| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7068769 | Bioresource Technology | 2018 | 31 Pages |
Abstract
Poor nitrogen removal efficiency (mainly nitrate, NO3â-N) at low temperatures strongly limits application of subsurface wastewater infiltration systems (SWISs). Seven psychrophilic strains (heterotrophic nitrifying bacteria and aerobic denitrifying bacteria) were isolated and added to SWISs to investigate the effect of embedding and direct-dosing bioaugmentation strategies on sewage treatment performance at low temperature. Both bioaugmentation strategies improved ammonium (NH4+-N) removal efficiencies, and the embedding strategy also exhibited satisfactory NO3â-N and total nitrogen (TN) removal efficiencies. Pyrosequencing results of the bacterial 16S rRNA gene indicated that the embedding strategy significantly decreased the indigenous soil microbial diversity (pâ¯<â¯.05) and altered the bacterial community structure, significantly increasing the relative abundance of Clostridia, which have good nitrate-reducing activity.
Keywords
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Process Chemistry and Technology
Authors
Chunjing Liu, Jianzhi Xie, Manli Song, Zhiling Gao, Dongxing Zheng, Xia Liu, Guohui Ning, Xu Cheng, Harry Bruning,