关键词: 虾加工废弃物, 生物转化, 脱腥, 鸡油菌, 抗氧化胞外多糖

Abstract: Shrimp processing waste was converted and deodorized for production of antioxidant polysaccharides by Cantharellus cibarius using response surface methodology. The optimal conditions for highest mycelium biomass and exopolysaccharides production were determined as follows: the solid to liquid ratio was 9.016%,  volume of liquid medium was 120.292 mL, and 1.208% concentration of glacial acetic acid. Under the optimal conditions, mycelium biomass and exopolysaccharides production reached 28.407±0.842 g/L and 7.009±0.517 g/L, respectively in validation test, which were consistent with the predicted values (RSD <5%). These values were improved by 60.564% and 114.737%, respectively compared to the initial culture conditions. The scores of deodorization were 3.056±0.115 and 3.694±0.076 at based and optimized validation bioconversion. The resulting exopolysaccharides had high antioxidant activities with total antioxidant capacity of 1.952±0.041 U/mg，superoxide anion scavenging capacity of 93.223±1.174 U/g and hydroxyl radical scavenging capacity of 60.291±0.638 U/mg. The study provided an alternative method for production of antioxidant polysaccharides from shrimp processing waste by Cantharellus cibarius.

Key words: shrimp processing wastes, bioconversion, deodorization, Cantharellus cibarius, antioxidant exo-polysaccharides