Mash/Lauter Tun Design and Construction Choices for Homebrewers
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Transcript of Mash/Lauter Tun Design and Construction Choices for Homebrewers
![Page 1: Mash/Lauter Tun Design and Construction Choices for Homebrewers](https://reader036.fdocuments.net/reader036/viewer/2022062304/56812e44550346895d93d248/html5/thumbnails/1.jpg)
Mash/Lauter Tun Design and Construction Choices
for Homebrewers
By Cole Davisson
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MashTun vs. Lauter Tun
• Mash Tun- A brewing vessel designed to hold a mash at a constant or increasing temperature
• Lauter Tun- A brewing vessel designed to filter wort from spent grains of a mash after conversion
• Homebrewers commonly use a dual-purpose mash/lauter vessel
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Mashing Mechanisms
• Single Temperature Infusion• Step Mash– Multiple Infusions– Decoction– Applied heat
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Vessel Requirements
• Needs to hold an appropriate amount of liquid• Aspect ratio and volume will determine depth
of grain bed• Needs to be able to maintain temperature
over the period of a rest
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Some Common Vessel Choices
• Food-grade Plastic Buckets
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Some Common Vessel Choices
• Insulated Bucket
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Cylindrical Coolers
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Rectangular Coolers
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Converted Kegs
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Kettle-based Mash Tuns
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Purpose-built Mash Vessels
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Less Popular Choices…
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Lautering Mechanism
• Strainer•Requires scooping of hot mash from mash tun into strainer
•Many brewers are concerned about the effects of ‘Hot-side Aeration’
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Lautering Mechanism
• Bucket-in-a-bucket
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Lautering Mechanism
• Purpose-built False Bottom– Plastic or metal– Hinged– Legs or Domed– Outlet above or below
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False Bottoms
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False Bottoms
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Manifolds
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Manifolds
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Metal Hose Braid
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Metal Hose Braid
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Sources for Metal Braid
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Sparging
• No Sparge• Batch Sparge• Fly Sparge (or Continuous Sparge)
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No Sparge
• Calculate strike water volume and gravity of extract expected.
• Mash• Drain off high-gravity wort• Top off to reach final, pre-boil volume
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Lautering Considerations
• Because you are draining the mash tun completely in one step, the choice of lautering technology is not particularly critical.
• So long as you don’t have dry patches in your grainbed, false bottom, manifold or braid should all perform equally well.
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Batch Sparge
• Mash• Drain off high-gravity wort until dry• Add hot sparge water and stir to combine• Drain off lower-gravity wort until dry• Repeat until satisfied…
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Lautering Considerations
• The sparge operation is a diffusion process, rather than a rinsing process.
• Like with No Sparge, all of the wort is drained in one step.
• Like with No Sparge, any of the lautering choices should work equally well.
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Last note on batch sparging
• substantial amount of sugar is present and diffuses into sparge water in the last sparge operation
• pH of sparge water never rises to the level that husk tannins are extracted
• ‘impossible to oversparge’
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Fly Sparge
• Continuously rinsing the grain bed to extract as much sugar from the grain as practical
• Slow sparging can take up to an hour• Many brewers do a mashout to denature
enzymes to combat further conversion during sparge
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Fly Sparge
• Water is added uniformly across the top of the grain bed, at the same rate as wort is run off
• As sparge water trickles down through filter bed, it rinses away interstitial sugars
• Wort drawn continuously off the bottom of the grain filter bed
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Lautering Considerations
• Sparge water must be uniformly distributed across top of grainbed
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Lautering Considerations
• Uniform distribution of sparge water and uniform distributed collection discourage channeling
• Because water flows through the path of least resistance, if channels form, sparge will not collect sugar from other portions of grain bed
• Efficiency will suffer• Most breweries use false bottom and sparge
arm
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Show and Tell