用β-分布测量啤酒酵母的浓度和活性  

Measuring Concentration and Viability of Beer Yeast by β-Dispersion

作　　者：王贻俊[1] 樊育[1] HansH 

机构地区：[1]山东轻工业学院机电工程系,济南250100 [2]丹麦嘉士伯啤酒技术研究中心

出　　处：《山东轻工业学院学报（自然科学版）》1999年第3期49-54,共6页Journal of Shandong Polytechnic University

基　　金：山东省教委科技发展计划

摘　　要：酵母的存在会改变发酵液的电特性，发酵液在无线电频率范围内的电特性可用电容率和电导率充分地描述。实验证实发酵液在无线电频率范围内的电容率增量是测量频率和生物量浓度的函数。基于对发酵液电容率分布的研究，本文提出了测量酵母浓度的新方法。用本方法不用取样就能对发酵液中的酵母浓度进行实时在线测量，而且测得的是活的酵母浓度。This paper concerns a device and a method which monitor yeast concentrations on-line and in-situ in a fermentation process.The presence of microbial cells would affect the dielectrical properties of microbial suspensions.At radio-frequencies,the intrinsic passive electrical proerties of cell suspensions are completely secified by its conductivity and permittivity.At radio-frequencies the dielectric permttivity of cell suspensions is monotonic function of the measuring frequency and cell density.Based on this understanding a new method for measuring biomass concentration is proposed.Using this method the biomass concentrations are measured on-line and in-situ without taking samples from the bioreactor and only viable cells are detected.

关 键 词：实时在线测量 啤酒酵母 浓度 活性 Β-分布 测定 

分 类 号：TS262.5[轻工技术与工程—发酵工程] TS261.11[轻工技术与工程—食品科学与工程]