Prof. Hassan El Bari is a full professor at Ibn Tofail University, in Morocco. He has a PhD in Material Sciences from INPL (France) and a "Doctorat d’Etat" in Mechanical Engineering from the University Mohamed V-Morocco. Prof. El Bari is the President of the Moroccan Association of Solid Waste. He was Master Degree Coordinator for Waste Management (2010–2014) and has a long experience in teaching subjects related to waste management, bioenergy, and biogas technology. He has also been involved in many funded projects as a coordinator and partner. Prof. El Bari is an Associate Editor for the Cleaner Waste Systems Journal (Elsevier) and for Applied Science and Engineering Progress. He is co-editor of the books “Ecological Sustainable Waste Management—Energetic Utilization of Organic Waste” (2018), "Waste Management in Developing Countries” (2023), and “Biogas in the Circular Economy: Technology, Production, and Applications” (2025).Abdellatif Barakat is a Director Researcher in bioprocess engineering and valorization of biomass at UMR IATE, INRAE, Montpellier University (Montpellier Agro Institute), in France. He is also affiliated with CAES, University Mohammed VI Polytechnic (UM6P), Benguérir, Morocco. He received his PhD in chemistry and physicochemical of biopolymers from Reims University, France. He has published over 150 papers in international journals, 4 patents, and 6 book chapters.

• 1. Suitable feedstocks, advanced combining pre-treatment for optimized biomethane and biohydrogen production2. Innovative biogas digester technology3. Artificial neural networks and genetic algorithms for modeling and optimizing biogas production4. Applications and future of in-situ biogas purification and upgrading technologies5. Carbon neutrality and challenges in biogas economy: Bioeconomy case studies6. Valorization of digestate as a biofertilizer and its energy recovery using thermochemical conversion7. Biomethane and as an innovative solution for decarbonized transport8. Biomethane in the water-energy-food nexus context9. Biohydrogen production for power and transport10. Life cycle assessment and cost-benefit analysis of biogas and biohydrogen production