Arriaga Sonia, Revah Sergio
Laboratorio de Bioprocesos, Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlíxco No. 186, Col. Vicentina, C.P. 09340, México, Distrito Federal, Mexico.
J Ind Microbiol Biotechnol. 2005 Dec;32(11-12):548-53. doi: 10.1007/s10295-005-0247-9. Epub 2005 Jun 3.
A gas-phase biofilter inoculated with the fungus Fusarium solani, isolated from a consortium grown on hexane vapors, was used to degrade this compound. The biofilter, packed with perlite and operated with an empty bed residence time of 60 s, was supplied with hexane concentrations between 0.5 gm(-3) and 11 gm(-3). Biofilter performance was evaluated over 100 days of operation. Several strategies for supplying the nutritive mineral medium were assayed to maintain favorable conditions for the fungal growth and activity. The Fusarium system was able to sustain an average elimination capacity of 90 gm(-3)(reactor) h(-1) with a maximum of 130 gm(-3)(reactor) h(-1) . The mass transfer limitations due to high biomass development in the biofilter were confirmed in batch experiments. Bacterial contamination was observed, but experiments in the biofilter and in batch reactors using selective inhibitors and controlled pH confirmed the predominant role of the fungus. Results indicate that fungal biofilters can be an effective alternative to conventional abatement technologies for treating hydrophobic compounds.
接种了从在己烷蒸汽中生长的菌群中分离出的茄病镰刀菌的气相生物滤池，被用于降解该化合物。该生物滤池填充有珍珠岩，空床停留时间为60秒，所供应的己烷浓度在0.5克/立方米至11克/立方米之间。在100天的运行过程中对生物滤池性能进行了评估。为维持有利于真菌生长和活性的条件，对供应营养矿物培养基的几种策略进行了试验。镰刀菌系统能够维持平均90克/（立方米·小时）（反应器）的去除能力，最高可达130克/（立方米·小时）（反应器）。在分批实验中证实了生物滤池中由于高生物量生长导致的传质限制。观察到了细菌污染，但在生物滤池和使用选择性抑制剂及控制pH值的分批反应器中的实验证实了真菌的主要作用。结果表明，真菌生物滤池可以成为处理疏水性化合物的传统减排技术的有效替代方案。
