Spent brewery yeast leaves the fermentation tank as a slurry with only 8-12% solids — meaning 88-92% of its volume is recoverable beer. A yeast filter press recovers that beer at brew-grade quality while dewatering the yeast cake to 25-30% solids, ready for animal feed, yeast extract production, or composting.
Why Standard Centrifuges Don’t Win Here
Centrifuges work but they have three drawbacks for yeast: (1) shear damage breaks yeast cell walls, releasing intracellular protein into the beer and causing haze; (2) they require constant operator attention; (3) the dewatered cake is only 14-18% solids — too wet for direct animal-feed sale and expensive to dry further.
A modern yeast filter press uses low-pressure (3-6 bar) filtration through a fine polyester cloth (1-3 µm rating). Yeast cells stay intact, beer comes out cold and clear, and the membrane squeeze step drives cake moisture to 70-75% (i.e., 25-30% DS).
When to Use a Yeast Filter Press
Specify it when one of these conditions applies: brewery production above 50,000 hL/year (the economics break even there); craft brewery focused on beer recovery yield; any winery handling lees or grape pomace; or fermentation plant producing yeast extract for food/feed markets. For lower volumes, see general plate-and-frame presses in food-grade execution.
Common Applications
- Beer breweries — primary fermentation tank bottoms, lager yeast, top-fermented ale yeast
- Wine cellars — clarification lees, pomace pressing
- Distilleries — fermentation backset, dunder, distillery slop
- Yeast extract production — Marmite, Vegemite, and bouillon manufacturing
- Probiotic fermentation — lactobacillus, bifidobacterium harvesting
- Single-cell protein — yeast biomass for animal feed
For more on food and beverage filtration, see our food and beverage filter press applications.
Specifications & Customization Options
- Construction: Full 304L or 316L stainless steel, sanitary CIP-able
- Filter area: 10 – 150 m²
- Filtration pressure: 3-6 bar (low to protect cell integrity)
- Squeeze pressure: 8-12 bar membrane squeeze step
- Cloth options: Polypropylene 1-3 µm, polyester 5-10 µm food grade
- CIP/SIP automation: NaOH/HNO₃ cycle, optional steam sterilization to 121°C
- FDA / EU food-grade materials throughout
FAQs
How much beer do I recover? Typically 75-85% of the entrained beer is recovered at brew-room quality (1-2 NTU haze, normal pH and alcohol). Total annual yield gain at a 200,000 hL brewery is roughly $200-400K depending on recovery efficiency and beer brand value.
Does the yeast cake have value? Yes — at 28% DS, brewery yeast cake sells as cattle/swine feed at $30-80 per tonne wet. For yeast extract production, the same cake commands $400-1,000 per dry tonne.
How long is a typical cycle? 90-150 minutes total: 60-90 min filtration, 20-30 min squeeze, 10-30 min discharge and reset. Plan for 6-8 cycles per day in a well-run system.
Brewery or fermentation plant interested in yeast recovery? Contact Senjie with your annual production volume, current yeast handling, and target cake DS — we’ll spec a sanitary yeast filter press with CIP.