Biotrickling Filtration of Nitric Oxide
Biotrickling Filtration of Nitric Oxide
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DOI：
10.1080/10473289.2000.10464033
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发表时间：
2000-04
影响因子：
2.7
通讯作者：
M. Chou;Jean-Hong Lin
中科院分区：
文献类型：
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作者：
M. Chou;Jean-Hong Lin
摘要采用生物滴滤塔对空气中的NO进行了处理。生物滴滤塔的填料为20-40 mm的高炉矿渣，比表面积为120 m2/m3。考察了反应器的运行稳定性，以及气体空床停留时间（EBRT）和营养物投加量对NO去除能力的影响。NO降解的生物膜的发展需要大约六周的时间，两周的有机碳缺乏导致生物膜从填料表面脱离。当进水NO浓度为892 ~ 1237 ppm，EBRT为118秒时，NO的去除率稳定在80%以上。随着EBRT的增大，出水NO浓度呈指数下降，进水NO浓度为203-898 ppm，EBRT为25 ~ 118 sec。投加营养盐是有效去除进水NO的必要条件，在实际应用中可采用C：P：N = 7：1：30和NaHCO 3：NO-N = 6.3的质量比。
ABSTRACT A biotrickling filter with blast-furnace slag packings (sizes = 20-40 mm and specific surface area = 120 m2/m3) was utilized to treat NO in an air stream. The operational stability, as well as the effects of gas empty-bed retention time (EBRT) and nutrient addition on the removal ability of NO, were tested. Approximately six weeks were required for the development of a biofilm for NO degradation, and a two-week organic carbon deficiency resulted in the detachment of biofilms from the packing surfaces. A steady removal rate of 80% was attained at specified influent NO concentrations of 892 to 1237 ppm and an EBRT of 118 sec. The effluent NO concentration diminished exponentially with enlarging EBRT, with influent NO concentrations of 203-898 ppm, and EBRTs of 25 to 118 sec. Nutrient addition is essential for efficient removal of the influent NO. Mass ratios of C: P: N = 7: 1: 30 and NaHCO3: NO-N = 6.3 could be used for practical applications.