氢自养反硝化去除水中硝酸盐的影响因素研究  

Study on Affecting Factors of Nitrate Removal from Water by Hydrogen Autotrophic Denitrification

作　　者：夏四清[1] 钟佛华[1] 张彦浩[1,2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]山东建筑大学市政与环境工程学院,山东济南250101

出　　处：《中国给水排水》2008年第21期5-8,共4页China Water & Wastewater

基　　金：国际科技合作项目(2007DFR90050);教育部新世纪优秀人才支持计划项目(NCET-05-0387);世博专项(07DZ05814)

摘　　要：研究了氢自养反硝化细菌在不同条件下的反硝化性能,结果表明:反硝化的适宜温度为30～40℃,35℃时的效果最佳;pH值为7.7～8.2时对硝酸盐的降解速率最快,随着pH值的升高,逐渐产生亚硝酸盐的积累,pH<6.3或pH>9.2时反硝化基本停滞;当硝酸盐<100mg/L时,反应24h后对总氮的去除率>95%,而当硝酸盐>120mg/L时则会抑制反硝化过程;此外,随着硝酸盐的降解,菌体浓度和pH值都呈缓慢上升趋势。The performance of hydrogen autotrophic denitrification bacteria was tested under different conditions. It is found that the denitrification is suitable when temperature is at 30 to 40 ℃, with the best efficiency at 35 ℃. The fastest degradation rate of nitrate is achieved when pH is 7.7 to 8.2. As pH increases, nitrite gradually accumulates, and the denitrification is strongly restrained when pH is less than 6.3 or more than 9.2. When the nitrate concentration is less than 100 mg/L, the removal rate of to- tal nitrogen is more than 95% after 24 hours. When the nitrate concentration is more than 120 mg/L, the denitrification is inhibited. In addition, with the degradation of nitrate, the cell concentration and pH value slowly increase.

关 键 词：氢自养反硝化 硝酸盐 亚硝酸盐 反硝化 

分 类 号：X523[环境科学与工程—环境工程]