硝态氮浓度对短程反硝化的反硝化速率影响研究  

Effect of nitrate nitrogen concentration on denitrification efficiency of short cut denitrification

作　　者：胡贝贝 张玉聪 万俊锋[1] HU Bei-bei;ZHANG Yu-cong;WAN Jun-feng(School of Chemical Engineering and Energy Ecology,Ecology and Environmental Research Laboratory,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化工与能源学院生态与环境研究实验室,河南郑州450001

出　　处：《应用化工》2021年第6期1468-1471,1477,共5页Applied Chemical Industry

基　　金：国家自然科学基金(21107100);河南省科技攻关计划项目(172102410031)。

摘　　要：短程反硝化的反硝化过程是将水中的硝态氮反硝化控制在亚硝态氮阶段,亚硝态氮被直接还原成氮气的过程。硝态氮是亚硝态氮积累的来源,是影响短程反硝化过程的重要因素。通过改变硝态氮浓度,研究了不同浓度条件下的亚硝态氮的积累率,以及以短程反硝化的反硝化速率。结果表明,随着硝态氮浓度增加,亚硝态氮积累率先增大后趋于稳定,反硝化速率先增大再降低后趋于稳定,硝态氮浓度影响亚硝酸根积累率从而影响反硝化速率。实验采用双Monod方程模拟其反硝化过程动力学,根据方程可以预判不同硝态氮浓度下的反硝化速率。The denitrification process of shortcut denitrification is to control the denitrification of nitrate nitrogen in water at the stage of nitrite nitrogen,which is directly reduced to nitrogen.Nitrate nitrogen is the source of nitrite nitrogen accumulation and an important factor affecting the short cut denitrification process.By changing the concentration of nitrate nitrogen,the accumulation rate of nitrite nitrogen under different concentrations and the denitrification efficiency of short cut denitrification were studied.The results showed that with the increase of nitrate concentration,the accumulation of nitrite first increased and then stabilized,and the denitrification efficiency first increased and then decreased to stabilized.The concentration of nitrate affects nitrite accumulation rate and denitrification efficiency.The kinetics of denitrification process was simulated by double Monod equation,and the denitrification efficiency under different nitrate concentration could be predicted according to the equation.

关 键 词：短程反硝化 硝态氮 亚硝态氮 反硝化速率 

分 类 号：TQ028[化学工程] TQ085