亚硝基单胞菌
亚硝酸
硝基螺
欧洲亚硝基单胞菌
化学
亚硝酸盐
氨
硝化作用
动力学
环境化学
微生物种群生物学
生物化学
食品科学
氮气
无机化学
生物
细菌
硝酸盐
有机化学
物理
量子力学
遗传学
作者
Yucan Liu,Yuliang Zhu,Daishun Wu,Zhaoyang Wang,Yajun Wang,Gang Wang,Xin Zhou,Hongwei Sun
标识
DOI:10.1016/j.biortech.2023.128595
摘要
This work comprehensively deciphered the effect of free nitrous acid (FNA) on the microbial community, inhibitory kinetics, and nitrifiers in nitritation process. Nitritation was first successfully achieved through selective inhibition of free ammonia (FA) on nitrite oxidizers (NOB). Then, batch tests clearly showed that FNA significantly inhibits the ammonia oxidation rate (rsu) and the growth rate (μ) of ammonia oxidizers (AOB), which was well described by the Hellinga model (KI = 0.222 mg·L-1). The structural equation model indicated that FNA was significantly and negatively associated with rsu, μ, Nitrosomonas, Commamons, Nitrospira, and Nitrotoga and positively correlated with Paracoccus. Furthermore, Nitrosomonas significantly drove the ammonia utilization and growth of AOB and was identified as the most important functional biomarker indicating the nitritation in response to FNA levels using random forest model. This study provides helpful information on the kinetics of the mechanism underlying the FNA inhibition on nitrification.
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