| Abstract |
| The objective of this research was to determine the optimum conditions for the eel farms recirculating water treatment using coagulation process. Response surface methodology (RSM) is used to get a set of designed experiments to obtain optimal multi factor operating conditions for the coagulation process. Response Surface Methodology explores the relationships between several explanatory variables and one or more response variables. It is a collection of mathematical and statistical techniques for empirical model building. The main objective is to optimize a response(Turbidity and UV254) which is influenced by independent variables PAC dosage and operating pH. PAC dosage were 1-25 mg/L and operating pH were 2-8, respectively. Rapid stirring(250 rpm, 1 min), slow agitation(30 rpm, 30 min) were experimenting with the conditions of precipitation(30min). COD, TN, Turbidity, UV254 was measured. Experimental results removal efficiencies of COD, TN, Turbidity, UV254 were up to 67 %, 87 %, 75 %, and 33 %, respectively. The independent variable to obtain Turbidity removal rate 65 %, COD removal rate 65 % and TN removal rate 86 % together were predicted pH 6.7 and 13 mgPAC/L. |
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| Key Words |
| Eel-farm, Aquaculture, Coagulation, Response Surface Methodology |
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