An Experiment in Brewology – Beer Yeast


It’s been a long while since I have last done an experiment in home brewing and this is one I have been planning on doing for a long time. The lack of small 1 gallon fermentation units and the terrible state of the local home brew suppliers in my city have prevented me from attempting this.

Last week I found a decent online store which supplied several strains of dry beer yeast, plus a variety of well priced hops and managed to convert several 1 gallon apple juice containers into fermenters. The yeast arrived at my house last night and the rest will be history. Until now I have exculsively used Coopers beer yeast which has served me very well in producing beer. Still from my reading and research many state that the strain of yeast plays a very large role in the overall final product. I have to find out for myself…

The Question – How much does the strain of yeast affect the final flavours of a home brewed beer?

The Experiment -4 Different strains of yeast will be used for a single beer recipe which will be divided into four seperate 1 gallon fermenters.

The Recipe -Bradinator’s Red Ale

All the ingredients collected and ready to go

  • 3.3 lbs Pilsner LME
  • 1.0 lbs Light DME
  • 1 and 1/2 cups (approx 0.5 lbs) Crystal Malt 60L (steeped for 30 minutes at 70-80c)
  • 1 oz Amarillo Gold @ 60 minutes
  • 0.5 oz Amarillo Gold @ 30 minutes
  • 0.5 oz Amarillo Gold @ 5 minutes
  • 1/2 tsp Irish Moss @ 10 minutes
  • 1/2 tsp Yeast Nutrient @ Cold Break
  • SafeAle-04, SafeAle-05, SafeLager S-23, SafeBrew S-33

Original Gravity: 1.038 – 1.040

The Plan – 4-6 weeks in the fermenters, then an additional 2 weeks in bottles. The final products will be refridgerated for 24 hours prior to drinking and will be sampled on an individual basis (possibly 1 a night). A final gravity reading will be taken from each individual batch as I highly expect them all ferment out differently, especially the S-33.

All the beer was divided evenly and each individual yeast packet pitched.

SafeAle S-04: Described as an English Ale yeast

SafeAle S-05 - An American ale yeast, low diacetyl production

SafeLager S-23 - A german lager yeast, supposed to impart fruit like flavours

SafeBrew S-33: A robust ale yeast with high alcohol tolerance. Used in strong ales.

I am going to need to monitor this brews over the next couple days as I pitched the entire 11.5g packet of yeast into these small fermenters. To prevent the inevitable blow out that will occur in the next day or so I have all the beers pointing into a blow-off jar filled with sanitizer.

I already know this beer will explode... It's just a matter of time.

  1. No comments yet.
(will not be published)