Phosphate Removal by Electrocoagulation Process: Optimization by Response Surface Methodology Method (original) (raw)
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Nutrient removal from wastewater is necessary action to be taken due to its ability to develop unhygienic conditions when disposed in natural water bodies. Various anaerobic biological processes and final polishing pond possess inability to alter nutrients from wastewater. At the same time, electrocoagulation despite of type of wastewater has showed good removal of variety of pollutants. Hence, focus of this study was kept on removal of phosphate from simulated wastewater and to better understand effect of various process variables of electrocoagulation treatment. Current density, electrolysis time and initial pH are studied process variables in this work, while phosphate removal percentage was response taken. Response surface methodology was used for designing experiments and statistical analysis of data. Design Expert software version 8.0 was used for this purpose. It has been revealed through study that applied current and time has significant effect on PO4 removal but initial pH was found to be insignificant.
Phosphate removal from wastewater by electrocoagulation using aluminium electrodes
American Journal of Environmental Engineering, 2014
The removal of phosphate from wastewater by electrocoagulation using aluminum electrodes was investigated. The main objectives of the experiments were to investigate the effects of the various operating parameters, such as current density, Electrocoagulation(EC)duration, initial phosphate concentration, temperature, pH of the solution, salt (NaCl) concentrations and electrolyte type [NaCl, KCl, NaNO 2, NaNO 3 ] on the phosphate removal efficiency from synthetic wastewater in batch EC process. The ranges of experimental parameters were between 10 and 150 mg PO 4/L for initial phosphate concentration, 3–10 for initial pH of the wastewater, 0.5–5 g NaCl/L for supporting electrolyte concentration, 2g/L of other supporting electrolytes KCl, NaNO 3, NaNO 2 and 1.13–4.54 mA/cm 2 for current density. The results showed that the maximum removal efficiency was achieved at a current density of 4.54mA/cm 2 , at a pH of 7.0 and 4-5 g/L NaCl.
The removal of phosphate from wastewater by electrocoagulation using aluminum electrodes was investigated. The main objectives of the experiments were to investigate the effects of the various operating parameters, such as current density, Electrocoagulation(EC)duration, initial phosphate concentration, temperature, pH of the solution, salt (NaCl) concentrations and electrolyte type [NaCl, KCl, NaNO 2 , NaNO 3 ] on the phosphate removal efficiency from synthetic wastewater in batch EC process. The ranges of experimental parameters were between 10 and 150 mg PO 4 /L for initial phosphate concentration, 3–10 for initial pH of the wastewater, 0.5–5 g NaCl/L for supporting electrolyte concentration, 2g/L of other supporting electrolytes KCl, NaNO 3 , NaNO 2 and 1.13–4.54 mA/cm 2 for current density. The results showed that the maximum removal efficiency was achieved at a current density of 4.54mA/cm 2 , at a pH of 7.0 and 4-5 g/L NaCl.