While brewers tend to focus heavily on the brewing process and fermentation, a lot of a beer’s flavor comes from decisions you make before you can even start brewing. The choice of grains in a beer composition gives it most of its flavor, so its really important to know what certain grains will do to change the way beer tastes. We’ll explore how the grain bill affects beer flavor here to give you more insight when conceptualizing new brews.

Control fill time At the end of the first wort wash, wort replenishment should start as soon as possible, because the grain bed is barely visible. If it is premature more essence will definitely remain in the grain bed. If it is too late, the sintering time will definitely be extended, increasing the threat of oxidation.

​Polyphenols in beer mainly come from barley and hops. About 80% of them come from barley and 20% from hops. The phenols in barley are about 0.1% ～ 0.3% of its dry weight, mainly distributed in wheat husk, aleurone layer and endosperm. With the dissolution of malt in the process of malting, it is free and brought into wort and beer through the saccharification process. Phenolic substances in hops account for 4%~10% of the dry matter, mainly distributed in the bracts and rachis of hops.

In the saccharification process, the first stage after the malt feeding is the protein resting process. The time of this process can vary between 0 and 90 minutes. It decomposes the macromolecular proteins present in the malt to meet the needs of beer brewing and beer quality for medium and low molecular nitrogen content.