The use of Fusarium solani fungi in an expanded perlite packed biofilter was investigated for the treatment of a hexane polluted waste gas stream using selected ion flow tube mass spectrometry (SIFT-MS). The latter analytical technique proved to be of utmost importance to evaluate the performance of the biofilter at high time resolution (seconds) under various transient conditions, analogous to industrial situations.

The biofilter was operational for 277 days with inlet loads varying between 1 and 14 g m⁻³ h⁻¹ and applying an empty bed residence time of 116 s. The results showed a positive behaviour of the biofilter against different types of disruptions such as: (i) changes in the relative humidity of the inlet gas, (ii) stopping the carbon supply for 1, 5 and 10 days, (iii) varying the inlet hexane concentration (step increases and intermittent pulses) and (iv) limiting the availability of nutrients.

X-ray imaging (both conventional 2D μCT and X-ray fluorescence, XRF) was applied for the first time on biofilter media in order to get insight in the internal structure of expanded perlite and to visualise the biomass growth. The latter in combination with online porosity measurements using SIFT-MS provides fundamental information regarding the biofiltration process.

使用选定的离子流管质谱法（SIFT-MS），研究了在扩展的珍珠岩填充生物滤池中使用枯萎镰刀菌真菌来处理己烷污染的废气流。事实证明，后一种分析技术对于评估生物滤池在各种瞬态条件下（类似于工业环境）在高时间分辨率（秒）下的性能至关重要。

生物滤池可运行277天，入口负荷在1到14 g m ^-3 h ^-1之间变化，空床停留时间为116 s。结果表明，生物滤池对不同类型的破坏具有积极作用，例如：（i）进气的相对湿度变化，（ii）停止碳供应1、5、10天，（iii）改变入口己烷浓度（逐步增加和间歇脉冲）和（iv）限制营养物质的可用性。

X射线成像（传统的2DμCT和X射线荧光，XRF）是首次在生物滤池介质上应用，以了解膨胀珍珠岩的内部结构并可视化生物量的增长。后者与使用SIFT-MS进行的在线孔隙率测量相结合，可提供有关生物过滤过程的基本信息。