Abstract
Delignification is a process to remove the lignin content from lignocellulosic biomass to increase hydrolysis efficiency. In other word, the process ensures cellulose parts are more accessible. In the present research, there are two objectives; (i) to optimize the operating parameters of acidified sodium chlorite pretreatment for delignification of RMWS, and (ii) to characterize the RMWS used as feedstock. The two significant variables, reaction temperature and ratio of sodium chlorite to sawdust were optimized using response surface methodology and experiments were performed according to a central composite experimental design in order to enhance the delignification process as well as holocellulose recovery. The experimental design was expressed based on preliminary work and screening process using the combined severity, which ranged from 0.76 to 1.64 for chlorite solution and temperature range from 65 to 85 °C. The experimental results showed the most optimal condition of acidified pretreatment of RMWS was 1.42 for the ratio of sodium chlorite to RMWS at an optimal temperature at 70 °C, resulted with 97% of lignin removal. These results are important for further treatment to finally extract the cellulose.
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This research was supported by internal grants, Universiti Malaysia Pahang, RDU1703325 and PGRS1803111.
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Siti Noredyani, A.R., Zularisam, A.W., Noormazlinah, A., Mimi Sakinah, A.M. (2020). Optimization of Delignification Process from Red Meranti Wood Sawdust (RMWS) Pretreated with Acidified Sodium Chlorite. In: Awang, M., Emamian, S., Yusof, F. (eds) Advances in Material Sciences and Engineering. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-8297-0_18
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