Sustainable bioprocess combining subcritical water pretreatment followed by anaerobic digestion for the valorization of jabuticaba (Myrciaria cauliflora) agro-industrial by-product in bioenergy and biofertilizer

•A novel bioprocess was designed combining SWP and AD.•SWP increased the methane yield in AD of jabuticaba by-product.•The bioprocess can generate electricity (543 kWh t−1) and heat (2,243 MJ t−1).•The sustainable bioprocess can avoid a total of 177.54 kg CO2-eq t−1.•The digestate generated can be used as a biofertilizer up to 0.3 g/L.