生物滴滤塔净化甲基叔丁基醚废气的研究

Treatment of the Waste Gas Containing Methyl tert-Butyl Ether via a Biotrickling Filter

应用生物滴滤塔处理甲基叔丁基醚废气,研究其挂膜启动及稳定运行阶段的降解性能,并考察了稳定期该系统的生物群落结构.结果表明,生物滴滤塔在停留时间为60 s,进气质量浓度为100 mg·m^(-3)的条件下,运行23 d后完成挂膜,填料上的生物量明显增加,去除率可维持在70%以上.反应器稳定运行时,去除负荷可达13.47 g·(m3·h)^(-1),矿化率可达68%;用Haldane模型拟合生物滴滤塔中去除负荷的变化趋势,获得理论ECmax为21.03 g·(m3·h)^(-1),KS为0.16 g·m^(-3),KI为0.99g·m^(-3).运用高通量测序技术分析生物膜中的微生物群落结构,发现其中优势菌属为Methylibium sp.和Blastocatella sp.,分别占11.33%和9.95%.

The performance and microbial communities of methyl tert-butyl ether（ MTBE） treatment using a biotrickling filter（ BTF）that was inoculated with activated sewage sludge were investigated. The BTF successfully started up within 23 days when the inlet concentration of MTBE was 100 mg·m^（-3） and empty bed retention time was 60 s,with 70% removal efficiency（ RE）. Under steadystate conditions, an elimination capacity（ EC） and a mineralization ratio of 13. 47 g·（ m3·h）^（-1） and 68% were achieved,respectively. The ECmaxwas 21. 03 g·（ m3·h）^（-1） according to the Haldane model,and a KSof 0. 16 g·m^（-3） and KIof 0. 99 g·m^（-3） were obtained. High-throughput sequencing was used to identify the community structure of the mixed microbial consortium in the BTF. The results indicated that Methylibium sp.（ 11. 33%） and Blastocatella sp.（ 9. 95%） were the dominant bacteria.