Exploring naphthalene vapor biofiltration: performance and microbial community dynamics with diverse inoculums
IF 2.8
4区 生物学
Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Jessica San Martín‐Davison, Raquel Lebrero, Christian Vergara‐Ojeda, Felipe Scott, Cesar Huiliñir, Alberto Vergara‐Fernández
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Abstract
BackgroundNaphthalene is a polycyclic aromatic hydrocarbon, highly dangerous for human health. It is produced as a byproduct of incomplete combustion of organic material and is frequently present in the air. Biofilters offer an effective alternative for its treatment. The aim of this work was to study the treatment of naphthalene vapors through biofiltration using two biofilters: one inoculated with a consortium composed of Fusarium solani and Rhodococcus erythropolis (BF1), and the other inoculated with a consortium of microbial isolates obtained from a previous biofilter eliminating naphthalene vapors.ResultsThe results demonstrate that inoculating a biofilter with a reconstructed consortium of microbial isolates from a naphthalene vapor‐eliminating biofilter allowed a reduction of the startup time from 35 to 5 days, while maintaining a consistent removal capacity (6 g m−3 h−1 , equivalent to 80% removal efficiency). It was also observed that the biofilter inoculated with the reconstructed consortium exhibited comparable robustness to a biofilter previously operated for 4 months with naphthalene, with a maximum removal capacity of 14 g m−3 h−1 for a naphthalene inlet load of 17 g m−3 h−1 . The study of microbial communities indicates an increase in the bacterial variability, while fungal variability remains low, with Fusarium solani being predominant at 97%.ConclusionsResults obtained during the startup of both biofilters and by challenging biofilters to increasing naphthalene concentrations or decreasing empty bed residence time showed that startup time can be reduced sevenfold by selecting the microbial consortium. An equivalent performance, in the long run, was achieved for both biofilters. © 2024 Society of Chemical Industry (SCI).
探索萘蒸气生物过滤:不同接种物的性能和微生物群落动力学
背景萘是一种多环芳烃,对人体健康危害极大。它是有机物不完全燃烧产生的副产品,经常出现在空气中。生物过滤器为其处理提供了一种有效的替代方法。这项工作的目的是研究利用两个生物过滤器通过生物过滤处理萘蒸气的方法:一个接种了由溶菌镰刀菌和红球菌组成的菌群(BF1),另一个接种了从以前消除萘蒸气的生物过滤器中获得的微生物分离菌群。结果结果表明,在生物滤池中接种从消除萘蒸气的生物滤池中分离出来的微生物重建菌群,可以将启动时间从 35 天缩短到 5 天,同时保持稳定的去除能力(6 克/立方米/小时-1,相当于 80% 的去除效率)。研究还发现,接种了重建菌群的生物滤池与之前使用萘运行了 4 个月的生物滤池具有相似的稳健性,在萘入口负荷为 17 g m-3 h-1 的情况下,最大去除能力为 14 g m-3 h-1。对微生物群落的研究表明,细菌的变异性增加了,而真菌的变异性仍然很低,主要是茄镰刀菌,占 97%。结论两种生物过滤器在启动过程中以及在萘浓度增加或空床停留时间减少的情况下对生物过滤器进行挑战所获得的结果表明,通过选择微生物群落,启动时间可以缩短七倍。从长远来看,两种生物过滤器的性能相当。© 2024 化学工业学会(SCI)。
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