Landfill leachate is a worldwide environmental pollution concern. Herein, the effects of aerobic-anaerobic processes, coagulation-flocculation, and advanced oxidation were investigated as remediation strategies to obtain high water quality. Anaerobic biodegradation reduced chemical oxygen demand (COD) by 60% and biochemical oxygen demand (BOD) by 67% in 42 days. Coagulation with polyaluminium chloride and ferric chloride efficiently removed suspended solids without any pH adjustment. In the advanced oxidation process (AOP), 4 g/L activated carbon as a catalyst and 4000 ppm H2O2 as oxidant removed COD by 95%, BOD by 96%, and dark brown colour by 89%. The present work considered minimal conditions to obtain the best results for a plant scale design and operation; therefore, to reduce operational costs no additional chemicals or physical conditions were considered.