IJEP 43(4): 304-312 : Vol. 43 Issue. 4 (April 2023)
Yakoopali Ibrahim and Vasanthi Padmanabhan*
B.S. Abdur Rahman Crescent Institute of Science and Technology, Department of Civil Engineering, School of Infrastructure, Vandalur, Chennai , Tamil Nadu – 600 048, India
Abstract
A lab-scale experiment was conducted to treat the textile dyeing effluent with the naturally available indigenous plant-based and indigenous mineral-based materials as a coagulant. Mahua longifolia (Iluppai) powder (MCP) and bentonite clay powder (BCP) were used as natural coagulants for treating textile dyeing wastewater. These natural coagulants were added at various dosages of 0-20 mL at constant intervals in the lab-scale coagulation process. The initial and final characteristics of textile dyeing effluent, like pH, turbidity and chemical oxygen demand (COD) were tested and compared for the coagulation process. For MCP dosage, the maximum removal efficiency of COD and turbidity was 44% and 83%, respectively at the coagulant dose of 12.5 mL. At 7.5 mL dosage of BCP and alum, the removal efficiency of COD and turbidity were 36%, 76% and 34%, 71%, respectively. The removal efficiency of COD and turbidity increased when the pH level was varied in the acidic range. The dosage of 12.5 mL of MCP has given the maximum COD and turbidity removal efficiency of 60% and 97%, respectively at acidic state. The indigenous plant-based MCP coagulant is locally available, cheaper in rate and can be used as coagulant for treating industrial effluent and providing better efficiency.
Keywords
pH, Chemical oxygen demand, Natural coagulant, Alum, Mahua longifolia, Bentonite clay
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