乳业科学与技术 ›› 2023, Vol. 46 ›› Issue (5): 16-21.DOI: 10.7506/rykxyjs1671-5187-20231110-054
王吉栋,郑远荣,刘振民
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摘要: 系统地分析不同二次均质压力对经过超高温瞬时杀菌(ultra-high temperature instantaneous sterilization,UHT)处理后的搅打稀奶油品质的影响。结果表明,在4~8 MPa压力条件下对稀奶油进行二次均质可使乳液粒径向小颗粒方向偏移,并同时增加表观黏度,从而提高乳液稳定性。然而,过高的均质压力会导致乳液内部出现脂肪聚结现象,影响稀奶油的表观黏度和泡沫稳定性。随着二次均质压力的增大,稀奶油出现打发时间延长,打发率、泡沫稳定性下降以及泡沫硬度降低等问题,甚至在12 MPa时已无法打发成型。因此建议将二次均质压力控制在4~6 MPa。
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