Greenhouse Byproduct Valorisation

The PRIMARY project introduces a circular approach for the valorisation of greenhouse residues in the agri-food sector. Organic by-products such as tomato and cucumber stems, leaves, and unsold produce are transformed into high-value bio-based ingredients and materials instead of being discarded. Through advanced bioconversion processes, including solid-state and submerged fermentation, as well as material applications such as foam forming, these residues are converted into protein-rich feed and food ingredients and sustainable biomaterials. The pilot implementation in Attiki and Viotia, Greece and Ostrobothnia, Finland demonstrates how greenhouse waste can be efficiently collected, processed, and reintegrated into the value chain. This approach aims to reduce environmental impacts, support circular economy practices, and create new business opportunities for farmers and SMEs.