International Conference on Manufacturing Technology, Materials and Chemical Engineering | |
Shortcut Nitrification and Denitrification in MBBR controlled by Inhibitor | |
机械制造;材料科学;化学工业 | |
Liu, Yan^1 ; Shen, Jianxin^1 ; Lian, Xiang^1 ; Li, Na^1 ; Li, Guode^1 | |
Experimental Center of Shenyang Normal University, Liaoning Shenyang | |
110034, China^1 | |
关键词: Methanoic acid; Multi factors; Nitrite accumulation; Short-cut nitrification and denitrifications; Shortcut nitrification; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/392/3/032028/pdf DOI : 10.1088/1757-899X/392/3/032028 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
Multi-factor influence on shortcut nitrification in MBBR when dosing methanoic acid-hydrazine2 was studied in this paper. The results showed that, when the influent ammonia was 30 mg/L and pH was 7.5∼8.5, the average nitrite accumulation rate of the reactor without inhibitor (reactor one) and the reactor dosing methanoic acid-hydrazine2 (reactor two) were respectively 80.2% and 98.5%. When the influent ammonia increased to 50 mg/L, the average nitrite accumulation rate of the reactor one and reactor two were respectively 81.0% and 96.1%. When pH decreased to 6.5∼7.0 and other condition unchanged, the average nitrite accumulation rate of reactor one and reactor two were respectively 69.3% and 95.7%. When the pH of the two reactors was 7.5∼8.5 and gradually increase the influent ammonia to 300 mg/L, the average nitrite accumulation rate of reactor one and reactor two were respectively 87.7% and 98.3%. When temperature was 12∼15 °C, the average nitrite accumulation rate of reactor one and reactor two were respectively 72.4% and 96.9%. From the experimental results, we can see that the realization of shortcut nitrification was the result of multi-factor interaction, the change of each factor affects the realization of shortcut nitrification. However, by adding methanoic acid-hydrazine2 combined inhibitor in the reactor could reduce the effect on nitrite accumulation when parameters changed in the system and maintain the relatively stable shortcut nitrification.
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