摘要
为推进国产中空纤维膜技术在啤酒过滤领域的应用,促进啤酒品质的提高,该研究采用以亲水性聚醚砜为基材的中空纤维膜对啤酒发酵液进行过滤,探究不同规格中空纤维膜对膜过滤通量与发酵液质量指标(酵母数、浊度、原麦汁浓度、酒精度)变化的影响,并对膜清洗与循环使用性能进行研究。结果表明,当聚醚砜中空纤维膜孔直径≥0.45μm,膜内径为1.5 mm时,滤液中无酵母细胞检出,浊度显著降低,原麦汁浓度与酒精度损失率较低,分别为0.7%、1.5%~2.0%,孔径为0.45μm的聚醚砜中空纤维膜过滤100 min时膜通量接近302 L/(m^(2)·h·bar)。采用反向水冲洗与碱液浸泡5 min的方法可获得较好的膜清洗效果,循环次数达到9次后,膜通量仍可得到较好的恢复效果(膜通量8000 L/(m^(2)·h·bar)),表明该中空纤维膜具有良好的循环性能,适合长时间使用。
In order to promote the application of domestic hollow fiber membrane technology in the field of beer filtration and promote the improvement of beer quality,in this study,the beer fermentation broth was filtered using a hollow fiber membrane based on hydrophilic polyethersulfone as the substrate,and the effects of different specifications of hollow fiber membrane on the changes of membrane filtration flux and fermentation broth quality indexes(yeast count,turbidity,original wort concentration,alcohol content)were explored,and the cleaning and recycling performance of the membrane were studied.The results showed that when the pore diameter of the polyether sulfone hollow fiber membrane was not less than 0.45μm and the inner diameter of the membrane was 1.5 mm,no yeast cells were detected in the filtrate,the turbidity was significantly reduced,and the loss rates of original wort concentration and alcohol content were relatively low,being 0.7%and 1.5%-2.0%,respectively.When the polyether sulfone hollow fiber membrane with a pore size of 0.45μm was filtered for 100 min,the membrane flux was close to 302 L/(m^(2)·h·bar).The reverse water rinsing and lye immersion for 5 min could obtain a good membrane cleaning effect,and the membrane flux could still be restored after 9 cycles(membrane flux of 8000 L/(m^(2)·h·bar)),indicating that the hollow fiber membrane had good cycling performance and was suitable for long-term use.
作者
楼雷鸣
贾继楷
孙洁
叶卉
钟俊辉
张磊
刘鹏
冯忠厚
LOU Leiming;JIA Jikai;SUN Jie;YE Hui;ZHONG Junhui;ZAHNG Lei;LIU Peng;FENG Zhonghou(China Resources Snow Beer(China)Co.,Ltd.,Beijing 100005,China;School of Material Science and Engineering,Tianjin Polytechnic University,Tianjin 300387,China;UNiCORE Membrane Science and Technology(Tianjin)Co.,Ltd.,Tianjin 300385,China)
出处
《中国酿造》
北大核心
2025年第7期189-194,共6页
China Brewing
关键词
膜分离
啤酒过滤
中空纤维膜
聚醚砜
membrane separation
beer filtration
hollow fiber membrane
polyether sulfone
