Seignez C, Adler N, Thoeni C, Stettler M, Péringer P, Holliger C
ENAC-Laboratory for Environmental Biotechnology, Swiss Federal Institute of Technology Lausanne (EPFL), Bâtiment CH-B Ecublens, 1015 Lausanne, Switzerland.
Appl Microbiol Biotechnol. 2004 Jul;65(1):33-7. doi: 10.1007/s00253-003-1531-0. Epub 2004 Jan 16.
Biotrickling filter (BTF) technology was applied for the treatment of waste gas containing a mixture of chlorobenzene and 1,2-dichlorobenzene. An adapted microbial community was immobilised on a structured packing material. The strategy followed was to reach high removal efficiencies at initially low mass loading rates followed by an increase of the latter. This procedure was successful and resulted in a short start-up period of only 2 weeks. A 3-month operation under steady-state conditions showed good performance, with >95% removal efficiency at a mass loading rate of 1,800 g m(-3) day(-1). Dimensionless concentration profiles showed that the chlorobenzenes were simultaneously degraded. Low dissolved organic carbon of 15 mg l(-1) and stoichiometric chloride concentrations in the trickling liquid indicated complete mineralisation of the pollutant. Transient-state experiments with five times higher mass loading rates caused a decrease in the removal efficiency that recovered rapidly once the mass loading rate returned to its original steady-state level. A progressive increase of the mass loading rate in a long-term performance experiment showed that the removal efficiency could be kept stable between 95 and 99% at loads of up to 5,200 g m(-3) day(-1) over several days. Above this mass loading rate, the elimination capacity did not increase any further. These results demonstrated that with a well-adapted inoculum and optimal operation parameters, a BTF system with excellent performance and stability that efficiently removes a mixture of chlorobenzene vapours from air can be obtained.
生物滴滤池（BTF）技术被应用于处理含有氯苯和1,2 - 二氯苯混合物的废气。一种经过驯化的微生物群落被固定在结构化填料上。采用的策略是在初始低质量负荷率下实现高去除效率，随后提高质量负荷率。该程序取得了成功，启动期仅为2周。在稳态条件下进行的3个月运行显示出良好的性能，在质量负荷率为1800 g m⁻³ 天⁻¹ 时去除效率大于95%。无量纲浓度分布表明氯苯同时被降解。滴滤液中低溶解有机碳含量为15 mg l⁻¹ 以及化学计量的氯化物浓度表明污染物完全矿化。质量负荷率高出五倍的瞬态实验导致去除效率下降，但质量负荷率一旦恢复到其原始稳态水平，去除效率迅速恢复。在长期性能实验中质量负荷率的逐步增加表明，在高达5200 g m⁻³ 天⁻¹ 的负荷下，几天内去除效率可稳定保持在95%至99%之间。高于此质量负荷率，去除能力不再进一步增加。这些结果表明，通过良好驯化的接种物和优化的运行参数，可以获得一个性能优异且稳定的BTF系统，该系统能有效去除空气中的氯苯蒸汽混合物。
