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- Title
Effects of oxygen content on the simultaneous microbial removal of SO and NO in biotrickling towers.
- Authors
Wang, Xing; Bi, Xiao; Sun, Pei; Chen, Jin; Zou, Ping; Ma, Xiao; Zhang, Jing; Wang, Hai; Xu, Xiao
- Abstract
This study uses microbial methods to research the influence of oxygen (O) content on the removal efficiency of sulfur dioxide (SO) and nitrogen oxides (NO) in a tandem twin-towers desulfurization and denitrification process system. Oxygen can play a significant role in biotrickling towers. Other important factors had already been optimized prior to the study, including inlet concentration, gas flow rate, and temperature. SO and NO were prepared by a chemical method. A gas flow meter was used to regulate nitrogen (N) that had been stored in steel cylinders. In this way, the O content was adjusted in the biotrickling towers by controlling the N flow rate. Five gradients of O content were selected for investigation, namely 4, 8, 12, 16, and 20%. Results indicated that the SO removal efficiency from mixed gas (SO and NO) can reach 100%, from all of the five O gradients, in biotrickling towers. In a tandem twin-towers desulfurization and denitrification process system, the NO removal efficiency and the inlet concentration of nitrogen dioxide (NO) gradually increased as the O content increased. Specifically, the average removal efficiency of NO increased from 49.28 to 80.85% as the O content changed from 4 to 20%. The oxygen levels influenced the removal of NO but the SO removal efficiency in mixed gas was always stable.
- Subjects
OXYGEN; NITROGEN oxides; DESULFURIZATION; SULFUR dioxide; DENITRIFICATION; CHEMICAL reduction
- Publication
Biotechnology & Bioprocess Engineering, 2015, Vol 20, Issue 5, p924
- ISSN
1226-8372
- Publication type
Article
- DOI
10.1007/s12257-015-0138-5