Study on drying of white shrimp by combined freeze and microwave vacuum

The optimal drying conditions of microwave vacuum combined with vacuum freeze were studied by adopting the L9(34)orthogonal experiment.By range analysis of data,it was found that the capability of effect of factors on the recovery rate:the conversion point of water content microwave power microwave time microwave vacuum.The optimum compounding was composed as follows:conversion point of water content 50%,microwave time 25s,microwave power 330W,microwave vacuum 0.07MPa.The variance analysis showed that the recovery rate was significantly influenced by the conversion point of water content,microwave power,microwave time except microwave vacuum.The result of the variance analysis was the same as the range analysis.Furthermore,the regression equation between the recovery rate and related factors was extremely remarkable.