Abstract
Chitin and Chitosan obtained from the crustaceans are having more biological value such as physiological compatibility, non-toxicity, bio digestibility, adsorption and chelating capacity. These biological values of chitosan depend on the quality parameters which are directly related to the source of the raw material. In this study, three commercially available crustacean shell waste such as shrimp, crab and squilla were used for the extraction of chitin and chitosan. The chemical treatment of demineralization, deproteinization and deacetylation were used for the production of chitosan. The viscosity quality parameter of the shrimp chitosan (5300cPs) was better than the crab and squilla chitosan. It is due the high solubility (97.65%) of the shrimp chitosan in 1% acetic acid. The degree of deacetylation of the shrimp chitosan (81.24%) directly relates the solubility of the chitosan. The chitosan with these quality parameters considered to be the excellent biological value. The yield of shrimp chitosan (15.4%) was also more when compare to crab and squilla chitosan. These result showed that utilisation of shrimp shell waste for the production of chitin and chitosan will give more economical and biological value along with reduction of environmental pollution.
Highlights
World population growth continuously overtakes the rate of fish production
This study showed that the moisture content of shrimp, crab and squilla were, 21.51%, 20.57 % and 22.59 % respectively
These results had shown lower than the moisture content chitin obtained by Abdulkarim et al in mussel shell (12.90%)1, the reason may be due to the drying conditions of chitin, where the experimental chitin was dried in the hot air oven
Summary
World population growth continuously overtakes the rate of fish production. The FAO Code of Conduct for Responsible Fisheries was concerned about the clear signs of over-exploitation of fish stocks and to recommend new approaches to fisheries management which included conservation, environmental, social, and economic considerations14.The quantity of processing waste generated around 20-80% depends on the species, processing stage, and the technology used.The Indian seafood export was Rs. 9.5 lakhs ton for the year 2015-16 dominated by crustaceans and molluscs. World population growth continuously overtakes the rate of fish production. The FAO Code of Conduct for Responsible Fisheries was concerned about the clear signs of over-exploitation of fish stocks and to recommend new approaches to fisheries management which included conservation, environmental, social, and economic considerations. The quantity of processing waste generated around 20-80% depends on the species, processing stage, and the technology used.The Indian seafood export was Rs. 9.5 lakhs ton for the year 2015-16 dominated by crustaceans and molluscs. The industries reject approximately up to 75 % of total weight of raw material, these can create serious pollution and disposal problems.
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