多因素对ANAMMOX菌利用零价铁还原硝酸盐过程影响  

Effects of multiple factors on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron

作　　者：宋歌 张文静[1,2,3] 毕贞 黄勇 董石语[1,3] SONG Ge;ZHANG Wen-jing;BI Zhen;HUANG Yong;DONG Shi-yu(School of Environment Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,Suzhou 215009,China;Institute of Environmental Biotechnology,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]苏州科技大学环境科学与工程学院,江苏苏州215009 [2]城市生活污水资源化利用技术国家地方联合工程实验室,江苏苏州215009 [3]苏州科技大学环境生物技术研究所,江苏苏州215009

出　　处：《中国环境科学》2019年第11期4666-4672,共7页China Environmental Science

基　　金：国家自然科学基金资助项目(21607110);城市生活污水资源化利用技术国家地方联合工程实验室(苏州科技大学)开放课题(2018KF02);苏州科技大学大学生科研立项基金资助项目(无项目编号)

摘　　要：以厌氧氨氧化(ANAMMOX)菌利用零价铁还原硝酸盐体系为研究对象,采用单因素调控法结合中心复合法(CCD)系统研究铁形态、进水pH值、温度、Fe/N等对该体系中硝酸盐去除率的影响.结果表明,在相同的反应条件下,投加纳米铁时ANAMMOX体系中硝酸盐的去除效果最优;反应温度和Fe/N对体系中硝酸盐去除率影响十分显著,而进水pH值影响较弱.利用CCD法得出模型预测的最佳反应条件为:进水pH值为4.00,反应温度为35.00℃,Fe/N为38.23,预测的硝酸盐去除率为94.70%,实际实验得出的硝酸盐去除率为88.99%.Effects of iron form,pH,temperature and Fe/N on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron(Fe0)were studied by single factor control experiment combined with Central Composite Design(CCD)methodology.The results demonstrated that the test with nano-Fe0addition showed the highest nitrate removal efficiency compared with the iron powder and iron filings addition.According to the CCD analysis,the temperature and Fe/N had significant effects on the nitrate removal efficiency,while the effect of pH was weak.The optimum reaction conditions predicted based on CCD analysis were initial pH of 4.00,temperature of 35.00℃,and Fe/N of 38.23.The predictive nitrate removal efficiency was 94.70%,which was closed to the actual experimental value of 88.99%.

关 键 词：厌氧氨氧化(ANAMMOX) 硝酸盐 零价铁 中心复合(CCD)法 

分 类 号：X703.1[环境科学与工程—环境工程]