Center for Environmental Engineering Research and Education (CEERE) and Department of Civil Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB, Canada.
CSIR-National Environmental Engineering Research Institute (CSIR-NEERI), Nehru Marg, Nagpur 440 020, India.
Bioresour Technol. 2017 Sep;239:219-225. doi: 10.1016/j.biortech.2017.05.009. Epub 2017 May 4.
Aiming to improve conventional methane biofilter performance, a multiple-level aeration biofilter design is proposed. Laboratory flow-through column experiments were conducted to evaluate three actively-aerated methane biofilter configurations. Columns were aerated at one, two, and three levels of the bed depth, with air introduced at flow rates calculated from methane oxidation reaction stoichiometry. Inlet methane loading rates were increased in five stages between 6 and 18mL/min. The effects of methane feeding rate, levels of aeration, and residence time on methane oxidation rates were determined. Samples collected after completion of flow-through experiments were used to determine methane oxidation kinetic parameters, V, K, and methanotrophic community distribution across biofilter columns. Results obtained from mixed variances analysis and response surfaces, as well as methanotrophic activity data, suggested that, biofilter column with two aeration levels has the most even performance over time, maintaining 85.1% average oxidation efficiency over 95days of experiments.
为了提高传统甲烷生物滤池的性能，提出了一种多级曝气生物滤池设计。进行了实验室流动柱实验，以评估三种主动曝气甲烷生物滤池的配置。在床深的一个、两个和三个水平上对柱进行曝气，空气以根据甲烷氧化反应化学计量计算的流速引入。在 6 到 18mL/min 之间的五个阶段增加了入口甲烷负荷率。确定了甲烷进料率、曝气水平和停留时间对甲烷氧化速率的影响。在完成流动实验后收集的样品用于确定甲烷氧化动力学参数、V、K 和生物滤池柱中甲烷营养菌群落的分布。混合方差分析和响应面以及甲烷营养菌活性数据的结果表明，具有两个曝气水平的生物滤池柱在整个实验过程中的性能最均匀，在 95 天的实验中保持 85.1%的平均氧化效率。
