Research Progress of Premature Yeast Flocculation in Beer

Abstract:

Premature yeast flocculation(PYF) is a periodic occurrence phenomenon in beer brewing. The mechanism of PYF and the nature of the PYF factors have not been clearly confirmed,because of complex influence factors,which bothered the entire chain of beer brewing. In recent years,PYF has relatively increased with the advent of environment pollution and bad weather which could lead to this phenomenon. Finally,brewing industries including the maltsters and brewers suffer a serious economic loss and a damaged reputation. In this paper,the research progresses of PYF both in domestic and abroad was reviewed,including the hypothesis of mechanism,the origin and the form mechanism of PYF factors,and the control methods of PYF,with the objective to provide a thought and effective methods to solve this problem in brewing industry chain.