Abstract
Sugarcane bagasse samples were pretreated with ozone via atmospheric O2 pressure plasma. A delignification efficiency of approximately 80 % was observed within 6 h of treatment. Some hemicelluloses were removed, and the cellulose was not affected by ozonolysis. The quantity of moisture in the bagasse had a large influence on delignification and saccharification after ozonation pretreatment of the bagasse, where 50 % moisture content was found to be best for delignification (65 % of the cellulose was converted into glucose). Optical absorption spectroscopy was applied to determine ozone concentrations in real time. The ozone consumption as a function of the delignification process revealed two main reaction phases, as the ozone molecules cleave the strong carbon–carbon bonds of aromatic rings more slowly than the weak carbon–carbon bonds of aliphatic chains.
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Notes
Impurity composition—H2O < 200.0 ppm; CO < 10.0 ppm; NH3 < 25.0 ppm; SO2 < 5.0 ppm; NOx < 2.5 ppm; H2S < 1.0 ppm. The amounts of impurity are despicable. No hydrocarbon compounds were present in our feed gas.
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Acknowledgment
The authors would like to thank FAPESP (2008/58034-0) for partial financial support. We appreciate the assistance given by Livia P. Vasconcellos and Tatiane T. Pereira during the chemical analyses procedures. Finally, the authors are grateful for the bagasse material supplied by Dr. Edgardo O. Gómez and gratefully acknowledge the technical support provided by Renan Henrique S. Fernandes and Anderson R. Pasqual at the milling stage of the bagasse samples.
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Souza-Corrêa, J.A., Oliveira, C., Wolf, L.D. et al. Atmospheric Pressure Plasma Pretreatment of Sugarcane Bagasse: The Influence of Moisture in the Ozonation Process. Appl Biochem Biotechnol 171, 104–116 (2013). https://doi.org/10.1007/s12010-013-0362-4
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DOI: https://doi.org/10.1007/s12010-013-0362-4