Field applications for NOx removal from flue gas in a biotrickling filter by chelatococcus daeguensis TAD1

Abstract

In this study, effects of the initial nitrate, oxygen and carbon sources on the nitrification and denitrification rate were studied in a lab-scale biotrickling filter (l-BF) inoculated with Chelatococcus daeguensis TAD1, and the maximum nitrification and denitrification rate achieved to 30.08 mg-N/L/h and 100.8 mg-N/L/h, respectively. Thereafter, C. daeguensis TAD1 was initially inoculated into a pilot-scale biotrickling filter (p-BF) to remove NOx from the real flue gas of a coal-fired power plant, and a high removal efficiency of 86.7% at about 45-50°C was obtained. Analysis by PCRDGGE showed that TAD1 was predominant in the biofilm of l-BF, whereas TAD1 in the biofilm of p-BF coexisted with other microbes to remove NOx together. Overall, the present study demonstrated that C. daeguensis TAD1 was firstly found to be one of the best candidates for the efficient treatment of NOx on a large scale under high flue gas temperature. © Taiwan Association for Aerosol Research.