Effects of multiple factors on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron
SONG Ge1, ZHANG Wen-jing1,2,3, BI Zhen1,2,3, HUANG Yong1,2,3, DONG Shi-yu1,3
1. School of Environment Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, China; 2. National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, Suzhou 215009, China; 3. Institute of Environmental Biotechnology, Suzhou University of Science and Technology, Suzhou 215009, China
Abstract：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-Fe0 addition 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%.
宋歌, 张文静, 毕贞, 黄勇, 董石语. 多因素对ANAMMOX菌利用零价铁还原硝酸盐过程影响[J]. 中国环境科学, 2019, 39(11): 4666-4672.
SONG Ge, ZHANG Wen-jing, BI Zhen, HUANG Yong, DONG Shi-yu. Effects of multiple factors on the process of ANAMMOX bacteria strengthening nitrate reduction by zero-valent iron. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4666-4672.
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