Applied Microbiology and Biotechnology

, Volume 98, Issue 20, pp 8497–8512

Current advances of integrated processes combining chemical absorption and biological reduction for NOx removal from flue gas

Mini-Review

DOI: 10.1007/s00253-014-6016-9

Cite this article as:
Zhang, S., Chen, H., Xia, Y. et al. Appl Microbiol Biotechnol (2014) 98: 8497. doi:10.1007/s00253-014-6016-9

Abstract

Anthropogenic nitrogen oxides (NOx) emitted from the fossil-fuel-fired power plants cause adverse environmental issues such as acid rain, urban ozone smoke, and photochemical smog. A novel chemical absorption–biological reduction (CABR) integrated process under development is regarded as a promising alternative to the conventional selective catalytic reduction processes for NOx removal from the flue gas because it is economic and environmentally friendly. CABR process employs ferrous ethylenediaminetetraacetate [Fe(II)EDTA] as a solvent to absorb the NOx following microbial denitrification of NOx to harmless nitrogen gas. Meanwhile, the absorbent Fe(II)EDTA is biologically regenerated to sustain the adequate NOx removal. Compared with conventional denitrification process, CABR not only enhances the mass transfer of NO from gas to liquid phase but also minimize the impact of oxygen on the microorganisms. This review provides the current advances of the development of the CABR process for NOx removal from the flue gas.

Keywords

NOx Fe(II)EDTA Flue gas NO absorption Biological reduction CABR 

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, Department of Chemical and Biological EngineeringZhejiang UniversityHangzhouChina
  2. 2.Institute of Environmental EngineeringZhejiang UniversityHangzhouChina
  3. 3.Illinois State Geological SurveyUniversity of Illinois at Urbana–ChampaignChampaignUSA