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<p>Chitin, a naturally occurring biopolymer, is produced by various marine organisms such as prawns, crabs, lobsters, shrimp, and squid, with shell chitin content typically ranging from 14 to 35%. This study focused on converting shrimp and crab shell waste into valuable products through the extraction of chitin and its derivative, chitosan. The extraction process involved several steps: deproteinization, demineralization, decolorization, and deacetylation. The resulting biopolymers were characterized using Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). FTIR confirmed the presence of characteristic chitin functional groups, XRD revealed a high crystallinity similar to commercial chitin, and SEM demonstrated structural differences between biologically and chemically extracted chitin, with the biological method producing a more homogeneous and porous structure. In addition, bacterial identification was conducted via 16S rRNA sequencing, leading to the identification of <i>Cytobacillus firmus</i> PBD strain, which was assigned the NCBI accession number PP680748. Bioplastics were synthesized from the extracted chitosan by blending it with glycerol and cassava starch to form biodegradable polymer films. This study presents a sustainable, eco-friendly method for chitin extraction using lactic acid bacteria, offering an alternative to traditional chemical-based processes. The findings underscore the potential of bioconversion in transforming shell waste into chitin and its derivatives, providing an effective strategy for waste valorization and contributing to environmental sustainability.</p>

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Chitosan from Shells of Crustaceans and its Application in the Synthesis of Biodegradable Polymers

  • 期刊论文

  • 发表日期：

    2025年4月24日

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  • Paul Beulah Balaraj Frenchibai,
  • Ravikumar Vinayagam,
  • Deepakkumar Ambigapathi,
  • Ganesh Kumar Anbazhagan,
  • Lokesh Elumalai,
  • Sankarganesh Palaniyandi,
  • Nandagopal Siddan,
  • Gopukumar Sivakumar Thangam,
  • Kirubakaran Dharmalingam

摘要

Chitin, a naturally occurring biopolymer, is produced by various marine organisms such as prawns, crabs, lobsters, shrimp, and squid, with shell chitin content typically ranging from 14 to 35%. This study focused on converting shrimp and crab shell waste into valuable products through the extraction of chitin and its derivative, chitosan. The extraction process involved several steps: deproteinization, demineralization, decolorization, and deacetylation. The resulting biopolymers were characterized using Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and X-ray Diffraction (XRD). FTIR confirmed the presence of characteristic chitin functional groups, XRD revealed a high crystallinity similar to commercial chitin, and SEM demonstrated structural differences between biologically and chemically extracted chitin, with the biological method producing a more homogeneous and porous structure. In addition, bacterial identification was conducted via 16S rRNA sequencing, leading to the identification of Cytobacillus firmus PBD strain, which was assigned the NCBI accession number PP680748. Bioplastics were synthesized from the extracted chitosan by blending it with glycerol and cassava starch to form biodegradable polymer films. This study presents a sustainable, eco-friendly method for chitin extraction using lactic acid bacteria, offering an alternative to traditional chemical-based processes. The findings underscore the potential of bioconversion in transforming shell waste into chitin and its derivatives, providing an effective strategy for waste valorization and contributing to environmental sustainability.