Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant
With the increasingly strict discharge requirements, it is urgent for wastewater treatment plants (WWTPs) to find an efficient and feasible technology for advanced treatment. A three-dimensional (3D) electrode system was used to treat the real biochemical effluent of a WWTP collecting industrial and...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-03-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/87/5/1159 |
| _version_ | 1827971004719169536 |
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| author | Mengyu Tan Shuchi Zhang Jiayu Dong Jialu Huang Xiaolong Wu Xueni Tang Donglei Wu |
| author_facet | Mengyu Tan Shuchi Zhang Jiayu Dong Jialu Huang Xiaolong Wu Xueni Tang Donglei Wu |
| author_sort | Mengyu Tan |
| collection | DOAJ |
| description | With the increasingly strict discharge requirements, it is urgent for wastewater treatment plants (WWTPs) to find an efficient and feasible technology for advanced treatment. A three-dimensional (3D) electrode system was used to treat the real biochemical effluent of a WWTP collecting industrial and domestic wastewater in the present study. The 3D electrode system had the best performance at a current density of 2 mA/cm2 and an electrode distance of 3 cm. The kinetic analysis showed that the organic pollutant degradation conformed to pseudo-first-order kinetics. The COD removal of the 3D electrode system was more than twice that of the two-dimensional (2D) electrode system, and the energy consumption was 46.56% less than that of the 2D electrode system. By measuring the adsorption capacity and the electrocatalytic ability of the system to produce strong oxidizing species, it was demonstrated that granular activated carbon (GAC) had the synergy of adsorption and electrochemical oxidation, and ·OH playing the dominant role in oxidizing pollutants. At the same time, the organic contaminants adsorbed on GAC could be degraded. Finally, the adsorption–electrochemical oxidation mechanism was proposed. The above results highlighted that the 3D electrode system was a promising alternative method in the application of advanced treatment for WWTPs.
HIGHLIGHTS
A 3D electrode system had good performance in treating biochemical effluent of a wastewater treatment plant (WWTP).;
Kinetic analysis showed that COD degradation followed pseudo-first-order kinetics.;
The polarized granular activated carbon (GAC) had the catalytic ability to produce various strong oxidants.;
A new adsorption–electrolysis mechanism of the 3D electrode system was clarified.; |
| first_indexed | 2024-04-09T19:03:13Z |
| format | Article |
| id | doaj.art-078ae4a654e947619489724d1e3a8394 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-04-09T19:03:13Z |
| publishDate | 2023-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-078ae4a654e947619489724d1e3a83942023-04-07T15:42:56ZengIWA PublishingWater Science and Technology0273-12231996-97322023-03-018751159117310.2166/wst.2023.041041Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plantMengyu Tan0Shuchi Zhang1Jiayu Dong2Jialu Huang3Xiaolong Wu4Xueni Tang5Donglei Wu6 College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China Zhejiang Tianchuan Environmental Science & Technology Co., Ltd, Hangzhou 310000, China College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China With the increasingly strict discharge requirements, it is urgent for wastewater treatment plants (WWTPs) to find an efficient and feasible technology for advanced treatment. A three-dimensional (3D) electrode system was used to treat the real biochemical effluent of a WWTP collecting industrial and domestic wastewater in the present study. The 3D electrode system had the best performance at a current density of 2 mA/cm2 and an electrode distance of 3 cm. The kinetic analysis showed that the organic pollutant degradation conformed to pseudo-first-order kinetics. The COD removal of the 3D electrode system was more than twice that of the two-dimensional (2D) electrode system, and the energy consumption was 46.56% less than that of the 2D electrode system. By measuring the adsorption capacity and the electrocatalytic ability of the system to produce strong oxidizing species, it was demonstrated that granular activated carbon (GAC) had the synergy of adsorption and electrochemical oxidation, and ·OH playing the dominant role in oxidizing pollutants. At the same time, the organic contaminants adsorbed on GAC could be degraded. Finally, the adsorption–electrochemical oxidation mechanism was proposed. The above results highlighted that the 3D electrode system was a promising alternative method in the application of advanced treatment for WWTPs. HIGHLIGHTS A 3D electrode system had good performance in treating biochemical effluent of a wastewater treatment plant (WWTP).; Kinetic analysis showed that COD degradation followed pseudo-first-order kinetics.; The polarized granular activated carbon (GAC) had the catalytic ability to produce various strong oxidants.; A new adsorption–electrolysis mechanism of the 3D electrode system was clarified.;http://wst.iwaponline.com/content/87/5/1159biochemical effluentelectrochemical oxidationoxidizing speciesthree-dimensional electrode systemwastewater treatment plant |
| spellingShingle | Mengyu Tan Shuchi Zhang Jiayu Dong Jialu Huang Xiaolong Wu Xueni Tang Donglei Wu Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant Water Science and Technology biochemical effluent electrochemical oxidation oxidizing species three-dimensional electrode system wastewater treatment plant |
| title | Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| title_full | Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| title_fullStr | Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| title_full_unstemmed | Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| title_short | Removal performance and mechanism for a three-dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| title_sort | removal performance and mechanism for a three dimensional electrode system treating biochemical effluent of a wastewater treatment plant |
| topic | biochemical effluent electrochemical oxidation oxidizing species three-dimensional electrode system wastewater treatment plant |
| url | http://wst.iwaponline.com/content/87/5/1159 |
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