Chitin and Chitosan Extracted from Shrimp Waste Using Fish Proteases Aided Process: Efficiency of Chitosan in the Treatment of Unhairing Effluents
In: Journal of polymers and the environment, Jg. 22 (2014), Heft 1, S. 78-87
Online
academicJournal
- print, 65 ref
Zugriff:
Extraction and depolymerisation of chitin and chitosan from shrimp waste material was carried out using fish proteases aided process. A high deproteinization level (80 %) was recorded with an Enzyme/Substrate ratio of 10 U/mg. The demineralization of shrimp waste was completely achieved within 6 h at room temperature in HCl 1.25 M, and the residual content of calcium in chitin was below 0.01 %. The degree of N-acetylation, calculated from the 13C CP/MAS-NMR spectrum, was 85 %. The chitin obtained was converted to chitosan by N-deacetylation. X-ray diffraction patterns also indicated two characteristics crystalline peaks approximately at 10° and 20° (2θ). Chitosan was then evaluated in the treatment of unhairing effluents from the tanning industry. A result showed that chitosan as a coagulant has good performance in alkaline pH and at concentration of 0.5 g/L. Within these conditions, chitosan could decrease turbidity value, total suspended solids (89 % at 1.5 g/L), biological oxygen demand (33.3 % at 1.5 g/L) and chemical oxygen demand (58.7 % at 1.5 g/L).
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Chitin and Chitosan Extracted from Shrimp Waste Using Fish Proteases Aided Process: Efficiency of Chitosan in the Treatment of Unhairing Effluents
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Autor/in / Beteiligte Person: | SILA, Assaâd ; MLAIK, Najwa ; SAYARI, Nadhem ; BALTI, Rafik ; BOUGATEF, Ali |
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Zeitschrift: | Journal of polymers and the environment, Jg. 22 (2014), Heft 1, S. 78-87 |
Veröffentlichung: | New York, NY: Springer, 2014 |
Medientyp: | academicJournal |
Umfang: | print, 65 ref |
ISSN: | 1566-2543 (print) |
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