Woertz J R, van Heiningen W N M, van Eekert M H A, Kraakman N J R, Kinney K A, van Groenestijn J W
Department of Civil Engineering, University of Texas at Austin, Austin, TX 78712, USA.
Appl Microbiol Biotechnol. 2002 Apr;58(5):690-4. doi: 10.1007/s00253-002-0944-5. Epub 2002 Feb 15.
Recent studies have focused on using vapor-phase bioreactors for the treatment of volatile organic compounds from contaminated air streams. Although high removal capacities have been achieved in many studies, long-term operation is often unstable at high pollutant loadings due to biomass accumulation and drying of the packing medium. In this study, three bench-scale bioreactors were operated to determine the effect of packing material and fungal predation on toluene removal efficiency and pressure drop. Toluene elimination capacities (mass toluene removed per unit packing per unit time) above 100 g m(-3) h(-1) were obtained in the fungal bioreactors packed with light-weight, artificial medium, and submersion of the packing in mineral medium once per week was found to provide sufficient moisture and nutrients to the biofilm. The use of mites as fungal predators improved performance by increasing the overall mineralization of toluene to CO(2), and by dislodging biomass along the bioreactor.
最近的研究集中在使用气相生物反应器处理受污染气流中的挥发性有机化合物。尽管在许多研究中已实现了高去除能力，但由于生物质积累和填料介质干燥，在高污染物负荷下长期运行往往不稳定。在本研究中，运行了三个实验室规模的生物反应器，以确定填料材料和真菌捕食对甲苯去除效率和压降的影响。在填充轻质人工介质的真菌生物反应器中，甲苯去除能力（每单位填料每单位时间去除的甲苯质量）超过100 g m(-3) h(-1)，并且发现每周将填料浸入矿物介质一次可为生物膜提供足够的水分和养分。使用螨虫作为真菌捕食者可提高性能，方法是增加甲苯向二氧化碳的整体矿化，并沿生物反应器去除生物质。
