title: [Investigation of effect and process of nitric oxide removal in rotating drum biofilter coupled with absorption by Fe(II) (EDTA)].
abstract: In order to accelerate the NO removal efficiency, a novel and effective system was developed for the complete treatment of NO from flue gases. The system features NO absorption by Fe(II) (EDTA) and biological denitrification in a rotating drum biofilter (RDB) so as to promote biological reduction. The experimental results show that a moderate amount of Fe(II) (EDTA) was added to the nutrient solution to improve the mass transfer efficiency of NO from gas to liquid, with the concomitant formation of nitrosyl complex Fe(II) (EDTA)-NO. Under the experimental conditions of rotational speed was at 0.5 r x min(-1), EBRT of 57.7 s, temperature was at 30 degrees C, pH was 7-8, with the increasing concentration of Fe(II) (EDTA) was from 0 mg x L(-1) to 500 mg x L(-1), the NO removal efficiency was improved from 61.1% to 97.6%, and the elimination capacity was from 16.2 g (m3 x h)(-1) to 26.7 g (m3 x h)(-1). In order to simulate the denitrifying process of waste gas containing NO by using RDB coupled with Fe(II) (EDTA) absorption, a tie-in equation of NO removal and the Fe(II) (EDTA) concentration added in RDB was established. The experimental NO removal efficiency change tendency agrees fairly with that predicted by the proposed equation.
authors.affiliation: College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China. bec@zjut.edu.cn
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.forename: Xuan
authors.initials: X
authors.lastname: Yang
authors.forename: Jian-Ming
authors.initials: JM
authors.lastname: Yu
authors.forename: Yi-Feng
authors.initials: YF
authors.lastname: Jiang
authors.forename: Jian-Meng
authors.initials: JM
authors.lastname: Chen
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000302:isolation & purification*; D001419:Bacteria / Q000378:metabolism; D019149:Bioreactors / Q000382:microbiology; D004492:Edetic Acid / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D005374:Filtration / Q000295:instrumentation*; D009569:Nitric Oxide / Q000302:isolation & purification*
chemical_list: D000393:Air Pollutants; D005296:Ferrous Compounds; C055526:Fe(II)-EDTA; D009569:Nitric Oxide; D004492:Edetic Acid