Removal of azimsulfuron and zoxamide using a tapered variable diameter biological fluidized bed combined with electrochemistry: Mass fraction division, energy metabolism activity and carbon emissions.
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| Abstract |
The performance of the combination system of tapered variable diameter biological fluidized bed (TVDBFB) with electrochemistry (EC) was evaluated for removing azimsulfuron and zoxamide under different temperatures and influent concentrations. Maximum removal efficiency of azimsulfuron and zoxamide could reach 94% and 98% under higher influent concentration (about 780 mg/L). As temperature decreased from 32 ℃ to 8 ℃, the mSe increased from 48% to 56%, and the mSo and mSxv decreased from 30% to 22% and 27% to 24%, respectively. As the influent COD equivalent concentration of azimsulfuron and zoxamide enhanced from 260 mg/L to 780 mg/L, the Kd increased from 0.06 d-1 to 0.23 d-1. Temperature and influent concentration were main influencing factors of DHA, ATP and ETS. Increasing aeration in TVDBFB and HRT in EC under shock conditions could improve azimsulfuron and zoxamide removal efficiency, however, it was also accompanied by higher carbon emissions.
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| Authors | Liqiang Yu, Wenyu Liu, Lixue Liu, Jian Dong, Fei Han, Zhaobo Chen, Dongxue Hu, Hui Ge, Hongcheng Wang, Yubo Cui, Wanjun Zhang, Xuejun Zou, Ying Zhang, Shuchen Liu, Longmei Zhao |
| Journal | Bioresource technology (Bioresour Technol) Vol. 346 Pg. 126518 (Feb 2022) ISSN: 1873-2976 [Electronic] England |
| PMID | 34896261 (Publication Type: Journal Article) |
| Copyright | Copyright © 2021 Elsevier Ltd. All rights reserved. |
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