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Research Article Open access CC BY 4.0

Improvement of Delignification, Desilication and Cellulosic Content Availability in Paddy Straw via Physico-chemical Pretreatments

M. G. Mona Fatin Syazwanee, A. G. Nurul Shaziera, M. Z. Nur Ain Izzati, A. A. Nor Azwady, M. Muskhazli

Annual Research & Review in Biology · pp. 1–11 · Published 25 Sep 2018

10.9734/ARRB/2018/40947

Abstract

Aim: Paddy straw consists of cellulose and hemicellulose as their plant materials leading to their potential to produce bioethanol through several processes such as pretreatment, enzymatic hydrolysis and ethanol fermentation. Among these processes, pretreatment of paddy straw is particularly important for enzymatic hydrolysis process as they are being limited by the presence of ash and silica content. This study was set to observe the effect of different pretreatments on cellulose, hemicellulose, lignin and ash content of paddy straw. Place and Duration of Study: This study was conducted in Department of Biology, Faculty of Science, Universiti Putra Malaysia, between October 2015 and June 2016. Methodology: Pretreatments comprises the combination of physical (mechanical) and chemical treatments to modify the lignocellulosic structure while reduce lignin and separate silica content in paddy straw fibre. Paddy straw was prepared into three different sizes (2mm, 5mm and 8 mm) for physical treatment. Autoclave, boiled and four different concentrations (0.5%, 1%, 2% and 5% (v/v) and (w/v) respectively) of nitric acid and sodium hydroxide, respectively for chemical treatment were used on paddy straw. Results: Size five millimeter paddy straw showed the highest cellulose content (35.61%) compared to the other sizes and when the paddy pretreated with 2% (w/v) sodium hydroxide (NaOH), the percentage of cellulose content escalated to 72.47%. Pretreatment of 2% (w/v) NaOH have performed the most efficient delignification and desilication process (1.02% lignin; 5.44 ash content); and the performance was supported with SEM images on surface area of the paddy straw with large distortion caused by the treatment. Conclusion: Therefore, a physico-chemical pretreatment of size 5 mm and 2% (w/v) NaOH was found to be the most suitable condition to break the cellulose-lignin complex and make the paddy straw becomes feasible for biofuel production.

Bioethanol delignification lignocellulosic biomass pretreatment SEM images

References (32)

  1. 1 Features of promising technologies for pretreatment of lignocellulosic biomass [DOI]
  2. 2 Methods for Pretreatment of Lignocellulosic Biomass for Efficient Hydrolysis and Biofuel Production [DOI]
  3. 3 Pretreatment of Lignocellulosic Wastes to Improve Ethanol and Biogas Production: A Review [DOI]
  4. 4 Hemicelluloses for fuel ethanol: A review [DOI]
  5. 5 Recent updates on different methods of pretreatment of lignocellulosic feedstocks: a review [DOI]
  6. 6 Chemical and Physicochemical Pretreatment of Lignocellulosic Biomass: A Review [DOI]
  7. 7 Bioethanol production from rice straw: An overview [DOI]
  8. 8 Substrate Pretreatment: The Key to Effective Enzymatic Hydrolysis of Lignocellulosics? [DOI]
  9. 9 Chemical, structural, and thermal characterizations of alkali-soluble lignins and hemicelluloses, and cellulose from maize stems, rye straw, and rice straw [DOI]
  10. 10 Fungal Bioconversion of Lignocellulosic Residues; Opportunities & Perspectives [DOI]
  11. 11 Effect of dilute acid pretreatment of rice straw on structural properties and enzymatic hydrolysis [DOI]
  12. 12 Fractionating recalcitrant lignocellulose at modest reaction conditions [DOI]
  13. 13 Rice straw, the role of silica and treatments to improve quality [DOI]
  14. 14 Physicochemical Characterization of Rice Straw Pretreated with Sodium Hydroxide in the Solid State for Enhancing Biogas Production [DOI]
  15. 15 Ethanol production from dilute-acid pretreated rice straw by simultaneous saccharification and fermentation with Mucor indicus, Rhizopus oryzae, and Saccharomyces cerevisiae [DOI]
  16. 16 Review of pretreatment processes for lignocellulosic ethanol production, and development of an innovative method [DOI]
  17. 17 Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations [DOI]
  18. 18 Structural analysis for lignin characteristics in biomass straw [DOI]
  19. 19 Enhanced enzymatic saccharification of rice straw by microwave pretreatment [DOI]
  20. 20 Steam explosion pretreatment of softwood: the effect of the explosive decompression on enzymatic digestibility [DOI]
  21. 21 THE CHANNELING OF ENERGETIC ATOMS IN CRYSTAL LATTICES [DOI]
  22. 22 Pretreatment of wheat straw leads to structural changes and improved enzymatic hydrolysis [DOI]
  23. 23 Comparison of Three Microwave/Chemical Pretreatment Processes for Enzymatic Hydrolysis of Rice Straw [DOI]
  24. 24 The Implications of Lignocellulosic Biomass Chemical Composition for the Production of Advanced Biofuels [DOI]
  25. 25 Dilute acid pretreatment of rice straw, structural characterization and optimization of enzymatic hydrolysis conditions by response surface methodology [DOI]
  26. 26 Identification of Side-Chain Structures in a Poplar Lignin Using Three-Dimensional HMQC−HOHAHA NMR Spectroscopy [DOI]
  27. 27 Saccharification of rice straw by cellulase from a local Trichoderma harzianum SNRS3 for biobutanol production [DOI]
  28. 28 Effect of steam explosion pretreatment with ultra-high temperature and pressure on effective utilization of softwood biomass [DOI]
  29. 29 Paddy straw as substrate for ethanol production [DOI]
  30. 30 Physico-chemical pretreatment technologies of bioconversion efficiency of Paulownia tomentosa (Thunb.) Steud. [DOI]
  31. 31 Process Optimization to Prepare High-purity Amorphous Silica from Rice Husks via Citric Acid Leaching Treatment † [DOI]
  32. 32 Effect of Chemical Fractionation Treatments On Silicon Dioxide Content and Distribution in Oryza Sativa [DOI]

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