https://scholars.lib.ntu.edu.tw/handle/123456789/598157
標題: | Simultaneous removal of NOX and SO2 from flue gas in an integrated FGD-CABR system by sulfur cycling-mediated Fe(II)EDTA regeneration | 作者: | Xu X.-J Wu Y.-N Xiao Q.-Y Xie P Ren N.-Q Yuan Y.-X Lee D.-J Chen C. DUU-JONG LEE |
關鍵字: | Fe(II)EDTA regeneration;Flue gas;NOX;S0 recovery;SO2;edetic acid;nitric oxide;sulfate;sulfide;sulfur;sulfur dioxide;thiosulfate;accumulation;biological analysis;microbial community;regeneration;Article;Azoarcus;bacterium;chemical absorption biological reduction;chemical reaction;controlled study;Dechloromonas;denitrifying bacterium;desulfurization;flue gas;heterotrophy;Klebsiella;nonhuman;Petrimonas;Pseudarcobacter;Saprospiraceae;sulfide oxidizing bacterium;sulfur cycle;waste component removal | 公開日期: | 2022 | 卷: | 205 | 來源出版物: | Environmental Research | 摘要: | Chemical absorption-biological reduction (CABR) process is an attractive method for NOX removal and Fe(II)EDTA regeneration is important to sustain high NOX removal. In this study a sustainable and eco-friendly sulfur cycling-mediated Fe(II)EDTA regeneration method was incorporated in the integrated biological flue gas desulfurization (FGD)-CABR system. Here, we investigated the NOX and SO2 removal efficiency of the system under three different flue gas flows (100 mL/min, 500 mL/min, and 1000 mL/min) and evaluated the feasibility of chemical Fe(III)EDTA reduction by sulfide in series of batch tests. Our results showed that complete SO2 removal was achieved at all the tested scenarios with sulfide, thiosulfate and S0 accumulation in the solution. Meanwhile, the total removal efficiency of NOX achieved ?100% in the system, of which 3.2%–23.3% was removed in spray scrubber and 76.7%–96.5% in EGSB reactor along with no N2O emission. The optimal pH and S2?/Fe(III)EDTA for Fe(II)EDTA regeneration and S0 recovery was 8.0 and 1:2. The microbial community analysis results showed that the cooperation of heterotrophic denitrifier (Saprospiraceae_uncultured and Dechloromonas) and iron-reducing bacteria (Klebsiella and Petrimonas) in EGSB reactor and sulfide-oxidizing, nitrate-reducing bacteria (Azoarcus and Pseudarcobacter) in spray scrubber contributed to the efficient removal of NOX in flue gas. ? 2021 Elsevier Inc. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85121256595&doi=10.1016%2fj.envres.2021.112541&partnerID=40&md5=181d650ddccb4f61b7199e763e9e1e2c https://scholars.lib.ntu.edu.tw/handle/123456789/598157 |
ISSN: | 00139351 | DOI: | 10.1016/j.envres.2021.112541 |
顯示於: | 化學工程學系 |
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