利用不同碳源包埋反硝化菌去除地下水中硝酸盐  

Study on the Removal of Nitrate from Groundwater Using Different Carbon Source for the Embedded Denitrifying Bacteria

作　　者：李军[1] 张淑亚[1] 冯雷[2] 姚松涛[1] 杨双[3] 

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]沈阳建筑大学建设项目管理公司,辽宁沈阳110168 [3]沈阳市农业科学院,辽宁沈阳110034

出　　处：《沈阳建筑大学学报（自然科学版）》2011年第5期962-967,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(50708058);辽宁省"百千万人才工程"资助项目(2009921098);沈阳市科技计划项目(F10-136-9-00);辽宁省教育厅高等学校科研项目(2009B151)

摘　　要：目的比较乙酸钠(NaAc)(液相)和稻秆(固相)作为碳源的包埋反硝化菌反硝化性能,确定固相碳源反硝化过程的工艺条件.方法自配水样,采用自制厌氧反应器,利用NaAc作为碳源实现反硝化的启动并探讨其反硝化性能;通过试验研究固相碳源反硝化过程的影响因素.结果以NaAc为碳源,停留时间为6 h、进水pH在7～7.5时,NO 3--N去除率接近100%,且出水没有NO 2--N的积累,NO 3--N最大处理负荷87 mg.(L.h)-1,出水pH在8～8.5;以稻秆为碳源,温度20℃,停留时间6.3 h时,NO 3--N去除率达98%,基本没有NO 2--N积累,且出水pH呈中性.结论以NaAc作为碳源包埋菌对NO 3--N处理负荷较大;稻秆具有缓释碳源的性能,且降解出一定的有机酸,可中和反硝化生成的出水碱度.The experiment chose the up-flow anaerobic reactor filled with the embedded denitrifying bacteri- a, self-equipped NO3- -N water as influent. The start-up of denitrification reactor using the sodium acetate as the carbon source and impact of various factors on denitrification process using rice straws as the solid car- bon source were studied. The results show that when using the sodium acetate as the carbon source, 6 h of hydraulic retention time（HRT） ,7-7.5 of pH, 100% of nitrate could be removed, nitrite of the effluent was not detected, the influent loading of NOr -N could reach 87 mg. （ L. h） ^- 1, however, pH of the effluent in- creased to 8-8.5 ;when using rice straws as the solid carbon source,6 h of HRT,4. 5-10. 5 of pH,20℃of temperature,98% of nitrate could be removed,the NO2 -N did not accumulated,pH of the effluent was al- ways 7-8. The result shows the nitrate was removed when rice straw is as solid carbon, moreover the process has a great ability of acid and alkali resistance.

关 键 词：包埋反硝化菌 反硝化 碳源 稻杆 

分 类 号：X523[环境科学与工程—环境工程]