Effects of gas flow-rate and inlet concentration on nitric oxide removal in an autotrophic biofilter

✍ Scribed by Jianmeng Chen; Jiade Wang; Jianfeng Ma

• Publisher: Wiley (John Wiley & Sons)
• Year: 2006
• Tongue: English
• Weight: 130 KB
• Volume: 81
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1463

✦ Synopsis

Abstract

The effects of inlet gas concentration and gas flow‐rate on the NO elimination process were studied in a laboratory‐scale biofilter and the removal process is discussed. Various pollutant inlet concentrations and gas flow‐rates were tested in the biofilter. The results showed that the removal efficiency increased with increase in the empty bed residence time (EBRT) and finally reached a steady state. The mass transfer process became the limiting step of NO removal when the EBRT was less than 2 min. A removal efficiency of ∼73% was obtained in the biofilter at an inlet concentration of 107.1 mg m^−3^. The removal efficiency decreased with increase in inlet concentration, whereas the removal capacity increased. The removal process consisted of chemical oxidation and bio‐nitrification in the biofilter. The bioprocess mainly contributed to the removal. Copyright © 2006 Society of Chemical Industry