【作者】 何强； 洪毅怡晖； 皇甫小留； 朱崟莹；

【Author】 HONG Yi-yi-hui;HE Qiang;HUANGFU Xiao-liu;Zhu Yin-ying;Key Laboratory of Eco-Environment of Three Gorges Region of Ministry of Education,College of Environment and Ecology,Chongqing University;

【机构】 重庆大学城市环境与生态学院三峡库区生态环境教育部重点实验室；

【摘要】 目前预测曝气生物滤池反应过程中沿程氮物质浓度与出水氮物质浓度变化的数学模型尚不多见。本文通过加入氧化亚氮产生途径,建立适用于曝气生物滤池系统的多级硝化反硝化过程的数学模型。通过讨论反应过程的化学计量学关系式与反应动力学表达式,确定了合适的参数区间和矩阵反应方程。利用不同C/N比条件下的实验数据对模型进行了灵敏度分析、参数校正和模型验证。模型验证结果表明,C/N=2条件下,除出水NO₂^-浓度模拟值外,出水COD、NH₄⁺、NO₃^-和N₂O各自浓度模拟趋势与实测趋势基本一致,且数值之间不存在显著差异。C/N=8条件下,预测趋势与实测值结果有较好的一致性。总体而言,该模型能够对反应器中物质浓度变化进行有效模拟。更多还原

【Abstract】 The current mathematical models for predicting the evolution of the nitrogen concentration distribution with distance and the nitrogen concentration in biological aerated filter process are still rare.In this study,a mathematical model of a multistep nitrification and denitrification process applying to biological aerated filter system is established developed.It describes a multistep model by integrating the Nitrous Oxide production process,and determines the appropriate parameter intervals and the matrix reaction equation through discussing the stoichiometric relationship and the reaction kinetics.The Sensitivity,validity and applicability of the established model is demonstrated by comparing simulation results with experimental data from different C/N ratio conditions.Model validation results indicate that prediction results under C/N ratio of 2 have a good compliance with the trend of measured value,except for the results of NO₂^-,which deviate from the measured value,while simulation results under C/N ratio of 8 are all comply to the trend of the measured values.Overall,the proposed model is able to describe the change of material concentration under biological aerated filter conditions.更多还原