Enhanced removal of nitric oxide and carbon dioxide from flue gas in a biofilter: Effect of flue gas recirculation and Fe(II)EDTA addition
Journal
Bioresource Technology Reports
Journal Volume
18
Date Issued
2022
Author(s)
Abstract
Flue gas emission from combustion of fossil fuel is a growing environmental concern. In this study the effect of flue gas recirculation and Fe(II)EDTA addition on CO2 and NO removal from flue gas was explored in a biofilter. The effect of SO2 on CO2 and NOx removal efficiencies were also studied herein. The optimal removal efficiencies of CO2 (88.1%) and NO (85.8%) were achieved with the flue gas recirculation of 2:1. The presence of SO2 showed little impact on CO2 or NO removal while induced the decline of NO removal. The addition of Fe(II)EDTA clearly enhanced NO removal (~85%). The Illumina sequencing results showed that abundant sulfur-associated bacteria (Desulfobulbus, Desulfococcus, Sulfurovum, Chlorobium), nitrogen-associated bacteria (Thauera), fermentative bacteria (Longilinea and Anaerovorax), and various iron-reducing bacteria (Geobacter) were detected in the biofilter with Fe(II)EDTA addition. The synergistic effect of denitrifying/iron-reducing bacteria dedicated to the sustainable NO removal. © 2022
Subjects
CO2; Fe(II)EDTA; Flue gas recirculation; NO; SO2
Other Subjects
Bacteria; Biofilters; Efficiency; Flue gases; Flues; Fossil fuels; Iron compounds; Nitric oxide; Associated bacteria; Environmental concerns; Fe(II)EDTA; Flue gas recirculation; Flue-gas emissions; Iron reducing bacteria; NO; NO removal; NOx removal efficiency; Carbon dioxide
Type
journal article