Research Progress on Comprehensive Extraction Technology of Prawn Processing Scraps

With the rapid development of shrimp processing industry in China,the amount of processing leftovers has increased dramatically,mainly including shrimp head,shell and tail. A large part of these leftovers have not been utilized,resulting in waste of resources. Factories generally use simple methods such as chemical methods to extract chitin,protein,astaxanthin and shrimp oil. The yield is low,the purity is not high,the comprehensive utilization rate is poor,and the use of a large number of chemical reagents is easy to cause environmental pollution. Recent research has discovered new methods for microbial fermentation,supercritical CO₂ extraction,ionic liquids and other methods for extracting nutrients from shrimp processing waste,which are not only more environmentally friendly,but also improve yield and purity and avoid damage and loss of active substances.In this paper,the extraction methods of nutrients in shrimp processing waste are reviewed,in order to provide a basis for further efficient development and utilization of shrimp processing waste resources.