氮元素降解随流速的变化规律研究  

Study on changing law of nitrogen degradation along with flow velocity

作　　者：杜欢欢[1,2] 黄本胜[1,2] 邱静[1,2] 洪昌红 杨清书[2,3] 

机构地区：[1]广东省水利水电科学研究院,广东广州510635 [2]河口水利国家地方联合工程实验室,广东广州510635 [3]中山大学,广东广州510275

出　　处：《水利水电技术》2015年第12期48-52,共5页Water Resources and Hydropower Engineering

基　　金：广东省水利科技创新项目(2009-24);广东省水利科技创新项目(2011-06)

摘　　要：本文介绍了采用循环环境水槽试验对流速对氮元素降解过程的影响进行的研究。研究中,分别监测了不同流速条件下水体的氨氮、硝酸盐(NO_3^--N)、亚硝酸盐(NO_2^--N)浓度随时间的变化过程,并分析了pH随流速变化对氮元素主要降解过程的影响。结果表明:实验水体pH主要受氮元素迁移转化的影响,其值的变化与氨氮、硝酸盐(NO_3^--N)、亚硝酸盐(NO_2^--N)的浓度变化显著性相关,其与流速同样关系紧密,无论是氨化反应占主导阶段,还是硝化、反硝化反应占主导的阶段,均是流速越大,pH越高。The study made on the effect from flow velocity on the nitrogen degradation process with the experiment of circulating water flume is described herein. In the study, the time dependent changing processes of the concentrations of ammonia nitrogen, nitrate and nitrite in water under the conditions of various flow velocities are respectively monitored, and then the effect from the change of pH value along with flow velocity on the main degradation process of nitrogen element is analyzed as well. The result shows that the pH in the water for the experiment is mainly impacted by the migration and transformation of nitrogen element, the change of its value is significantly related to the concentrations of ammonia nitrogen, nitrate and nitrite, and then it also has a closed relation with flow velocity; i.e. no matter in the phase that the ammonification reaction is dominated, or in the phase that nitrification, denitrification reactions are dominated, the larger the flow velocity is, the higher the pH value is to be.

关 键 词：流速 氨氮 NO3^--N NO2^--N PH 

分 类 号：X52[环境科学与工程—环境工程]