Rahr Technical Center Presents Results of Mill Setting Study
In April 2019, the Rahr Technical Center completed a study on mill settings for customers who purchase pre-milled malt from BSG. The study was first carried out in both lab and brewery settings, and ultimately in commercial brewery trials. Results indicate that – as expected – a finer grind potentially provides more extract yield; however this may not be beneficial to all breweries in overall terms.
Some key takeaways from the results:
- Brewery tests showed that tightening the mill settings from the equivalent of BSG’s standard spec (34/32) to a narrower setting (34/20) gave approximately 5-6% more brewhouse yield, but also extended the lautering time by more than 20 minutes per batch.
- The increase in extract yield is not necessarily all fermentable sugars.
- No significant difference was observed in the triangle sensory test between brewery wort samples from the two different mill settings.