浙江农业学报 ›› 2026, Vol. 38 ›› Issue (6): 1099-1111.DOI: 10.3969/j.issn.1004-1524.20250709

• 未来食品与健康 • 上一篇    下一篇

融合魏斯氏菌协同发酵制备双蛋白酸奶及其稳定性研究

康颖(), 叶滔, 白雪莹, 张雪娇*()   

  1. 邵阳学院 食品与化学工程学院, 豆制品加工与安全控制湖南省重点实验室, 湖南 邵阳 422000
  • 收稿日期:2025-11-23 出版日期:2026-06-25 发布日期:2026-07-14
  • 作者简介:康颖,研究方向为豆制品加工及应用。E-mail:191722536@qq.com
  • 通讯作者: *张雪娇,E-mail:380711974@qq.com
  • 基金资助:
    邵阳学院研究生科研创新项目(CX2024SY021);湖南省自然科学基金(2022JJ50232);湖南省教育厅重点项目(21A0480)

Study on the preparation of dual-protein yogurt by co-fermentation with Weissella confusa and its storage stability

KANG Ying(), YE Tao, BAI Xueying, ZHANG Xuejiao*()   

  1. Hunan Provincial Key Laboratory of Soybean Products Processing and Safety Control, College of Food Science and Chemical Engineering, Shaoyang University, Shaoyang 422000, Hunan, China
  • Received:2025-11-23 Published:2026-06-25 Online:2026-07-14

摘要:

为制备质地稳定、口感适宜且营养丰富的动植物双蛋白酸奶,本研究首次利用高产葡聚糖的融合魏斯氏菌(Weissella confusa)SY628菌株协同商业酸奶发酵剂(YF-L904菌粉)对豆浆-牛奶混合体系共发酵,制备新型双蛋白酸奶,在单因素试验的基础上结合响应面法优化发酵工艺,并通过检测主要营养成分、理化性质、质构、流变特性、微观结构等指标,评估其在28 d储藏期间的品质稳定性。结果表明,双蛋白酸奶的最佳发酵工艺为:牛奶与豆浆配比6∶4,发酵温度30 ℃,菌液配比(SY628菌液与YF-L904菌液之比)1∶3,蔗糖添加量6%,菌液接种量3%。在此条件下,感官评分达88.67分。最佳发酵工艺下制得的双蛋白酸奶(SYF)的多糖含量为22.6 g·kg-1,显著(p<0.05)高于仅添加商业酸奶发酵剂制得的酸奶(CN)。在28 d的储藏期内,SYF显示出更高的硬度、内聚性、弹性等质地特性,更高的持水性,更高的储能模量、损耗模量和复黏度,拥有更致密的片层状凝胶结构,储藏稳定性更佳。本研究为开发零添加剂的功能性双蛋白酸奶提供了可行的技术方案,并拓展了融合魏斯氏菌在功能性发酵食品中的应用前景。

关键词: 融合魏斯氏菌(Weissella confusa), 双蛋白酸奶, 发酵工艺优化, 稳定性

Abstract:

To prepare a plant-animal dual-protein yogurt with stable texture, appropriate taste, and rich nutrition, this study for the first time utilized Weissella confusa SY628 strain (a high-yield dextran-producing strain) in combination with a commercial yogurt starter (YF-L904 compound bacterial powder) for the co-fermentation of a soymilk-milk mixed system to develop a novel dual-protein yogurt. Following single-factor experiments, response surface methodology was employed to optimize the fermentation conditions. The quality stability during 28 days of storage was evaluated by determining key nutritional components, physicochemical properties, texture profiles, rheological properties, and microstructure. The results showed that the optimal fermentation conditions were as follows: milk-to-soymilk ratio of 6∶4, fermentation temperature of 30 ℃, ratio of bacterial liquids (bacterial liquid of SY628 strain to bacterial liquid of YF-L904) of 1∶3, sucrose addition amount of 6%, and inoculum size of 3%. Under these conditions, a sensory score of 88.67 was achieved. The polysaccharide content of the dual-protein yogurt produced under the optimal fermentation conditions (SYF) was 22.6 g·kg-1, which was significantly (p<0.05) higher than that of the yogurt fermented solely with the commercial yogurt starter (CN). Throughout the 28-day storage period, SYF exhibited higher hardness, cohesiveness, and springiness in texture; better water-holding capacity; higher storage modulus, loss modulus, and complex viscosity; and a denser sheet-like gel structure. Consequently, SYF demonstrated enhanced storage stability compared with CN. This study provides a feasible technical solution for developing additive-free functional dual-protein yogurt and expands the application prospects of Weissella confusa in functional fermented foods.

Key words: Weissella confusa, dual protein yogurt, fermentation process optimization, stability

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