Composting process is applied to stabilize organic solid waste. But this method releases odorous organic compounds as by-product. Several methods are employed to cope with this nuisance problem. In this study, a full-scale biofilter unit was evaluated which is used in the treatment of composting waste gas. The performance of the open bed biofilter was evaluated by measurements volatile organic compounds (VOCs) and total organic carbon (TOC) from the inlet sampling ports and the outlet of the biofilter. Different sampling points were selected at the outlet of the biofilter in order to better represent removal efficiencies (RE) and determine the variability over the biofilter surface. The average TOC removal rate was 67 ± 11 %. Fifty-six different VOCs were sampled and then quantified by GC–MS. The average inlet concentrations for the target VOCs fed to the biofilter unit in November, January, April, May, and June were 57.9, 11.51, 4.54, 5.09, and 10.26 mg m⁻³, respectively and the removal efficiencies for these inlet concentrations were 45 %, 62 %, 32 %, 32 %, and 40 %, respectively. The deterioration of the packing material, caused reduced removal efficiencies by the time. The VOC removal rates were lower than TOC removal rates due to the selected VOC species. Further analyses were conducted with computational fluid dynamics (CFD). The effectiveness of the waste gas distribution was evaluated. Flow distribution within the biofilter was not uniform. This was also supported by the measurement results. Regions of the biofilter volume that are close to the inlet pipe had smaller retention times, which resulted in reduced treatment efficiencies.

堆肥过程用于稳定有机固体废物。但是这种方法会释放出有气味的有机化合物作为副产品。有几种方法可以用来解决这个令人讨厌的问题。在这项研究中，评估了用于处理堆肥废气的全尺寸生物过滤器装置。开放床生物过滤器的性能通过测量来自生物过滤器入口取样口和出口的挥发性有机化合物 (VOC) 和总有机碳 (TOC) 来评估。在生物过滤器的出口处选择了不同的采样点，以更好地代表去除效率 (RE) 并确定生物过滤器表面的可变性。平均 TOC 去除率为 67 ± 11 %。对 56 种不同的 VOC 进行采样，然后通过 GC-MS 进行定量。^-3，这些入口浓度的去除效率分别为 45 %、62 %、32 %、32 % 和 40 %。包装材料的劣化，导致去除效率随着时间的推移而降低。由于所选的 VOC 种类，VOC 去除率低于 TOC 去除率。使用计算流体动力学 (CFD) 进行了进一步分析。评估了废气分配的有效性。生物过滤器内的流量分布不均匀。这也得到了测量结果的支持。靠近入口管的生物过滤器体积区域的保留时间较短，这导致处理效率降低。