共查询到19条相似文献,搜索用时 250 毫秒
1.
2.
固定化酵母细胞啤酒连续后发酵工艺条件的优化 总被引:5,自引:0,他引:5
将陶瓷拉西环固定化酵母细胞应用于啤酒的连续后发酵。用试验和分析数据得到了最佳工艺参数。试验结果表明:优化的工艺条件为发酵温度13~14℃,稀释率0.110h-1,后发酵时间可大为缩短。此外,啤酒的主要理化指标还揭示:采用固定化酵母细胞进行后发酵的新工艺不会影响啤酒的品质。 相似文献
3.
将蜂窝陶瓷用作酵母细胞固定化的载体,进行啤酒连续后发酵试验研究。应用均匀试验设计法来安排试验.对试验数据进行统计分析及最优化处理,并通过验证试验,获得优化的工艺条件为:发酵温度13~14℃,稀释率0.142h^-1。啤酒主要理化指标的测定和口味品评结果表明:与传统工艺相比,采用蜂窝陶瓷固定化酵母细胞啤酒连续后发酵工艺不会影响啤酒的品质,而后发酵时间可大为缩短。 相似文献
4.
5.
6.
泡沫陶瓷固定化酵母细胞啤酒连续主发酵工艺 总被引:1,自引:0,他引:1
采用泡沫陶瓷固定化酵母细胞,并对其应用于啤酒连续主发酵进行了实验研究,获取了优化的工艺条件:发酵温度16℃,稀释率0.044h-1。在此工艺条件下,实际测得浓度降低为7.09%,嫩啤酒双乙酰含量为0.144mg/L。嫩啤酒主要理化指标的测定结果表明:采用固定化酵母细胞啤酒主发酵工艺不会对啤酒质量造成影响。 相似文献
7.
8.
探讨了固定化啤酒酵母在鼠曲草啤酒中的应用,采用正交试验确定了固定化酵母的最佳条件和鼠曲草啤酒的发酵工艺条件。固定化酵母细胞的最佳条件为海藻酸钠浓度为6%,氯化钙浓度为0.5%,固化时间为1h;鼠曲草啤酒的发酵工艺为主发酵前添加3.0%的鼠曲草提取液,发酵时间为8d。 相似文献
9.
该文对采用固定化细胞多菌种进行酒精和醋酸的双轮发酵生产保健红醋的工艺进行了研究。第1阶段发酵以德氏根霉、酿酒酵母与产香酵母共固定化细胞对大米原料进行糖化和酒精发酵。结果表明,根霉与酿酒酵母、产香酵母共固定化细胞的最佳菌种量配比为4:3:2;固定化细胞粒子接入量为10%;第1阶段糖化及酒精发酵的最适温度为30℃~33℃,发酵时间为70h。 相似文献
10.
11.
12.
以啤酒酵母S-6为实验菌株,研究了主发酵温度和原麦汁浓度对啤酒发酵的残糖、酒精度、风味物质和絮凝性等性能指标的影响。结果表明,原麦汁浓度一定时,主发酵温度对高级醇和乙酸酯的含量影响较大,主发酵温度由10 ℃提高至16 ℃时,高级醇含量提高了10%~20%,乙酸酯含量提高了8%~16%,但CO2累积质量损失、残糖、酒精度和絮凝性基本不受温度的影响;主发酵温度一定时,原麦汁浓度对酵母絮凝性影响较大,原麦汁浓度越高,酵母絮凝性越低,将高浓(18 °Bx)发酵液稀释50%至常浓(12 °Bx),残糖、酒精度和高级醇的含量与常浓发酵液基本相同。该研究为选育高温高浓发酵低产高级醇同时强絮凝性酵母菌株提供了重要依据。 相似文献
13.
14.
Eduardo J. Pires José A. Teixeira Tomás Brányik António A. Vicente 《Journal of the Institute of Brewing》2014,120(4):500-506
Developing a sustainable continuous fermentation reactor is one of the most ambitious tasks in brewing science, but it could bring great benefits regarding volumetric productivity to modern breweries. Immobilized cell technology is often applied to reach the large densities of yeast needed in a continuous fermentation process. However, the financial cost associated with the use of carriers for yeast immobilization is one of the major drawbacks in the technology. This work suggests that yeast flocculation could address biomass immobilization in a gas‐lift reactor for the continuous primary fermentation of beer. Nearly 25 g dry wt L?1 of yeast was flocculated in the reactor before interruption of the fermentation. Stable sugar consumption and ethanol production (4.5% alcohol by volume) from an 11°P wort was evidenced. The key esters and higher alcohols measured in the young beer met the standards of a finished primary beer fermentation. Copyright © 2014 The Institute of Brewing & Distilling 相似文献
15.
以皮尔森麦芽、特种麦芽和酒花为原料,选用上面艾尔酵母BE-256经二次发酵,酿制高酒精度的修道院强烈艾尔啤酒。 以感 官评分为评价指标,通过单因素试验研究发酵温度、加糖量及酒花干投量对啤酒感官品质的影响,在此基础上以感官评分为响应值, 建立响应面模型优化啤酒酿造的工艺条件。 结果表明,修道院强烈艾尔啤酒的最佳酿造工艺条件为发酵温度20 ℃,加糖量3.04%,酒 花干投量0.42 g/L。 在此优化条件下,啤酒的感官评分为92.8分,外观呈琥珀色,泡沫丰富细腻,香气宜人,酒体醇厚,杀口力强。 相似文献
16.
17.
P. H. Pilkington A. Margaritis N. A. Mensour I. Russell 《Journal of the Institute of Brewing》1998,104(1):19-31
Recent fundamental research conducted on immobilised cells with a focus on continuous primary beer fermentation is presented in this review. The knowledge of whole-cell immobilisation, continuous fermentation, yeast biochemistry associated with beer flavour production, and bioreactor engineering design is required to apply immobilised yeast cells for industrial scale beer production. Understanding how immobilisation and continuous bioreactor operation affect yeast cell metabolism and viability will provide the groundwork for optimising beer quality. The latest studies on immobilised cell carriers, viability, vitality, mass transfer characteristics and bioreactor design indicate that an industrial scale immobilised cell system for primary beer fermentation may soon be a reality in the modern brewery . 相似文献
18.
Michal Kuřec Martin Baszczyňski Radek Lehnert André Mota José A. Teixeira Tomáš Brányik 《Journal of the Institute of Brewing》2009,115(3):253-258
An expeditious method of yeast age estimation was developed based on selective bud scar staining (Alexa Fluor 488‐labelled wheat‐germ agglutinin) and subsequent fluorescence intensity measurement by flow cytometry. The calibration curve resulting from the cytometric determination of average bud scar fluorescence intensities vs. microscopically counted average bud scar numbers of the same cell populations showed a good correlation and allowed routine cell age estimation by flow cytometry. The developed method was applied for yeast age control in traditional batch and continuous beer fermentations. At the pitching rates used in industrial beer fermentations, our results support former findings by locating a gradient of increasing yeast age from the top to the bottom zone of the fermenter cone. The results also indicate that in continuous beer fermentation, the increasing bud scar fluorescence of immobilized cells could help to schedule the replacement of aged biomass, prior to loss of viability or deterioration of process performance and product quality. 相似文献
19.
本文研究了在不同温度和压力条件下不同酵母菌株的发酵状况。业已筛选出能适于高温加压下进行发酵的最适菌株。探讨了发酵温度和压力对浸出物浓度、酵母生长、糖、α-氨基酸、pH、色度、苦味物质等及对发酵副产物形成的影响。对在高温和加压力下的啤酒发酵的工艺条件进行研究。介绍了其最适的工艺条件。质量分析的结果表明,采用上述工艺条件所酿制的啤酒与传统发酵方法所酿制的啤酒无显著差别。采用高温和加压发酵的工艺,可使发酵时间缩短65%左右,从而大大提高了生产能力。 相似文献