Feasibility of peanut residual cake extract as the coagulant for water turbidity removal / Sara Elsaied Ahmed Ali

Sara Elsaied , Ahmed Ali (2022) Feasibility of peanut residual cake extract as the coagulant for water turbidity removal / Sara Elsaied Ahmed Ali. Masters thesis, Universiti Malaya.

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Abstract

In this study, the potential use of the peanut residual cake extract (PRCE) as the coagulant for water turbidity removal during water treatment has been investigated. PRCE was prepared by grinding it to powder using the ordinary household blender. PRCE was extracted using a solution made of 3 molar of sodium chloride (NaCl) to extract the active ingredient. The feasibility of PRCE coagulant was investigated using kaolin synthetic turbid and further tested with river water via the jar test. The study included the variables of coagulant extraction time and types of mixing during coagulation and flocculation; which were rapid and slow mixing with different initial level and concentration of pH and turbidity values. Rapid mixing time ranged from 1 to 4 minutes, while slow mixing time varied between 15 to 30 minutes. Finally, the performance of PRCE was compared with aluminum sulfate (alum) for the variable of extraction time, found that the most efficient coagulant extraction time occurred after ten minutes onward (n = 7, Anova Test at p = 0.05). Meanwhile, for the operational mixing time variables of rapid and slow, the latter has given a better result. Simple optimization study also included both variables of initial pH and turbidity values. It was found that pH from 6 to 8 was found to be effective in removing 96-98% of the turbidity. Under optimum conditions with the PRCE dosages from 5 to 10 mg/l), it was that had able to remove more than 90% of turbidity for the initial concentration of 200 to 500 NTU. Validation of PRCE as an effective coagulant was done by comparing it with alum; Both had shown that their results were comparable for turbidity removal efficiency, which were found to be at 90 % and 95.2 %, respectively.

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