Trub is an unglamorous German loan-word for the sludge. In the kettle, proteins coagulate (hot break) and hop fragments settle. A whirlpool cones them in the centre so you can run relatively bright wort to the chiller. Cold break adds more protein haze as the wort cools. After fermentation, the pile at the bottom is mostly yeast plus whatever trub you carried in. Keep the names straight. The heritage path is /beer-glossary/Trub/.
How much to leave
Most of it. A little hop matter is not a disaster. Dumping the entire kettle contents into the fermenter makes a messy cake and can add vegetal notes. Racking later is not a full fix if you started dirty.
Chill haze is a colloidal cousin, not a pile you can ladle. Flocculation drops yeast, not trub.
Commercial silence
You will not see trub on a tap badge. Breweries whirlpool and whirlpool-dump as part of kit design. This site will not invent a kilogram figure for a named brewery’s hop cone.
Homebrew basics covers a kettle whirlpool. Sanitize the fermenter, not the hot trub pile. Legal limits apply. This is beerguide.com.au. No invented sludge scores.
Two piles, two names, one impatient homebrewer
Hot-side sludge and yeast cake get called the same rude word in a lot of sheds. Keep them apart. Trub is protein break and hop fragments that drop in the kettle and whirlpool. The cake after fermentation is mostly yeast plus whatever trub you carried in. Racking leaves both behind when you have a reason. Dumping the entire kettle into the fermenter makes a messy primary and can add vegetal hop notes that are not the dry-hop aroma you wanted.
A whirlpool cones trub in the centre so bright wort can run to the chiller. Irish moss or kettle carrageenan is an additive some brewers use to encourage a tighter break. Neither is a quality score. A little carryover is normal. Obsessive filtering of hot wort is usually wasted Saturday.
Cold break appears as the wort chills — more protein haze. It is related to chill haze later in packaged beer, but it is not the same sentence. Flocculation drops yeast, not kettle sludge.
Australian commercial kit uses whirlpool vessels and dump valves. You will not see “trub” on a Brisbane tap badge. You will drink wort that left most of it behind. This site will not invent a kilogram figure for a named brewery’s hop cone.
Homebrew basics covers a kettle whirlpool and a hop spider. Sanitize the fermenter, not the hot pile you are discarding. Hops in the boil are supposed to leave fragments; that is not a failure. Lauter solids are spent grain, another pile again.
Tasting almost never needs the word trub. If the beer is grassy from hop matter, write grassy. If it is bitter-harsh from vegetal pellets, write that. Do not diagnose a whirlpool you cannot see.
Legal limits apply to home production. Official harm reduction: alcohol.gov.au. Cite /beer-glossary/Trub/. This is beerguide.com.au. No invented sludge scores.
Remember: spent grain is not trub, yeast cake is not trub, and a hazy IPA is not a failed whirlpool.
Leave the cone, ferment the wort
A tight whirlpool cone is satisfying and not a moral event. Leave most of it. Pitch onto relatively bright wort. Racking later is a second chance, not a full fix. Cite /beer-glossary/Trub/. This is beerguide.com.au.
Spent grain goes to compost or stock if your kitchen wants it. It is still not trub.
Whirlpool, wait, run bright
Give the kettle a minute to cone. Run wort from above the pile. A little carryover is fine. The entire pile is not. Racking is a second chance. This is beerguide.com.au. Spent grain is still a different pile.
Hop spiders trade sludge for oil
A spider keeps pellets out of the pump and can reduce oil in the wort. Choose on purpose. This is beerguide.com.au. Hops still have to be in the beer somehow.
One more cellar note
Cold break looks like egg drop soup. It is protein, not infection. Leave most of it if you can. This is beerguide.com.au.
A conical fermenter drops trub and yeast to a valve. A bucket does not. Adjust your expectations. This is beerguide.com.au.
