Turbidity removal using fruit seeds as a natural coagulant
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nhunghtt@hcmute.edu.vnKeywords:
Natural coagulants, fruit seeds, turbidity removal, rambutan, sugar-apple and jujubeAbstract
In this study, natural coagulant solutions from rambutan, sugar-apple and jujube seeds were prepared by chopping, grinding, drying and combining with suitable inorganic solvents (NaOH, NaCl, distilled water). Influent factors such as pH of water, dose of fruit seed and solvents to extract were studied to examine the efficiency of turbidity removal with synthetic turbid water by Jar test. The curve of turbidity removal for fruit seeds are rather different compared to that of poly aluminum chloride (PAC). The lower the pH, the higher the efficiencies of three fruit seeds are. At pH = 3, 20 mg/L of coagulants from jujube seeds and at pH = 4, 20 mg /L of coagulants from rambutan and sugar-apple seed are the optimal condition for synthetic turbid water treatment. Under optimal condition of coagulants from jujube, rambutan and sugar-apple seeds the turbidity removal efficiency is 83%, 89% and 86%, respectively. This reveals a potential application of these natural coagulants for water treatment.
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