively investigated. Overall, pretreatment by dilute H2SO 4 (2%) achieved the highest glucose yield of 39.43 g/L with glucose recovery of 98.86%. Alkali pretreatment using NaOH at different concentration shows no significant effect on the glucose generation (0.61-1.13 g/L) when NaOH concentration was increased. However, the combination of alkali pretreatment with microwave treatment resulted in a drastic increase of glucose yield in kitchen waste sample. Meanwhile, H2O2 pretreatment seems to have little effect on the glucose yield (1.53-3.05 /L) when the concentration of H2O2 was increased. But when this oxidizing agent was added to H2SO4 and NaOH -microwave treatment, it increases the glucose yield from 10.36 to 13.31 g/L. With respect to glucose recovery, all microwave-assisted chemical pretreatment achieved the value of more than 90% glucose recovery. © 2012 IEEE.