Agricultural activities generate considerable organic waste, including crop remains, animal manure, and food processing by-products. Given the urgency to mitigate climate change and reduce greenhouse gas emissions, integrating bioenergy solutions using residual biomass into the agricultural sector emerges as a critical strategy. The pig sector has high economic importance and is strategic for food self-sufficiency. Furthermore, the pig sector has relevant energy needs for feed production, heating animals, etc. Therefore, the RE-FEED project aims to act at two levels: (i) promote energy efficiency by conducting energy audits at pig farms and defining energy efficiency measures; (ii) assess a strategy to valorize waste by converting slurry into a valuable energy source and a safe organic fertilizer. The project will implement a proof-of-concept of renewable energy mix production at a pig farm: (i) an anaerobic co-digestion pilot, processing a feeding mixture of pig slurry and agri-food biomass, (ii) a photovoltaic system, and (iii) a solar thermal system. Several possible scenarios of biogas use will be assessed. The digestate produced will undergo solar thermal hygienization, ensuring its safety and adding value to the circular economy model. RE-FEED also aims to promote renewable energy communities at a local level, leading to increased energy efficiency, reduced greenhouse gas emissions, sustainable waste management, and potential carbon offset transactions. The following key performance indicators will measure the project’s impact: Increase in the Collaborative Network (IRC), Potential Uptake of Renewable Energy (PUER), Potential for Energy Self-Sufficiency (PASE), Reduction of Greenhouse Gas Emissions (R_GEE).