An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal.
An efficient process for wastewater treatment to mitigate free nitrous acid generation and its inhibition on biological phosphorus removal.
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减少游离亚硝酸生成及其对生物除磷的抑制作用的有效废水处理工艺
DOI：
10.1038/srep08602
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发表时间：
2015-02-27
影响因子：
4.6
通讯作者：
Zeng G
中科院分区：
文献类型：
--
作者：
Zhao J;Wang D;Li X;Yang Q;Chen H;Zhong Y;An H;Zeng G
游离亚硝酸(FNA)是亚硝酸盐的质子化形式，在生物脱氮过程中不可避免地产生，它对聚磷菌(PAO)的活性有强烈的抑制作用。在此，我们报道了一种有效的废水处理工艺，即好氧/缺氧/好氧/长时间闲置工艺，以减少FNA的产生及其对PAO的抑制。结果表明，与传统的四段(厌氧/好氧/缺氧/好氧)生物除磷工艺相比，该新工艺富集了更多的聚磷菌，从而获得了更高的除磷效率(聚磷菌丰度分别为41±7%和30±5%，除磷效率分别为97±0.73%和82±1.2%)。研究发现，该新工艺提高了pH值，但减少了亚硝酸盐的积累，导致FNA的生成减少。进一步的实验表明，即使在相同的FNA浓度下，新工艺也可以缓解FNA对PAO代谢的抑制。
Free nitrous acid (FNA), which is the protonated form of nitrite and inevitably produced during biological nitrogen removal, has been demonstrated to strongly inhibit the activity of polyphosphate accumulating organisms (PAOs). Herein we reported an efficient process for wastewater treatment, i.e., the oxic/anoxic/oxic/extended-idle process to mitigate the generation of FNA and its inhibition on PAOs. The results showed that this new process enriched more PAOs which thereby achieved higher phosphorus removal efficiency than the conventional four-step (i.e., anaerobic/oxic/anoxic/oxic) biological nutrient removal process (41 ± 7% versus 30 ± 5% in abundance of PAOs and 97 ± 0.73% versus 82 ± 1.2% in efficiency of phosphorus removal). It was found that this new process increased pH value but decreased nitrite accumulation, resulting in the decreased FNA generation. Further experiments showed that the new process could alleviate the inhibition of FNA on the metabolisms of PAOs even under the same FNA concentration.
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影响因子：
12.8
作者：
Pijuan, Maite;Ye, Liu;Yuan, Zhiguo
通讯作者：
Yuan, Zhiguo
影响因子：
12.8
作者：
Marcelino, Marcos;Guisasola, Albert;Antonio Baeza, Juan
通讯作者：
Antonio Baeza, Juan
影响因子：
3.8
作者：
Oehmen, A;Zeng, RJ;Keller, J
通讯作者：
Keller, J
影响因子：
4.4
作者：
Uygur, A
通讯作者：
Uygur, A
影响因子：
3.8
作者：
SMOLDERS, GJF;VANDERMEIJ, J;HEIJNEN, JJ
通讯作者：
HEIJNEN, JJ