The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process

The applicability of Electrocoagulation (EC) process in the treatment of simulated tannery wastewater was studied. Wastewater had an initial sulfide S2-, COD, total chromium content of 76.277.16 mg/L, 1145.651.2 mgO2/L, and 18.20.3 mg/L, respectively. The electrode material Fe/Al as anode/cathode ga...

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Main Author: Lieu, Uyen Tu
Format: text
Language:English
Published: Animo Repository 2012
Online Access:https://animorepository.dlsu.edu.ph/etd_masteral/4284
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Institution: De La Salle University
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spelling oai:animorepository.dlsu.edu.ph:etd_masteral-111222021-01-14T00:46:35Z The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process Lieu, Uyen Tu The applicability of Electrocoagulation (EC) process in the treatment of simulated tannery wastewater was studied. Wastewater had an initial sulfide S2-, COD, total chromium content of 76.277.16 mg/L, 1145.651.2 mgO2/L, and 18.20.3 mg/L, respectively. The electrode material Fe/Al as anode/cathode gave the most effective treatment as compared to Fe/Fe and Al/Al in the 1-L beaker tests. In the 18-L reactor employing Fe/Al electrodes, the effects of operational parameters, such as current density (9.6 - 48 A/m2), inner-electrode distance (10 43 mm) and recirculation flow rate (0.4 4 L/min) on the removal of sulfide, COD, total chromium, and other characteristics including pH, temperature, conductivity, dissolved oxygen, applied voltage, electrode dissolution and energy consumption was investigated. When current was applied, there was a quick change in the color of wastewater from turbid greenish blue to totally black and finally to colorless solution the pollutant abatement was obtained at 95 % of S2-, 83 90 % of COD, and 99 % of total Cr. The experiments showed that very high current density led to passivation of electrodes and ineffective treatment of wastewater. EC was suitable to work in a low mixing regime. The relationships of operational parameters and the responses, namely the removal of S2-, COD, Cr and the energy consumption, were achieved via Response Surface Methodology (RSM) employing a central composite design. The effective EC run with the minimum energy consumption was 1.052 kWh/m3 when the process was performed at 19.2 A/m2 of current density, 16 mm of inner-electrode distance, 1L/min of recirculation flow rate and 90 minutes of electrolysis time. Overall, the EC process was effective in the treatment of tannery wastewater. 2012-01-01T08:00:00Z text https://animorepository.dlsu.edu.ph/etd_masteral/4284 Master's Theses English Animo Repository
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description The applicability of Electrocoagulation (EC) process in the treatment of simulated tannery wastewater was studied. Wastewater had an initial sulfide S2-, COD, total chromium content of 76.277.16 mg/L, 1145.651.2 mgO2/L, and 18.20.3 mg/L, respectively. The electrode material Fe/Al as anode/cathode gave the most effective treatment as compared to Fe/Fe and Al/Al in the 1-L beaker tests. In the 18-L reactor employing Fe/Al electrodes, the effects of operational parameters, such as current density (9.6 - 48 A/m2), inner-electrode distance (10 43 mm) and recirculation flow rate (0.4 4 L/min) on the removal of sulfide, COD, total chromium, and other characteristics including pH, temperature, conductivity, dissolved oxygen, applied voltage, electrode dissolution and energy consumption was investigated. When current was applied, there was a quick change in the color of wastewater from turbid greenish blue to totally black and finally to colorless solution the pollutant abatement was obtained at 95 % of S2-, 83 90 % of COD, and 99 % of total Cr. The experiments showed that very high current density led to passivation of electrodes and ineffective treatment of wastewater. EC was suitable to work in a low mixing regime. The relationships of operational parameters and the responses, namely the removal of S2-, COD, Cr and the energy consumption, were achieved via Response Surface Methodology (RSM) employing a central composite design. The effective EC run with the minimum energy consumption was 1.052 kWh/m3 when the process was performed at 19.2 A/m2 of current density, 16 mm of inner-electrode distance, 1L/min of recirculation flow rate and 90 minutes of electrolysis time. Overall, the EC process was effective in the treatment of tannery wastewater.
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author Lieu, Uyen Tu
spellingShingle Lieu, Uyen Tu
The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
author_facet Lieu, Uyen Tu
author_sort Lieu, Uyen Tu
title The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
title_short The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
title_full The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
title_fullStr The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
title_full_unstemmed The effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
title_sort effects of operational parameters on the removal of pollutants from simulated tannery wastewater by electrocoagulation process
publisher Animo Repository
publishDate 2012
url https://animorepository.dlsu.edu.ph/etd_masteral/4284
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