文章基本信息

标题：Biological removal of NOx from simulated flue gas in aerobic biofilter
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作者：JIANG R. ; HUANG S. ; and YANG J. 等
期刊名称：Global Nest
印刷版ISSN：1790-7632
电子版ISSN：2241-777X
出版年度：2008
卷号：10
期号：02
页码：241-248
出版社：Global Nest
摘要：A bench-scale biofiltration system was developed to evaluate the NOx removal efficiency under high oxygen concentration. The system had been running for 120 days and kept on a steady NOx removal rate above 80%. A stable NOx removal with an efficiency of more than 80% from the gas phase can be obtained by the bioreactor concept, when flue gas containing NO (400-600 ppmv) and a certain O2 concentration (0-20%). In the blank experiment, less than 35% NO was removed as oxygen increased. The tendency of the three curves about NO removal rate with various O2 concentrations was mainly similar but some differences in the highest and lowest removal rate happened in the definite O2 concentration range. Oxygen was shown to have a significant effect on NOx removal at the first two or three days when oxygen concentration increased sharply. The higher concentration NO influent gas contained, the longer time the microflora need to regain activities. Compared with humidifier, microbial regenerator which was incorporated in biofilter can improve aerobic denitrifying bacteria activity by applying alternating oxic¨Canoxic conditions in the presence of nitrate and nitrite. Oxidation-Reduction Potential (ORP) and Dissolved Oxygen (DO) were used to control the dose of carbon source.
关键词：NOx; NO; Aerobic denitrification; Nitrification; Aerobic biofilter system.