Two biofilters with low pH and neutral pH were operated on pilot scale for the treatment of complex gases containing hydrogen sulfide, ammonia, acetic acid, and toluene during 205 days. Under the coexistence of complex gases, the low-pH biofilter (LPB) had higher removal efficiency (RE) for hydrogen sulfide and toluene, and the maximum efficiencies were 99.24% and 99.90% respectively, while the neutral-pH biofilter (NPB) had higher REs of ammonia and acetic acid, up to 99.90% and 99.92% respectively. Higher pressure drop up to 622 Pa was achieved in the LPB, most likely caused by the special structure of fungi different from bacteria. Determination of the concentration of carbon-based intermediates revealed the dominant microbial removal of acetic acid and clarified the relationship between the generation of intermediate and the performance of biofilters. Respective amount of CO₂ in the inlet and outlet showed that the mineralization capacity of the NPB was higher than that of the LPB, and it was more influenced by empty bed residence time (EBRT). The proportion of different forms of nitrogen and sulfur in the filler indicated that the removal of ammonia in the LPB mainly depended on the adsorption by moisture, while that in the NPB was microbial degradation, which was also the main removal pathway of sulfur regardless of pH condition. The removal and transformation of different substances in coexisting complex gases showed different characteristics in the LPB and NPB respectively.

在中试规模上运行了两个低pH和中性pH的生物滤池，用于在205天之内处理包含硫化氢，氨，乙酸和甲苯的复杂气体。在复杂气体共存的情况下，低pH生物滤池（LPB）对硫化氢和甲苯的去除效率（RE）更高，最大效率分别为99.24％和99.90％，而中性pH生物滤池（NPB）具有氨和乙酸的RE较高，分别高达99.90％和99.92％。在LPB中达到了最高622 Pa的压降，这很可能是由不同于细菌的真菌的特殊结构引起的。碳基中间体浓度的测定揭示了微生物对乙酸的主要去除作用，并阐明了中间体的产生与生物滤池性能之间的关系。一氧化碳量₂在入口和出口显示，NPB的矿化能力明显高于LPB的更高，并且它更受空床停留时间（EBRT）的影响。填料中不同形式的氮和硫的比例表明，LPB中氨的去除主要取决于水分的吸附，而NPB中氨的去除是微生物降解，这也是无论pH值如何去除硫的主要途径。健康）状况。共存的复杂气体中不同物质的去除和转化在LPB和NPB中分别显示出不同的特性。