Comparison of ginger powder properties by three processing technology

:Ginger powder was made by three different drying methods,hot air drying,vacuum freeze drying and spray drying.The properties of ginger powder included yield,water content,oil content and zingiberone content were compared. The results showed that the order of water content was as follows;vacuum freeze drying hot air drying spray drying.The yield order from each drying method was;vacuum freeze drying hot air drying spray drying.Oil content order was;hot air drying vacuum freeze drying spray drying.There was no difference on zingiberone content of zingiber powder obtained among three drying methods.Sensory fuzzy comprehensive evaluation showed that the zingiber powder obtained by vacuum freeze drying technology had the best quality.Based on the above indicators,the performance of vacuum freeze drying in keeping the ginger oil and zingberone content is better than hot air drying and spray drying. The same result showed in ginger color,taste,exterior and texture,etc.The yield by vacuum freeze drying is also significantly higher than the other two technologies.The vacuum freeze drying technology is a good choice for industrial production of ginger powder.