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<p>Growing environmental concerns associated with plastic pollution have intensified the search for biodegradable biopolymers as sustainable alternatives. Among these, cellulose—a naturally occurring polymer present in plants and algae—stands out, particularly in its nanostructured forms. <i>Chlorella sorokiniana</i> is a promising cellulose source due to its rapid growth, low production costs, ability to capture CO₂, and absence of lignin. In this research, <i>C. sorokiniana</i> was cultivated under autotrophic conditions in low-cost, custom-made PET bioreactors, achieving a biomass of 1.23 ± 0.31 g L<sup>-1</sup>. Chemical extraction using sulfuric acid and hydrogen peroxide was then employed to obtain microcrystalline (MCC) and nanocrystalline cellulose (NCC). The cellulose content extracted from the dried biomass was between 9.00 to 10.23% determined by gravimetric analysis and enzymatic hydrolysis. Structural and compositional confirmation of MCC and NCC was achieved through Scanning Electron Microscopy, FT-IR spectroscopy, and X-ray diffraction. The findings confirm that <i>C. sorokiniana</i> can serve as a viable and cost-efficient source for nanocellulose production using scalable techniques.</p>

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Production of microcellulose and crystalline nanocellulose from the microalga Chlorella sorokiniana

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Gustavo Raúl Reyna-Martínez,
  • Ulrico Javier López-Chuken,
  • Julio César Beltrán-Rocha,
  • Francisco Guadalupe Avalos-Alanís,
  • Alma Elizabeth Gómez-Loredo,
  • Leonardo Chávez-Guerrero,
  • Julio Silva-Mendoza

摘要

Growing environmental concerns associated with plastic pollution have intensified the search for biodegradable biopolymers as sustainable alternatives. Among these, cellulose—a naturally occurring polymer present in plants and algae—stands out, particularly in its nanostructured forms. Chlorella sorokiniana is a promising cellulose source due to its rapid growth, low production costs, ability to capture CO₂, and absence of lignin. In this research, C. sorokiniana was cultivated under autotrophic conditions in low-cost, custom-made PET bioreactors, achieving a biomass of 1.23 ± 0.31 g L-1. Chemical extraction using sulfuric acid and hydrogen peroxide was then employed to obtain microcrystalline (MCC) and nanocrystalline cellulose (NCC). The cellulose content extracted from the dried biomass was between 9.00 to 10.23% determined by gravimetric analysis and enzymatic hydrolysis. Structural and compositional confirmation of MCC and NCC was achieved through Scanning Electron Microscopy, FT-IR spectroscopy, and X-ray diffraction. The findings confirm that C. sorokiniana can serve as a viable and cost-efficient source for nanocellulose production using scalable techniques.