Upcycled food ingredients

01Overview and value chain

Markers: [EC: EU Circular Economy Action Plan + Waste Framework Directive | OECD: Food systems, Circular bioeconomy | Regulator: FDA (USA), EFSA (EU), MARA (CN)]

Upcycled food ingredients are functional proteins, fibres and lipids recovered from agricultural and food-industry side streams — okara, brewer’s spent grain and yeast, oat and almond pulp, imperfect produce, spent coffee grounds — and upgraded back to human-food value rather than being composted, digested to biogas or fed to animals. Roughly one-third of all food produced is lost or wasted each year, driving an estimated 8–10 percent of global greenhouse-gas emissions, which makes side-stream valorisation one of the highest-leverage moves in a circular bioeconomy. Biotech processing — enzymatic hydrolysis, solid-state fermentation, membrane fractionation and gentle low-temperature drying — turns these streams into ingredients that replace costly protein isolates, egg white and texturisers across bakery, confectionery, plant-based meat and beverage formulations. The category has crossed into mainstream retail: the Upcycled Certified standard requires at least 10 percent verified upcycled content, and the United States has set a national goal to halve food waste by 2030.

The key directions of upcycled food ingredients are:

1. Enzymatic protein hydrolysis: controlled endo- and exo-protease cleavage of okara or yeast proteins to unlock emulsifying, foaming and gelling function, lifting okara’s emulsifying capacity several-fold.
2. Solid-state fermentation: growing Aspergillus oryzae or culinary-mushroom mycelium on side streams to remove off-flavours and build functional protein and beta-glucan.
3. Membrane fractionation: tangential-flow ultrafiltration that concentrates protein past 65 percent while keeping it native and soluble, alongside soluble-fibre recovery.
4. Low-temperature drying: vacuum-drum and spray drying at moderate temperature that stabilise wet side streams — which spoil within hours — without caramelising sugars or oxidising polyphenols.

Sectoral value chain

[Agri/food side streams] ──> [Collection & stabilisation] ──> [Bioreaction & lysis]
                                                                  │
                                                          (Fractionation & drying)
                                                                  │
                                                                  ▼
[Bakery / plant-meat / beverage] <── [Functional B2B ingredient] <─────┘

Value chain levels

Cross-cutting technologies of the sector:

• Enzymatic hydrolysis (biocatalysis): precise protease cleavage shortens side-stream protein chains to expose hydrophobic groups, recovering emulsifying and foaming function.
• Solid-state fermentation: Aspergillus oryzae and mushroom mycelium deodorise okara and spent grain while building functional protein and beta-glucan.
• Tangential-flow membrane concentration: ceramic-membrane ultrafiltration concentrates protein without thermal denaturation, preserving solubility and gelling.

02US

The United States leads on commercialisation, anchored by a voluntary certification standard that turned “upcycled” into a recognised on-pack claim and by a cluster of ingredient pioneers.

Upcycled Certified standard, okara and spent-grain flour, mycelium fermentation

• Renewal Mill: an Oakland company that dries and micronises okara from soymilk plants into a gluten-free, high-protein, high-fibre flour, extending the line to oat-pulp ingredients sold B2B and as baking mixes under the Upcycled Certified mark.
• ReGrained: the B2B brand of Upcycled Foods, Inc., whose patented rapid dehydration turns wet brewer’s spent grain into SuperGrain+ flour supplied to pasta, chip and bread makers.
• MycoTechnology: a Colorado fungi-fermentation firm producing ClearIQ bitter-blocking and mycelium-based ingredients from solid-state fermentation of agricultural streams, having refined its portfolio around taste and clean-label function.

03CN

China frames upcycling as a circular-agriculture and protein-diversification strategy, with state planning and a vast okara stream underpinning a research-led rather than startup-led sector.

Five-year circular-economy plans, okara solid-state fermentation, tea-waste polyphenols

• China Agricultural University: a Beijing research leader advancing solid-state fermentation of okara with Aspergillus oryzae and lactic-acid bacteria to remove the beany off-flavour and convert soy pulp into functional fibre and protein for noodles and baked goods.
• Okara scale: as the world’s largest soymilk and tofu producer, China generates millions of tonnes of wet okara a year, making its valorisation a national protein-security and waste-reduction lever.
• Tea-waste polyphenols: Chinese institutes lead work on upcycling tea-leaf waste from bottled-tea plants into high-purity catechins and polyphenols used as natural antioxidants and preservatives in the meat industry.

04EU

Europe pairs the Circular Economy Action Plan and Waste Framework Directive with a dense Dutch-led ingredient cluster and retail pull for circular foods.

Revyve yeast ingredients, coffee-oil upcycling, circular retail

• Revyve: a Dutch startup that physically fractionates spent brewer’s yeast — sourced in partnership with AB InBev — into protein and beta-glucan ingredients that replace egg white and methylcellulose in plant-based meats and baking, with a commercial plant in the Netherlands.
• Kaffe Bueno: a Danish company upcycling spent coffee grounds into KAFFOIL coffee-oil ingredients, whose KLEANSTANT bio-based surfactant won a 2025 industry award for converting coffee oil into a natural anionic surfactant.
• Retail pull and clean-label advantage: because most side streams (okara, spent grain, yeast) derive from foods already cleared for consumption, European producers can register ingredients on simplified pathways and market them as clean-label, fuelling “circular food” shelves at major retailers.

05Leading companies and research institutes

06Tech stack and innovations

The upcycled-ingredient industry stacks specialised bioreaction, membrane and drying technology to recover food-grade function from streams that were previously considered waste.

1. Enzymatic protein design (biocatalysis):
   • Wet side-stream proteins often have poor functionality after harsh upstream processing; mild enzymatic hydrolysis shortens the chains and exposes hydrophobic groups, lifting okara’s emulsifying capacity three- to four-fold.
   • The output mimics egg-white function (foaming, gelling) for vegan mayonnaise and bakery, replacing expensive isolates.
2. Low-temperature vacuum and spray drying:
   • Wet brewer’s spent grain spoils within 4–6 hours at water activity above 0.9, so vacuum-pulse dryers evaporate moisture at around 55 degrees Celsius to prevent lipid rancidity and polyphenol oxidation.
   • Spray drying with low-shear nozzles at controlled inlet and outlet temperatures concentrates protein past 70 percent dry matter while keeping native gelling and foaming intact.
3. Downstream membrane fractionation:
   • Multi-stage disc centrifuges and ceramic ultrafiltration membranes split a single stream — such as starch-processing waste — into a protein concentrate above 65 percent and high-molecular-weight soluble fibre (beta-glucans).

07Value chains and production pipelines

Industrial pipeline of brewer’s-yeast-to-functional-protein ingredient (HACCP / ISO 22000 food-safety standards)

┌───────────────────────────┐      ┌───────────────────────────┐
│ 1. Collection & stabilise │ ───> │ 2. Autolysis & enzymatic  │
│    spent brewer's yeast   │      │    lysis                  │
└───────────────────────────┘      └───────────────────────────┘
                                                  │
                                                  ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 4. Membrane concentration │ <─── │ 3. Three-phase separation │
│    (TFF ultrafiltration)  │      │    & debittering          │
└───────────────────────────┘      └───────────────────────────┘
              │
              ▼
┌───────────────────────────┐      ┌───────────────────────────┐
│ 5. Gentle spray drying    │ ───> │ 6. Standardisation & pack │
└───────────────────────────┘      └───────────────────────────┘

Stage 1: Collection, logistics and stabilisation

Wet liquid brewer’s yeast at a water activity above 0.95 is collected from brewery fermenters, cooled to 4 degrees Celsius and acidified with food-grade citric acid to block pathogen growth and autolysis, then shipped to the processing plant in isothermal tankers.

Stage 2: Controlled thermal and enzymatic autolysis

The yeast suspension is heated to about 55 degrees Celsius and dosed with specific peptidases; heat and endogenous enzymes break the tough yeast wall of mannoproteins and beta-glucans, releasing soluble cytoplasmic proteins into the water phase before a 85-degree pasteurisation step halts the reaction.

Stage 3: Three-phase separation and debittering

The hot mass is centrifuged and washed with a mild alkaline rinse to desorb bitter hop resins, splitting it into an insoluble cell-wall fibre fraction rich in beta-glucans and a clear liquid extract of soluble proteins and nucleotides.

Stage 4: Membrane concentration and ultrafiltration

The liquid protein extract is cooled to 10 degrees Celsius and run through a tangential-flow ceramic ultrafiltration unit with a roughly 10-kilodalton cut-off; salts and water pass through as permeate while high-molecular-weight functional proteins are retained and concentrated to 25–30 percent dry matter.

Stage 5: Gentle spray drying

The protein concentrate is fed into a spray-drying tower with low-shear nozzles; an inlet near 150 degrees Celsius and outlet near 70 degrees Celsius keep the contact time short enough to avoid heat denaturation, preserving native gelling and foaming function.

Stage 6: Standardisation and packaging

The dried light-cream powder is tested for protein content (target above 70 percent dry matter), solubility, emulsifying capacity and microbiological purity, then blended for batch uniformity, vacuum-packed in multi-layer kraft sacks and shipped to plant-based-meat and bakery customers.