A mixture of pumpkin and watermelon seeds as a coagulant for treatment of paint wastewater a case study of Global Paints (u) Limited
Namubiru, Patricia Magdalene
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The study was about treatment of paint waste water using a mixture of pumpkin and watermelon seeds as a coagulant. The study specifically focused on determining the turbidity, pH, conductivity, TDS and COD of paint waste water before and after treatment, treating the paint waste water samples with natural coagulant from a mixture of pumpkin and watermelon seed and determining the turbidity removal efficiency after treatment to assess the effectiveness of the coagulant. The waste water samples were collected using plastic bottles and transported to Makerere University, Chemistry laboratory for analysis. It was revealed that the optimum coagulant dosage for waste water removal was 0.5g and the optimum turbidity removal efficiency was 94.6%, the pH reduced from the initial range of 7.8-8.0 before coagulation to 7.1-7.2 with addition of coagulation solution while the conductivity ranged from 998 µs to 1100µs before coagulation and after applying the coagulant, 0.5g was the optimum dosage and the optimum conductivity was 8µs and the TDS reduced substantively to 4mg/L from 550mg/L at the optimum dosage of 0.5g and also COD substantially reduced from the initial 319.2mg/L before coagulation to 72.7mg/L with coagulation dosages of 0.6g. It was concluded that a mixture of pumpkin and watermelon seeds as a coagulant for paint waste water treatment has the potential to remove the contaminants from the waste water. It was recommended that Pumpkin and watermelon seeds should be further developed and processed to produce natural coagulants as this could help to reduce the incidence of water borne diseases that is caused by the aluminium in wastewater treatment, watermelon and pumpkin seeds coagulant should be recommended for use since it is readily available, they are rarely consumed as food and they are eco-friendly method of water treatment to reduce over reliance on chemical coagulants.