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Revolutionizing the Waste of Waste: A new Bioeconomy-based business for digestate

Project description

Reimagining digestate for a circular bioeconomy

Digestate is a nutrient-rich by-product from organic waste following anaerobic digestion but can contribute to nutrient pollution, posing environmental and regulatory challenges. Its complex, variable composition has kept its potential largely untapped. The EIC-funded ReWoW project aims to turn it into valuable resources using a modular adaptive fermentation system. Specifically, it combines microbial conversion with AI-driven optimisation to transform digestate into biosurfactants, aroma compounds and enhanced soil amendments. By uniting microbiology, engineering, AI and policy, ReWoW could redefine industrial biorefineries and unlock new economic opportunities.

Objective

The ReWoW project proposes a disruptive, high-risk/high-gain approach to transform digestate, the complex byproduct of anaerobic digestion, from an environmental burden into a valuable feedstock for a new bioeconomy. Currently underutilized and often treated as the Waste of Waste, digestate’s untapped potential is hindered by its heterogeneity, recalcitrance, and regulatory constraints. ReWoW introduces a novel valorization pathway through the development of Modular Adaptive Fermentation (MAF), a next-generation bioprocess that combines microbial bioconversion with artificial intelligence (AI)-driven optimization.
ReWoW will design and validate a modular system that integrates advanced pretreatments, sequential fermentations, and real-time monitoring to convert digestate into three model bioproducts: biosurfactants, aroma compounds, and enhanced soil amendments. A dual-layer AI tool will support the MAF platform, enabling real-time modelling, decision-making, and process control. The project also embeds a Safe and Sustainable by Design (SSbD) framework to ensure environmental, economic, and social performance from the outset.
By merging expertise in microbiology, engineering, environmental sciences, AI, economics, and policy, ReWoW sets the foundation for a transformative digestate-based biorefinery model. If successful, results will support new business models, regulatory advancements, and industrial applications, repositioning digestate as a cornerstone of an alternative circular bioeconomy.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-EIC - HORIZON EIC Grants

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Call for proposal

(opens in new window) HORIZON-EIC-2025-PATHFINDEROPEN

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Coordinator

UNIVERSITAT AUTONOMA DE BARCELONA
Net EU contribution
€ 710 205,00
Address
EDIF A CAMPUS DE LA UAB BELLATERRA CERDANYOLA V
08193 Cerdanyola Del Valles
Spain
Region
Este Cataluña Barcelona
Activity type
Higher or Secondary Education Establishments
Links
Total cost
€ 836 455,00

Participants (7)