This research aims to optimize the mixing process in gas-lift anaerobic digesters of municipal sewage sludge since mixing and maintaining uniform contact between methanogenic bacteria and nutrients is essential. Wastewater municipal sludge sampling was performed at the Ahvaz West treatment plant (Chonibeh. Iran) during the summer of 2022. A Computational Fluid Dynamics (CFD) model was... https://parisnaturalfoodes.shop/product-category/zinc-spray/