5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: not found
      • Article: not found

      Wet oxidation as a pretreatment method for enhancing the enzymatic convertibility of sugarcane bagasse

      , ,
      Enzyme and Microbial Technology
      Elsevier BV

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Related collections

          Most cited references22

          • Record: found
          • Abstract: not found
          • Article: not found

          Hydrolysis of lignocellulosic materials for ethanol production: a review

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            A comparison of liquid hot water and steam pretreatments of sugar cane bagasse for bioconversion to ethanol

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Characterization of degradation products from alkaline wet oxidation of wheat straw.

              Alkaline wet oxidation pre-treatment (water, sodium carbonate, oxygen, high temperature and pressure) of wheat straw was performed as a 2(4-1) fractional factorial design with the process parameters: temperature, reaction time, sodium carbonate and oxygen. Alkaline wet oxidation was an efficient pre-treatment of wheat straw that resulted in solid fractions with high cellulose recovery (96%) and high enzymatic convertibility to glucose (67%). Carbonate and temperature were the most important factors for fractionation of wheat straw by wet oxidation. Optimal conditions were 10 min at 195 degrees C with addition of 12 bar oxygen and 6.5 g l(-1) Na2CO3. At these conditions the hemicellulose fraction from 100 g straw consisted of soluble hemicellulose (16 g), low molecular weight carboxylic acids (11 g), monomeric phenols (0.48 g) and 2-furoic acid (0.01 g). Formic acid and acetic acid constituted the majority of degradation products (8.5 g). The main phenol monomers were 4-hydroxybenzaldehyde, vanillin, syringaldehyde. acetosyringone (4-hydroxy-3,5-dimethoxy-acetophenone), vanillic acid and syringic acid, occurring in 0.04-0.12 g per 100 g straw concentrations. High lignin removal from the solid fraction (62%) did not provide a corresponding increase in the phenol monomer content but was correlated to high carboxylic acid concentrations. The degradation products in the hemicellulose fractions co-varied with the pre-treatment conditions in the principal component analysis according to their chemical structure, e.g. diacids (oxalic and succinic acids), furan aldehydes, phenol aldehydes, phenol ketones and phenol acids. Aromatic aldehyde formation was correlated to severe conditions with high temperatures and low pH. Apart from CO2 and water, carboxylic acids were the main degradation products from hemicellulose and lignin.
                Bookmark

                Author and article information

                Journal
                Enzyme and Microbial Technology
                Enzyme and Microbial Technology
                Elsevier BV
                01410229
                February 2007
                February 2007
                : 40
                : 3
                : 426-432
                Article
                10.1016/j.enzmictec.2006.07.015
                86ed39a7-a50f-4c15-b605-ce4e0a6f3426
                © 2007

                http://www.elsevier.com/tdm/userlicense/1.0/

                History

                Comments

                Comment on this article