Abdessadek Essadek is a fourth year PhD candidate in Life & Environmental Sciences at the Faculty of Sciences, Mohammed First University (Oujda, Morocco), and a doctoral researcher at the Laboratory of Bioresources, Biotechnology, Ethnopharmacology and Health. He graduated with an MSc in Environment and Sustainable Development from Mohammed First University in 2022 and is currently completing a PhD (2022-present) on valorizing coastal macroalgae into renewable biomethane and soil positive digestates through anaerobic codigestion and life cycle carbon benefit framing. His work experience includes bench and fed-batch digestion, inhibition aware process optimization (salinity/ammonia), digestate characterization, controlled greenhouse tomato trials (randomized blocks; EC/Na management), and digital twin/decision support modelling in Python and MATLAB; he also completed internships at IFMEREE (Oujda) in 2022 and 2023-2024 on anaerobic digestion monitoring and optimization. His current research interests focus on circular bioeconomy, coastal biomass valorization, robust anaerobic digestion operation, and digestate agronomy; previous interests include co-digestion of olive pomace/olive mill wastewater and related agroenvironmental assessments. Professional society memberships and awards: not specified