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| Effect of nanoscale zero-valent iron on the denitrification performance of anaerobic ammonia oxidation |
| MA Jiao1,2,3, ZENG Tian-xu1,2,3, SONG Jun4, DANG Hong-zhong1,2,3, LI Wei-wei1,2,3,5, CHEN Yong-zhi1,2,3 |
1. Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
3. Technical Center of Sewage Treatment Industry in Gansu Province, Lanzhou 730070, China;
4. Development and Reform Ministry of China State Railway Group Co., Ltd, Beijing 100844, China;
5. Gansu Research Institute of Light Industry Co., Ltd, Lanzhou 730070, China |
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Abstract The effect of nanoscale zero-valent iron (nZVI) powder on the denitrification performance of anaerobic ammonia oxidation (ANAMMOX) reaction was investigated by adding nZVI into ASBR. When the concentrations of nZVI were 0, 10, 50, 100, 200, 500, and 1000mg/L at the temperatures of (25±0.5)℃, and the pH value of 7.5±0.5, the total nitrogen removal efficiencies (NRE) were 70.27%, 74.25%, 83.45%, 90.16%, 68.59%, 57.18%, and 50.93% under the influent NH4+-N and NO2--N concentrations of 30.35mg/L and 37.89mg/L, respectively. The kinetic analysis was carried out by the modified Boltzmann, Gompertz, and Logistic models,the R2 values were 0.9963, 0.9944, and 0.9851, respectively. The mean square errors of the effluent concentration of total nitrogen (TN) and NRE compared with the actual values were 2.13, 6.31, 8.48, and 6.93, 7.47, 10.95, respectively.Key words:nZVI;ANAMMOX;nitrogen removal efficiency;kineticmodels
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Received: 12 November 2021
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