tailieunhanh - A facile and efficient pressing meth od for improvement of chitin production

Shrimp head waste has been used as raw materials for production of chitin and protein hydrolysate. In this study, a facile and efficient pressing method was developed to separate the solid and liquid phases from shrimp heads. The different solid/liquid ratios as well as the size of the solid component can be obtained easily by changing the pressing operating parameters. The solid fraction was used to prepare chitin and chitosan. This pressing method can save large amount of water and chemicals in the production of chitin and it can be used in the large-scale. | Journal of Fisheries science and Technology - 2016 A FACILE AND EFFICIENT PRESSING METHOD FOR IMPROVEMENT OF CHITIN PRODUCTION Nguyen Cong Minh1, Pham Thi Dan Phuong2, Nguyen Van Hoa2, Trang Si Trung,2,* Received: 01/8/2016; Revised: 20/9/2016; Accepted: 26/9/2016 ABSTRACT Shrimp head waste has been used as raw materials for production of chitin and protein hydrolysate. In this study, a facile and efficient pressing method was developed to separate the solid and liquid phases from shrimp heads. The different solid/liquid ratios as well as the size of the solid component can be obtained easily by changing the pressing operating parameters. The solid fraction was used to prepare chitin and chitosan. This pressing method can save large amount of water and chemicals in the production of chitin and it can be used in the large-scale. Keywords: shrimp head waste, chitin, pressing method, protein hydrolysate I. INTRODUCTION Shrimp head waste is considered as a source of valuable components including about 6% chitin and 66% protein on the dry basis of the raw material [4,5,8]. In the original form, chitin is linked to proteins by glycosidic bonds. Therefore, the fabrication of chitin requires deproteinization process which is commonly accomplished by using alkali solution. However, it is known that severe alkali treatment results in degradation of chitin polymer chains and also reduces the quality of the protein hydrolysate [9,10]. So far, industrial methods use chemical processes for preparation of chitin from shrimp shells involving: (i) grinding; (ii) demineralization with strong acids; (iii) deproteinization with alkali medium at 90-1000C; (iv) pigment removal using solvent extraction or chemical oxidation [2,3]. Unfortunately, this process often consumes a large amount of chemicals and water due to the remaining protein and others from shrimp meat and viscera. Moreover, this organic fraction can cause an environmental issue. Based on the above problems, it is