Comparing Different Mashing Techniques RIMS vs. HERMS vs

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Presentation transcript:

Comparing Different Mashing Techniques RIMS vs. HERMS vs Comparing Different Mashing Techniques RIMS vs. HERMS vs. Single Infusion by: Harold J. Gulbransen & Bob MacKay

Is there a difference between HERMS & RIMS mashing? HERMS = heat exchange recirculating mash system RIMS = recirculating infusion mash system Advantages over single infusion mashing Clearer wort More precise temperature control Perform more complex mash schedules

Is there a difference between HERMS & RIMS mashing? Potential disadvantages Requires a pump so added cost Scorching the wort is possible with RIMS if the pump fails No scorching with HERMS as the wort never contacts direct heat

Controlling the Variables Brewed a Bock Bier to feature it’s malty character Same water profile – carbon filtered SD water Same malts Same sparging technique [batch sparge] Same mash tun, kettle and chiller Pitched same volume of yeast and feremented all beers in 10 gallon corny kegs [same geometry] and in the same chest freezer using a Johnson Controller

Recipe 6.0 gallons 32.5 IBU 75 min boil 18.7 SRM 54.2% Munich Malt 10L [Briess] 8.00 lbs 32.2% Pilsner Malt 2L [Briess] 4.75 lbs 6.8% Melanoidin 35oL 1.00 lbs 5.1% CaraMunich 0.75 lbs 1.7% Cafafa II 0.25 lbs Rice Hulls 1.0 lbs Carbon filtered SD water 22 qts [1.5 qts water/ 1 lb grain] Sparge 18 qts 170 F [acidified w/ Phosphoric acid] Hops: 25 gm Magnum 11.0% aa 60 min 25 gm Vanguard 4.7% aa 10 min Yeast: White Labs WLP 810 [SF Lager] – 200 ml of yeast slurry Fermentation temps: 50oF Packaging: kegged & force carbonated – Beer Gun to fill Bottles

Wort Aeration with Oxygen & a SS Aeration Stone

Next day: Single Infusion Mash Thanks to Patrick

Temperature control during fermentation

Fermentation in a chest freezer with a thermostat

Results: HERMS RIMS Single Infusion Pre-Boil Gravity 1.046 1.044 HERMS RIMS Single Infusion Pre-Boil Gravity 1.046 1.044 Pre-Boil Volume 8 gallons 8.4 gallons 8.1 gallons Volume after boil 6.5 gallons 6.6 gallons 6.7 gallons OG after boil 1.062 1.058 FG after feremntation 1.020 1.021

Evaluation of Head Retention Time = 0 min.

Evaluation of Head Retention Time = 2 min.

Evaluation of Head Retention Time = 3 min.

Evaluation of Head Retention Time = 8 min.

Evaluation of Head Retention Time = 20 min.

Evaluation of Head Retention Best to Worst: HERMS RIMS Single Infusion Mash Best Quality Head -RIMS – fine tan bubbles

Flavor Profiles JoAnne found HERMS the best tasting Slight metallic flavor with RIMS beer Single infusion had least body and was thinner than the other two. QUAFF Consensus? Let’s vote

Special Thanks to Bob MacKay Was this helpful to you when considering what Mashing technique you will employee in the future?