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Development of a Pilot-ecofriendly Process for Chitosan Production from Waste Shrimp Shells

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Abstract

New results are presented on a pilot and ecofriendly process to produce chitosan from waste shrimp shells. The process comprises demineralization with citric acid, enzymatic deproteinization with papain or bromelain to produce chitin and deacetylation to obtain chitosan (yield of 1 kg chitosan/kg shrimp shell, 64% deacetylated, 87.5% deproteinized and 98% demineralized). Shell particles of 1–25 mm were used instead of the shell powder that has been used in many studies. The developed process showed important technical and environmental advantages compared to the conventional process. A 10% increment in chitosan yield was obtained due a lower chitin hydrolysis. The ecofriendly process has 24% lower consumption of water. Residual water from citric acid demineralization does not need to be neutralized and can be re-circulated after the citrate salts recovery. Citrate salts are value-added byproducts for nutritional supplements and are easily recovered due to their low solubilities. Residual water from enzymatic deproteinization does not require neutralization and can be treated easier than water from the conventional process. Dissolved solids could be recovered by evaporation and used as animal feedstock for pink-colored fishes. The use of organic acids and enzymes in chitin extraction, compared to HCl and NaOH, does not require special materials for the reactors, reducing investment costs.

Highlights

• Ecofriendly process uses citric acid and enzymes instead of HCl and NaOH

• 10% increment in chitosan yield was obtained due a lower chitin hydrolysis

• Ecofriendly process has a 24% lower consumption of water

• Residual water does not need to be neutralized and can be re-used

• Citrate salts, proteins and carotenoids are value-added byproducts

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Data Availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

The authors gratefully acknowledge the financial support provided by “Ministerio de Ciencia Tecnología e Innovación – MINCIENCIAS – Colombia” and “Gobernación de Nariño (Colombia)” through Contract 80740-225-2019 (CONVOCATORIA I+D+i NARIÑO 818-2018).

Funding

This work was supported by “CONVOCATORIA I + D + i NARIÑO 818–2018”, Contract 80740–225-2019.

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by all the authors. The first draft of the manuscript was written by William Pérez and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Luis Alberto Rios.

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The authors have no relevant financial or non-financial interests to disclose.

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Pérez, W.A., Marín, J.A., López, J.N. et al. Development of a Pilot-ecofriendly Process for Chitosan Production from Waste Shrimp Shells. Environ. Process. 9, 55 (2022). https://doi.org/10.1007/s40710-022-00605-8

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  • DOI: https://doi.org/10.1007/s40710-022-00605-8

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