Efficiency of natural coagulants for treatment of public market wastewater

The study aimed to investigate the efficiency Moringa oleifera seed and Chickpea (Cicer arietinum) for the reduction Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), Oil and Grease (O&G), turbidity and colour in public market wastewater. Optimization studies were undertaken for different dosage, pH and mixing rates. The samples of wastewater were collected from Rengit Public Market, Batu Pahat. The efficiency of M. oleifera seed and C. arietinum were investigated in coagulation and flocculation process with jar test to determine the optimum of dosage, pH and mixing rate. The results revealed that M. oleifera and C. arietinum exhibited high efficiency for the reduction COD, TSS, O&G, colour and turbidity with 180 mg/L of dosage concentration at pH 7 and 150 rpm of mixing rate. The lab-scale system was designed with 6 liters of capacity and 3 effluent collection tanks at the optimal conditions determined in this study. The adsorption isotherms and equilibrium model of adsorption system were analysis using Langmuir and Freundlich models. The adsorption isotherms studies were fitted well by Langmuir model than Freundlich model. The RL value was 47.39 mg/L, 9.20 mg/L, 54.64 mg/L, 1.51 Pt.Co and 2.91 NTU for COD, TSS, O&G, colour and turbidity respectively, which indicated the favourability of M. oleifera as an efficient coagulants. The results proved that M. oleifera and C. arietinum as natural coagulants have the capability to remove pollutants in wastewater. The study shows that M. oleifera seed and C. arietinum act as an efficient natural coagulants, flocculant and adsorbent for the treatment of public market wastewater to reduce COD, TSS, O&G, colour and turbidity