CIRCALGAE: Turning Algae Waste Streams into High-Value Food, Feed and Cosmetic Ingredients

The CIRCALGAE consortium is coordinated by Chalmers University of Technology and brings together 21 organisations from 11 European countries, including algae producers, biotechnology companies, food and cosmetics manufacturers, research and technology organisations, universities and innovation consultancies.

Civitta is the consortium partner responsible for key activities related to sustainability, market analysis and exploitation. The project is funded under Horizon Europe, with a total project budget of approximately €10.27 million and an EU contribution of €8.51 million. 

CIRCALGAE addresses an important untapped opportunity in the European blue bioeconomy: large quantities of biomass and residual streams generated by microalgae and macroalgae industries are currently underutilised.

The project applies a cascade biorefinery approach to transform these streams into high-value ingredients for food, feed and cosmetics, rather than treating them as waste or low-value by-products.

The project started in October 2022 and runs until September 2026 under the Horizon Europe call HORIZON-CL6-2021-CIRCBIO-01. Its ambition is to demonstrate three scalable blue biorefinery schemes, develop 12 demonstrator products and qualify two final products for the market, while assessing their environmental, economic and social implications. 

CIRCALGAE needed to address both the technical and commercial barriers preventing the full valorisation of algae biomass and industrial side-streams:

• Identifying viable value chains by determining which algae species, residual streams, products and processing routes offer the strongest combination of technical feasibility, market demand and economic potential.
• Demonstrating sustainability beyond the technology itself by assessing whether new algae-based products actually deliver environmental and economic advantages when the complete production pathway is considered.
• Connecting biorefinery technologies with market requirements by translating extracted bioactive compounds and functional ingredients into food, feed and cosmetic applications that meet safety, functionality, regulatory and customer requirements.
• Supporting market uptake of emerging products by addressing the market, business-model, exploitation and investment considerations required to move promising algae innovations towards commercial deployment.

Civitta combined market intelligence, sustainability assessment and economic analysis to connect CIRCALGAE’s technological innovations with viable business opportunities and credible pathways towards market uptake.

• Conducted market analysis of the algae sector and potential applications, identifying market opportunities, value-chain structures and promising business areas for CIRCALGAE’s outputs. The project documentation explicitly identifies our role in market analysis within the “Sustainability, exploitation and market outreach” activities. 
• Assessed the environmental performance of algae-based valorisation pathways through Life Cycle Assessment, with us representing CIRCALGAE as its LCA expert in the European collaboration on harmonising LCA approaches for algae-based products. 
• Applied life-cycle thinking to the valorisation of algae production waste streams, helping determine the environmental implications of converting residual biomass into higher-value ingredients rather than treating it as waste. 
• Supported Life Cycle Costing and the economic assessment of the emerging biorefinery pathways, linking environmental performance with the economic conditions required for viable deployment. 
• Contributed to the development of the CIRCALGAE business case by connecting data on biomass cultivation, composition, side-stream availability and processing routes with the identification of the most promising algae, products and processing pathways. 
• Connected CIRCALGAE with the wider European algae innovation ecosystem, including cross-project collaboration on LCA methodology and market development, strengthening comparability and knowledge transfer across emerging algae value chains. 

CIRCALGAE was successfully funded under Horizon Europe and launched in October 2022. By the second reporting period, the project had progressed from concept development towards pilot-scale demonstration: several extraction processes had been transferred to pilot scale, functional and bioactive ingredients had been produced from algae side-streams, and more than 30 prototype products had been developed and tested across food, feed and cosmetics. 

The project is working towards three blue biorefinery schemes scaled to hundreds of kilograms, 12 demonstrator products and three products qualified for market, with environmental, economic, regulatory and consumer-acceptance aspects considered alongside technical performance.

The broader significance is the demonstration of a circular model in which residual algae biomass becomes a source of valuable proteins, fibres, pigments and other bioactive compounds, supporting new European value chains in the blue bioeconomy while reducing resource losses and waste.

CIRCALGAE demonstrates that circular bioeconomy innovations need to be evaluated as complete value chains rather than individual technologies. A promising extraction technology only creates meaningful impact when there is sufficient feedstock, a valuable end product, acceptable environmental performance, a viable cost structure and a market willing to adopt it.

Combining these perspectives early helps identify which innovation pathways have the strongest potential for scale-up and commercialisation.

The project also demonstrates our ability to bridge technology, sustainability and markets. By combining LCA and LCC with market intelligence and business-case development, Civitta helps research consortia move from “what can we produce?” towards the more commercially relevant questions of “where does it create value, under what conditions, and how can it be scaled sustainably?”