A biofilter was used to treat air polluted with ethylbenzene. Macadamia nutshells, which are a cheap waste product in Thailand, were chosen as the packing material for the biofilter. The moisture content (6.6 w%), water holding capacity (16.8 w%), nutshell density (1.3 g ml-1) and organic content (78.0 w%) of the macadamia nutshell were measured. The biofilter was operated during 5 months, in which several inlet loads (IL), empty bed residence times (EBRT) and temperatures (T) were applied. At a T of 303 ± 2 K removal efficiencies (RE) higher than 90 % were obtained for IL lower than 95 g m-3 h-1 and 85 g m-3 h-1 at EBRTs of 150 and 90 s, respectively. The estimated yield coefficient, determined from the carbon dioxide production, resulted in 0.79 g dry biomass per g of ethylbenzene (EB) degraded. The results illustrate that a biofilter with macadamia nutshells as carrier material is a good option for air treatment at temperatures from 298 to 308 K. In the mesophilic area, the performance of the biofilter will higher with a higher temperature.
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机译：使用生物滤池处理被乙苯污染的空气。澳洲坚果壳是泰国廉价的废品，被选为生物滤池的包装材料。测量了澳洲坚果壳的水分含量（6.6 w％），持水量（16.8 w％），果壳密度（1.3 g ml-1）和有机物含量（78.0 w％）。生物滤池运行5个月，其中施加了多个入口负荷（IL），空床停留时间（EBRT）和温度（T）。在303±2 K的T下，分别在150和90 s的EBRT下，IL分别低于95 g m-3 h-1和85 g m-3 h-1时，去除效率（RE）高于90％。由二氧化碳产量确定的估计产率系数导致每g乙苯（EB）降解0.79 g干生物质。结果表明，以澳洲坚果壳为载体的生物滤池是在298至308 K的温度下进行空气处理的良好选择。在中温区域，生物滤池的性能会随着温度的升高而提高。
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