1. State of the art of energy production from agricultural residues using thermochemical and biological processes 2. Valorising agricultural residues as biorefinery feedstocks: current advancements and challenges 3. Status and perspectives of agricultural residues in a circular and resource efficient context 4. Anaerobic co-digestion with fruit and vegetable wastes: An opportunity to enhance the sustainability and circular economy of the WWTP digesters 5. Self-Sustainability of Anaerobic Digestion for Conversion of Water Hyacinth into Value Added Bio-Fuels 6. Production of High Value-Added Amino Acids and Biofuels (H2&CH4) from Gelatinous Industry Wastewater Via Anaerobic Bio-Degradation Process 7. Bio-methanization of agricultural lignocellulosic wastes: Pretreatments 8. Occurrence and Fate of Recalcitrant in Anaerobic Treatment of Wastewater and Organic 9. Direct interspecies electron transfer (DIET) via conductive materials in anaerobic digestion of organic wastes 10. Anaerobic digestion of bioplastics 11. Kinetics models of Methane production from anaerobic digestion 12. Using Black Soldier Fly for Waste Management in Developing Countries 13. Resource recovery and circular economy approach in organic waste management using hydrothermal carbonization 14. Resource recovery from food waste via biological processes 15. Integral valorization of residual biomass: Hydrogen, polyhydroxyalkanoates, and compost production 16. Thermal hydrolysis sludge pre-treatment 17. Sustainable bio-waste recycling using insects 18. Butanol production from algal biomass by ABE fermentation proces 19. Polyhydroxyalkanoates production from algal biomass 20. Use of membrane technologies to recover microalgae biomass produced in wastewater 21. Black soldier fly biorefinery: A novel upcycling route for municipal biosolids