Öseen
Women & Scientist-Led Biotech Innovation

From beer to bread. The future of food isn't just grown, it's upcycled.

Brewery side-streams, rewritten by fungi into high-value ingredients.

Our proprietary fungal fermentation platform converts spent grain and brewery process water into scalable, clean-label functional ingredients — protein isolates, fibres and bioactives — with food-grade purity and industrial throughput.

Explore The Tech Request Sample / Data
85%
Of brewery by-products are spent grain
~20 kg
Spent grain per 100 L of beer
39 Mt
Generated worldwide each year
Bread baked with upcycled ingredients next to bowls of fermented spent grain

Upcycling loop

Circular
  1. Brewer's spent grainSpent grain input01
  2. Fermentation02
  3. Functional protein isolateOutput · protein & fibre03

The mechanics

A linear waste stream, closed into a value loop.

Breweries generate 20 kg of spent grain per hectolitre of beer. We treat it as a precision substrate, not a disposal problem.

  1. Step 01

    Brewery sidestreams

    Spent grain and nutrient-dense process water are collected on-site, stabilised and characterised — feedstock that today is landfilled or sold as low-value feed.

    • Wet spent grain
    • Process wastewater
  2. Step 02

    Proprietary fermentation

    Selected filamentous fungal strains digest residual carbohydrates in a controlled ferment, restructuring the substrate into targeted biomass fractions.

    • Strain library
    • Closed-loop water reuse
  3. Step 03

    Upcycled bio-ingredients

    Downstream separation delivers food-grade protein isolates, soluble fibre and bioactive fractions with consistent, spec-sheet-backed functionality.

    • Protein isolate
    • Soluble fibre
    • Bioactive extracts

85%

Of all brewery by-products are spent grain

~20 kg

Spent grain per 100 L of beer brewed

39 Mt

Spent grain generated worldwide each year

Zero

Waste bioprocess by design

Delicious in

Real recipes, upcycled from the first crumb.

Granola, pancakes and waffles baked with our fermented spent grain flour — without compromising taste, texture or appearance.

Granola clusters baked with upcycled fermented spent grain
Granola
Pancakes made with upcycled spent grain flour, served with blueberries
Pancakes
Waffle made with upcycled spent grain flour
Waffle

Our ingredients

Circular bioeconomy

Feedstock is sourced within a 50 km radius of each production site, water is recirculated, and residual biomass returns to soil amendment — no side-stream leaves the loop.

Scalable fermentation

Standard food-grade fermentation, validated from bench trays to pilot scale. Deployable in existing food-grade contract manufacturing capacity.

Clean-label, high-yield

No solvents, no synthetic additives. Ingredients declare simply and match functional benchmarks for gelation and emulsification.

Ecosystem

Supported by leaders in science & innovation

Backing our vision from lab bench to industrial scale.

Prototron — Grants & Funding
Sparkup Deeptech — Grants & Funding
The city of Tartu — Grants & Funding
Enterprise Estonia — Grants & Funding
Estonian University of Life Sciences — Research Universities
Taltech — Research Universities
University of Tartu — Research Universities
Prototron — AcceleratorsDeeptech — AcceleratorsEIT Food Network — Accelerators
Public support
Estonian Business and Innovation Agency

Estonian Business and Innovation Agency (former Enterprise Estonia, EAS) supports Öseen tech OÜ with an Innovation Grant 5846.

Projekti number: 22021-2027.1.01.26-1624

Our team

Pioneered by scientists. Built for impact.

A women-led team combining materials science, regulatory insight and product growth. We use fungal conversion to turn brewery side-streams into clean, high-value ingredients — and scale what we can prove in the lab.

  • Deep expertise in fungal conversion and regulatory pathways
  • Science-led approach validated at lab and pilot scale

Liisi Tampere

Co-Founder & CEO

Kaisa Aab

Co-Founder & Head of Product & Growth

Leelo Haav

Co-Founder & COO

Our values

What guides every batch we ferment

As a women- and scientist-led company, these principles shape how we work with partners, side-streams and each other.

Circularity first

Every stream has value. We design processes that keep nutrients in the loop and out of the drain.

Science-led decisions

From strain selection to scale-up, our choices are grounded in data, lab work and honest measurement.

Low impact by default

We build on side-streams, not virgin crops — cutting land use, water demand and emissions from day one.

Open collaboration

We grow together with breweries, researchers and industry partners — sharing knowledge as we scale.

Talk to us

Curious about collaboration?

Whether you brew, formulate or fund — drop us a line below or reach us directly.

We reply within two business days. No marketing lists.