00000ctm a22000003i 4500 UP-99796217612991703 Buklod 20190325184324.0 m |o d | ta 190325s2018 xx d r |||| u| (iLib)UPD-00397771312 DENGII rda eng LG 995 2018 E653 P46 Pempeña, Claribelle L. author. Removal of COD, turbidity and color in domestic wastewater using batch and continuous electrocoagulation system Claribelle L. Pempeña ; Joey D. Ocon, thesis adviser. Quezon City College of Engineering, University of the Philippines Diliman 2018. xi, 104 leaves color illustrations 28 cm text rdacontent unmediated rdamedia volume rdacarrier Thesis (Master of Science in Environmental Engineering)--University of the Philippines Diliman October 2018. F - no patentable invention or creation, not for personal publication and no confidential information. Yes - available to the general public. The present study investigated the application of electrocoagulation (EC) process in the treatment of the domestic wastewater using aluminum (Al) electrode as the sacrificial anode and stainless-steel (SS) a cathode in both batch and continuos-flow systems. Response Surface methodology (RSM) using central Composite Design (CCD) was utilized in the batch system to evaluate the optimum operating conditions that were current density = 83.63 A/m², electrode distance = 8mm, treatment time = 31.92 min and pH=7.39 on COD, turbidity and color removal efficiency of 66.11%, 94.44% and 93.48% respectively. The dissolution rate of Al anode is dependent on pH and current density, therefore the removal efficiencies increased when the current density, pH along with the treatment time were also increased. However, removal efficiencies decreased when inter-electrode distance was increased because of an increase in cell resistance attributed to the decrease in the electrical conductivity of wastewater. In a continuous-flow system, the effects of current density and inlet flowrate were evaluated through time series and curve fitting. An increase in current density along with an increase in hydraulic retention time led to an increase in removal efficiency due to the formation rate of anodic dissolution of Al3+ ions causing coagulation. The optimum current density at constant flowrate for continuous-flow system was 30 A/m² resulted to high removal efficiency values of 80.92% for COD, 93.24% for turbidity and 92.16% for color. While the slowest flowrate was the optimum inlet flowrate of 2.86 ml/min corresponded to highest removal efficiency of 79.50% for COD, 93.87 for turbidity and 93.27% for color. Therefore, this study proved that electrocoagulation process is an effective method of treatment of domestic wastewater using a batch and continuous-flow system. Electrocoagulation. Aluminum electrodes. Response Surface Methodology (RSM). Central Composite Design (CCD). Batch System. Continuous-flow system. Optimization. Ocon, Joey D. adviser. FI UP UPD DENG-II LG 995 2018 E653 P46 Thesis