反硝化细菌
好氧反硝化
异养
反硝化
硝化作用
铵
亚硝酸盐
环境化学
硝酸盐
化学
细菌
假单胞菌
氮气
拉伤
食品科学
生物
硝化细菌
微生物学
有机化学
解剖
遗传学
作者
Mingxia Zhang,Anzhang Li,Qing Yao,Qingping Wu,Honghui Zhu
标识
DOI:10.1016/j.biortech.2019.122626
摘要
A heterotrophic nitrifying-aerobic denitrifying bacterium isolated from deep-sea sediment was identified as Pseudomonas bauzanensis DN13-1. Nitrogen (N) removal capability and relative expression of nitrification and denitrification genes of this strain were investigated. The NO2−-N, NO3−-N and NH4+-N removal efficiencies were 98.82%, 65.87% and 98.89%, respectively, and strain DN13-1 could efficiently remove mixed N. Meanwhile, other inorganic N was not accumulated during these N removal processes. Genomic analysis indicated that genes nirS, norB, nosZ, nasA and putative amo were identified. The relative expression of functional genes by real-time PCR (qPCR) further confirmed nitrite, nitrate and ammonium removal pathways of strain DN13-1 under aerobic condition. Especially, the ammonium removal pathway of this strain was achieved through heterotrophic ammonium nitrification coupled with fast nitrite denitrification directly. Taken together, strain DN13-1 possesses particularity to efficiently remove N, which guarantees its promising application in aquaculture wastewater treatment.
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