Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment
Agitation was a significant factor in achieving the high performance of the electrocoagulation (EC) system. Three EC systems with four parellal monopolar Al electrodes were established to clarify the influence of agitation methods on pollutants removal efficiency; magnetic stirring, continuous aerat...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-08-01
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| Series: | Frontiers in Environmental Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2021.719248/full |
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| author | Dang Trung Tri Trinh Dang Trung Tri Trinh Quach An Binh Tran Van Ty Duangdao Channei Auppatham Nakaruk Auppatham Nakaruk Wilawan Khanitchaidecha Wilawan Khanitchaidecha |
| author_facet | Dang Trung Tri Trinh Dang Trung Tri Trinh Quach An Binh Tran Van Ty Duangdao Channei Auppatham Nakaruk Auppatham Nakaruk Wilawan Khanitchaidecha Wilawan Khanitchaidecha |
| author_sort | Dang Trung Tri Trinh |
| collection | DOAJ |
| description | Agitation was a significant factor in achieving the high performance of the electrocoagulation (EC) system. Three EC systems with four parellal monopolar Al electrodes were established to clarify the influence of agitation methods on pollutants removal efficiency; magnetic stirring, continuous aeration, and combination of magnetic stirring and aeration. The aim of this work was to maximize industrial wastewater treatment in a short detention time and to understand the mechanisms that occurred in different EC systems. The coolant wastewater from the aluminum product industry was represented as industrial wastewater. The hybrid stirring-aeration EC system obtained a lower COD removal compared to the stirring EC system and the aeration EC system. Although aeration can cause an increase in COD removal due to complete circulation and effective coagulant formation of Fe (OH), however, the combination of aeration and stirring negatively affected the performance of CE. The possible reason was that the excessive agitation led to a rapid mixing of the solution, and then the coagulants and pollutants obtained insufficient time to form flocs to precipitate. The best EC performance was observed in the aeration EC system, followed by the stirring EC system, control system (without agitations), and the stirring aeration EC system, respectively, in the short detention time of 15 min. Furthermore, all EC systems could achieve an excellent COD removal of 91% when the detention time was sufficient (eg, 45 min for the stirring aeration EC system). Furthermore, the decreasing number of electrodes affected the COD removal efficiency, whereas the NaCl additive was insignificantly affected. |
| first_indexed | 2024-12-21T22:30:22Z |
| format | Article |
| id | doaj.art-773a1a2b9d5e4360ae883476c8fb27f0 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-12-21T22:30:22Z |
| publishDate | 2021-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-773a1a2b9d5e4360ae883476c8fb27f02022-12-21T18:48:06ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2021-08-01910.3389/fenvs.2021.719248719248Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial TreatmentDang Trung Tri Trinh0Dang Trung Tri Trinh1Quach An Binh2Tran Van Ty3Duangdao Channei4Auppatham Nakaruk5Auppatham Nakaruk6Wilawan Khanitchaidecha7Wilawan Khanitchaidecha8Institute of Environmental Science and Technology, Tra Vinh, VietnamCentre of Excellence for Innovation and Technology for Water Treatment, Naresuan University, Phitsanulok, ThailandDepartment of Academic Affairs and Testing, Dong Nai Technology University, Dong Nai, VietnamDepartment of Hydraulic Engineering, College of Technology, Can Tho University, Can Tho, VietnamDepartment of Chemistry, Faculty of Science, Naresuan University, Phitsanulok, ThailandCentre of Excellence for Innovation and Technology for Water Treatment, Naresuan University, Phitsanulok, ThailandDepartment of Industrial Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, ThailandCentre of Excellence for Innovation and Technology for Water Treatment, Naresuan University, Phitsanulok, ThailandDepartment of Civil Engineering, Faculty of Engineering, Naresuan University, Phitsanulok, ThailandAgitation was a significant factor in achieving the high performance of the electrocoagulation (EC) system. Three EC systems with four parellal monopolar Al electrodes were established to clarify the influence of agitation methods on pollutants removal efficiency; magnetic stirring, continuous aeration, and combination of magnetic stirring and aeration. The aim of this work was to maximize industrial wastewater treatment in a short detention time and to understand the mechanisms that occurred in different EC systems. The coolant wastewater from the aluminum product industry was represented as industrial wastewater. The hybrid stirring-aeration EC system obtained a lower COD removal compared to the stirring EC system and the aeration EC system. Although aeration can cause an increase in COD removal due to complete circulation and effective coagulant formation of Fe (OH), however, the combination of aeration and stirring negatively affected the performance of CE. The possible reason was that the excessive agitation led to a rapid mixing of the solution, and then the coagulants and pollutants obtained insufficient time to form flocs to precipitate. The best EC performance was observed in the aeration EC system, followed by the stirring EC system, control system (without agitations), and the stirring aeration EC system, respectively, in the short detention time of 15 min. Furthermore, all EC systems could achieve an excellent COD removal of 91% when the detention time was sufficient (eg, 45 min for the stirring aeration EC system). Furthermore, the decreasing number of electrodes affected the COD removal efficiency, whereas the NaCl additive was insignificantly affected.https://www.frontiersin.org/articles/10.3389/fenvs.2021.719248/fullelectrocoagulationcoolant wastewaterFe-Al electrodesstirringaeration |
| spellingShingle | Dang Trung Tri Trinh Dang Trung Tri Trinh Quach An Binh Tran Van Ty Duangdao Channei Auppatham Nakaruk Auppatham Nakaruk Wilawan Khanitchaidecha Wilawan Khanitchaidecha Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment Frontiers in Environmental Science electrocoagulation coolant wastewater Fe-Al electrodes stirring aeration |
| title | Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment |
| title_full | Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment |
| title_fullStr | Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment |
| title_full_unstemmed | Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment |
| title_short | Evaluation of Magnetic Stirring and Aeration on Electrocoagulation Performance in Actual Industrial Treatment |
| title_sort | evaluation of magnetic stirring and aeration on electrocoagulation performance in actual industrial treatment |
| topic | electrocoagulation coolant wastewater Fe-Al electrodes stirring aeration |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2021.719248/full |
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