title: Evaluation of emerging factors blocking filtration of high-adjunct-ratio wort.
abstract: Corn starch has become a common adjunct for beer brewing in Chinese breweries. However, with increasing ratio of corn starch, problems like poor wort filtration performance arise, which will decrease production capacity of breweries. To solve this problem, factors affecting wort filtration were evaluated, such as the size of corn starch particle, special yellow floats formed during liquefaction of corn starch, and residual substance after liquefaction. The effects of different enzyme preparations including β-amylase and β-glucanase on filtration rate were also evaluated. The results indicate that the emerging yellow floats do not severely block filtration, while the fine and uniform-shape corn starch particle and its incompletely hydrolyzed residue after liquefaction are responsible for filtration blocking. Application of β-amylase preparation increased the filtration rate of liquefied corn starch. This study is useful for our insight into the filtration blocking problem arising in the process of high-adjunct-ratio beer brewing and also provides a feasible solution using enzyme preparations.
authors.affiliation: Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, and ‡The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University , Wuxi 214122, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Ma
authors.forename: Linjiang
authors.initials: L
authors.lastname: Zhu
authors.forename: Feiyun
authors.initials: F
authors.lastname: Zheng
authors.forename: Yongxian
authors.initials: Y
authors.lastname: Li
authors.forename: Qi
authors.initials: Q
authors.lastname: Li
mesh_terms: D001515:Beer / Q000032:analysis*; D005374:Filtration / Q000295:instrumentation / Q000379:methods*; D005511:Food Handling / Q000295:instrumentation / Q000379:methods*; D006868:Hydrolysis; D013213:Starch / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D013213:Starch
keywords: beer brewing; corn starch; filtration blocking; high-adjunct-ratio brewing; wort filtration