Stabilisation is an important first step to valorise agri-food side streams to be used for further macroconstituent extraction purposes which is regularly neglected. However, without adequate stabilisation methods, spoilage of agri-food biomass can occur resulting in macroconstituent losses, restricting further applications. Additionally, safe storage of agri-food biomass could overcome seasonal variability issues as all-year-round production is not always feasible, which could delay the processing of agri-food biomass for several months to a later more appropriate period. The overall objective of the PhD thesis is to gain more insight into the effect of stabilisation methods to preserve the macroconstituents of interest, assess bio-acidification and find alternative stabilisation methods other than freezing and drying.