甲苯生物降解生物滤池稳态稳定性的实验与数值研究。
Experimental and numerical study of steady state stability in a toluene biodegrading biofilter.
机构信息
Department of Chemical and Petroleum Engineering, and Centre for Environmental Engineering Research and Education (CEERE), Schulich School of Engineering, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1N4, Canada.
Department of Chemical and Materials Engineering, Gina Cody School of Engineering and Computer Science, Concordia University, 1455 De Maisonneuve Blvd. W, Montreal, QC, Canada.
出版信息
Sci Rep. 2022 Jul 22;12(1):12510. doi: 10.1038/s41598-022-15620-w.
Different steady states in a toluene biodegrading biofilter were explored experimentally and numerically. Experimental results showed that a gradual increase of the toluene inlet concentration over several weeks leads to a consistently low exit concentration, with a drastic increase at an inlet concentration change from 7.7 to 8.5 g m, indicating an alteration in steady state. A significant and sudden drop in the removal efficiency from 88 to 46% was observed. A model that includes nitrogen and biomass dynamics predicted results matching the experimental biofilter performance well, but the timing of the concentration jump was not reproduced exactly. A model that assumes a gradual increase of toluene inlet concentration of 0.272 g m per day, accurately reproduced the experimental relationship between inlet and outlet concentration. Although there was variation between experimental and simulated results, a clear confirmation of the jump from one steady state to another was found.
实验和数值研究探索了甲苯降解生物滤池中的不同稳态。实验结果表明，在几周的时间内逐渐提高甲苯入口浓度会导致出口浓度持续降低，但当入口浓度从 7.7 增加到 8.5 g/m³时，浓度会急剧上升，表明稳态发生了变化。去除效率从 88%显著且突然下降到 46%。一个包含氮和生物质动态的模型预测结果与实验生物滤池性能非常吻合，但浓度跳跃的时间点没有被准确再现。一个假设甲苯入口浓度每天逐渐增加 0.272 g/m³的模型，准确地再现了实验中入口和出口浓度之间的关系。尽管实验和模拟结果之间存在差异，但还是清楚地证实了从一个稳态到另一个稳态的跳跃。
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