Development of Bergamot Yam Soymilk Yogurt

摘要

[Objectives]This study was conducted to develop a bergamot yam soymilk yogurt.[Methods]With bergamot yam and soybeans as the main raw materials,the nutritious bergamot yam soymilk yogurt was finally obtained through soymilk deodorization,strain acclimation and process optimization.[Results]Soybeans were soaked in a 1∶1 mixture of 0.2%sodium chloride and 0.2%sodium bicarbonate for 10 h,and then added with water for grinding,and the obtained slurry was filtered.The filtrate was heated at 100°Cfor 20 min on a low fire and mixed with skim milk in a ratio of 6∶4,and the obtained soymilk achieved the best deodorizing effect.Strains adapted to the soybean milk fermentation system were obtained by gradually increasing the ratio of soybean milk in the acclimation medium and performing passage.The curding time before the product acclimation was 6.5 h,and that after acclimation was 5.8 h,which meant that the time was shortened by 0.7 h,and the acidity increased significantly.Finally,an orthogonal experiment was carried out,determining that the optimal fermentation process was soybean-to-water ratio 1∶5,sucrose 8%,bergamot yam 8%,and fermentation time 6 h.[Conclusions]This study provides a reference for the deep processing of bergamot yam.