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从原料预处理,原料处理,酒精发酵,醋酸发酵,原料后处理几个方面分析总结出提高原料淀粉利用率的几个要点:磨浆时粉浆业度达40目;原料处理糖化前调pH值为4.6-4.8;酒精发酵温度控制不高于36℃;醋酸发酵采用分罐发酵方式;后处理洗渣法回收醋泥中的残酸;淀粉利用率可达70%以上。 相似文献
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采用固态发酵方式培养黑曲霉,研究以啤酒糟为主要原料生产饲用木聚糖酶的最佳基质组分及其配比。结果表明,黑曲霉An54-2-1在啤酒糟/玉米芯/麸皮=6/2/2;NH4NO3 2%;Tween80 0.1%的基质上;以1:2加水;接入3.5%的孢子悬液;置30℃下培养65hr左右,产酶量可达6196.803IU/g。具有较好的应用前景。 相似文献
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0 前言目前 ,保健啤酒的研制通常采用添加方法 ,或是在原料中添加部分营养价值较高的杂粮 ,如黑米等 ,或在酿造时添加天然植物提取液 ,如银杏、绞股蓝、苦瓜等的提取液 ,或是在发酵结束后 ,添加一些功能因子 ,如低聚麦芽糖、低聚果糖等。1 保健啤酒的原料选择保健啤酒的基本原料仍为大麦汁和啤酒花。由于我国是啤酒生产大国 ,目前大麦啤酒花已基本实现集约化和标准化供应。大麦主要依靠进口 ,而啤酒花主要为定点生产 ,因此各厂家所用的大麦和酒花基本相同 ,而保健原料的选择则有较大区别 ,其酿造工艺也不同 ,使最终得到的啤酒具有独特的保… 相似文献
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保健啤酒新产品的开发 总被引:5,自引:2,他引:5
用食用酒精制成绞股蓝皂苷液,添加量按总皂苷量计,为4~6mg/L。可采用3种方法添加:在麦汁煮沸时与酒花一起加入到麦汁中;加入到清酒中搅匀;加入主发酵结束后的嫩啤酒中,制成绞股蓝保健啤酒。将黄瓜、西红柿、小白菜分另4制成蔬菜汁,可单独添加,也可混合添加制成蔬菜啤酒。(丹妮) 相似文献
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红枣不但具有丰富的营养,还具有很好的保健功能。采用红枣和大麦芽为原料研究保健型红枣啤酒的发酵工艺。试验结果可知:红枣在制备红枣原汁时,需要进行糖化。最佳的糖化工艺:糖化温度65℃、糖化酶的添加量为90U/g、糖化时间120min=红枣啤酒发酵过程中,最佳的发酵工艺为:红枣原汁添加量为12%,在主发酵时添加, 相似文献
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对液态深层发酵制醋工艺过程中问题的研究 总被引:8,自引:4,他引:8
由于原料的变化及工艺中采用了多种酶制剂,使得酒精发酵异常,并涉及到醋酸发酵,由于醋酸菌的培养与保藏问题而影响了醋酸发酵,通过本次系统试验,得出淀粉液化需采用三段液化法;用糖化酶制得的糖化液作酵母培养液时,应添加10%的麸曲水解液;醋酸菌的保藏应采用液体保藏,在其发酵液中添加2%的CaCO3的结论。半连续醋酸发酵的应用,使上罐率提高34%,产量提高40%。 相似文献
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山药啤酒的研制 总被引:1,自引:0,他引:1
以山药、麦芽为原料,酶法糖化制汁,接种啤酒酵母发酵研制了山药啤酒。将新鲜山药制备成山药粉,与麦芽在复合酶的作用下糖化制汁。采用正交试验设计研究复合酶的添加量、添加阶段、作用时间、山药粉添加量对山药、麦芽mix中还原糖量、α-氨基氮含量的影响。结果表明,酶法制备山药、麦芽混合汁的最佳工艺条件为酶的添加量0.36%,添加阶段45℃,作用时间17min,山药粉添加量35%。于此工艺下制备的山药、麦芽混合汁经酵母菌代谢后,高级醇含量为55.8mg/L,双乙酰0.06mg/L,酒精度3.91%(W/W),真正发酵度66.4%。酿制的啤酒不仅具有大麦芽啤酒的风味,并且还富含了山药中多种氨基酸和抗癌物质,不失为一种较好的功能性饮品。 相似文献
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锌离子在啤酒酿造中的作用与控制 总被引:1,自引:0,他引:1
啤酒中锌离子来源于麦芽、大米、酿造用水、酒花。Zn^2 在啤酒酿造过程中可起到催化荆作用,与氨基酸结合形成Zn-氨基酸螯合物。在啤酒酿造过程中,可激活酶提高酶的作用;促进糖化、发酵;促进蛋白质合成及其稳定性;缓解某金属离子的毒性作用,促进挥发物质的产生和双乙酰的还原,缩短发酵时间,提高啤酒质量;但含量过量会使啤酒非生物稳定性降低,影响啤酒质量。通过对糖化过程和发酵过程的控制,可降低醪液pH值。加入少量小麦芽,加入适量ZnCl2,ZnSO4及酵母营养盐等,可实现对Zn^2 的有效控制,达到最佳酿造浓度。 相似文献
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Edyta Kordialik‐Bogacka Paulina Bogdan Katarzyna Pielech‐Przybylska Dorota Michałowska 《Journal of the science of food and agriculture》2018,98(13):5027-5036
BACKGROUND
This study provides the first detailed investigation into the effect of partially substituting barley malt with quinoa (Chenopodium quinoa Willd.) on the characteristics of wort and beer. Quinoa seeds and flakes were compared in terms of their suitability for brewing. The benefits of applying a commercial enzyme mixture during beer production with quinoa were also investigated.RESULTS
These findings show that quinoa is a good starchy raw material for brewing. Even without exogenous enzymes, it is possible to substitute barley malt with up to 30% quinoa. The form in which quinoa is used has a negligible influence on the quality of the wort and beer. The foam stability of beer made with quinoa was better than that of all‐malt beer, despite there being a lower level of soluble nitrogen in quinoa beer in comparison with all‐malt beer and more than twice the amount of fat in quinoa in comparison to barley malt.CONCLUSION
The addition of unmalted quinoa does not give unpleasant characteristics to the beer and was even found to have a positive effect on its overall sensory quality. This offers brewers an opportunity to develop good beers with new sensory characteristics. © 2018 Society of Chemical Industry 相似文献16.
John R. N. Taylor Heather K. Boyd 《Journal of the science of food and agriculture》1986,37(11):1109-1117
Free α-amino nitrogen (FAN) is an essential nutrient for yeast growth during fermentation. Under normal conditions of sorghum beer mashing, 60°C at pH 4.0, production of FAN by proteolysis accounts for approximately 30% of wort FAN, the remaining 70% being preformed in the malt and adjunct. The quality of the FAN in sorghum beer worts is good as it does not contain a high percentage of proline. Optimum conditions for FAN production during mashing are 51°C and pH 4.6. Wort FAN was increased proportionally by raising the ratio of sorghum malt to adjunct and conversely decreased by raising the ratio of adjunct to malt. FAN was also increased by the addition to the mash of a microbial proteolytic enzyme. Wort FAN is directly proportional to malt FAN. 相似文献
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A. C. Ogbonna 《Journal of the Institute of Brewing》2011,117(3):394-400
Initially, large‐scale lager beer brewing with sorghum malts proved highly intractable due to a number of biochemical problems including: high malting losses estimated at 10–30% as against 8–10% for barley; high gelatinisation temperatures which limited starch solubilisation/ hydrolysis by the amylolytic enzymes during mashing; low extract yield/low diastatic power (DP) due to inadequate hydrolytic enzyme activities especially β‐amylase; low free α‐amino nitrogen (FAN) due to inadequate proteolysis limiting yeast growth during fermentation; high wort viscosities/beer filtration problems due to low endo‐β‐1,3; 1–4‐glucanase activities on the endosperm cell walls causing the release of some β‐glucans. Strident research efforts using improved Nigerian sorghum malt varieties (SK5912, KSV8 and ICSV400) have reported some encouraging results. The knowledge of the biochemical integrity of the endo‐β‐glucanases of the sorghum malt is helping to elucidate their mode of activity in the depolymerisation of the β‐glucans. This is bound to ensure process efficiency in sorghum beer brewing, reduce beer production costs and ultimately, produce a Pilsner‐type of lager beer with 100% sorghum malt. 相似文献
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应用糖浆高浓酿造啤酒的工艺浅析 总被引:1,自引:0,他引:1
高浓酿造啤酒起源于20世纪70年代美国和加拿大,现已遍及欧美啤酒行业。其优点有:(1)提高糖化和发酵设备利用率,节省投资;(2)降低能耗和成本;(3)提高糖分的转化率;(4)提高啤酒非生物稳定性和质量;(5)可添加稀释水、麦芽提取物、酒花萃取物及糖浆生产多类型产品,灵活性较大。缺点有:(1)酒花利用率低;(2)起泡性和稳定性下降;(3)对啤酒酵母有不利影响;(4)发酵时间延长;(5)对水质要求严格;(6)需调整原料、糖化工艺和发酵工艺;(7)长期生产需专门的糖浆贮存设备和糖浆添加泵;(8)不宜酿造浓醇型啤酒。 相似文献