Old Landfill Leachate and Municipal Wastewater Co-Treatment by Sequencing Batch Reactor Combined with Coagulation–Flocculation Using Novel Flocculant

The use of novel flocculants in combination with a sequencing batch reactor (SBR) for the treatment landfill leachate and municipal wastewater has been shown to be an effective method reducing polluted effluents. Co-treatment mixture was performed at 5%, 10%, 15% 20% SBR effluent treated by coagulation–flocculation. 6 d hydraulic retention time (HRT) 30 solids (SRT) removed 58 70% COD, 86 93% ammonia, 76 83% nitrate 69 95% phosphate. Coagulation–flocculation different dosages alum ferric chloride polyacrylamide grafted gum ghatti (GGI-g-PAM) as flocculant used chemical oxygen demand (COD), turbidity, total suspended (TSS) color removal. Maximum COD removal leachate, which 74% 2800 mg/L 77% 470 mg/L. Alum GGI-g-PAM 96% 82% turbidity 80% TSS, respectively. At combined coagulation–flocculation resulted 89% 98% TSS alum. 90% 86% nitrate, 94% TSS. Except both coagulants ratio phosphate level that met international standards discharges inland surface water. As such, new can help reduce water pollution from wastewater. In addition coagulation–flocculation, other physico–chemical processes also studied post-treatment options co-treatment mixture.