Abstract: Metal chelate absorption combined with microbial reduction (BioDeNO_x) is a new method for flue gas denitrification developed in recent years. In this paper，the mechanism of this technology is introduced，and the research progress is reviewed，focusing on the absorption of NO with ferrous chelates，the microbial regeneration of complex absorbent，the technical process and improvements. Further research directions of this technology are proposed.

摘要： 络合吸收结合生物还原法（BioDeNO_x）是近年发展起来的一种烟气脱氮新技术。本文介绍了该法脱除NO_x的原理，综述了国内外有关该方法的研究进展，包括亚铁螯合剂对NO的吸收、络合吸收剂的生物再生、工艺过程及其改进技术等方面，提出了进一步研究的方向并对该法的发展前景进行了展望。