TY - JOUR
T1 - Nitrogen removal performance and microbial community changes in subsurface wastewater infiltration systems (SWISs) at low temperature with different bioaugmentation strategies
AU - Liu, Chunjing
AU - Xie, Jianzhi
AU - Song, Manli
AU - Gao, Zhiling
AU - Zheng, Dongxing
AU - Liu, Xia
AU - Ning, Guohui
AU - Cheng, Xu
AU - Bruning, Harry
PY - 2018/2/1
Y1 - 2018/2/1
N2 - Poor nitrogen removal efficiency (mainly nitrate, NO3 −-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 NO3 −-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 (p <.05) and altered the bacterial community structure, significantly increasing the relative abundance of Clostridia, which have good nitrate-reducing activity.
AB - Poor nitrogen removal efficiency (mainly nitrate, NO3 −-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 NO3 −-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 (p <.05) and altered the bacterial community structure, significantly increasing the relative abundance of Clostridia, which have good nitrate-reducing activity.
KW - Aerobic denitrification
KW - Bacterial community structure
KW - Embedding bioaugmentation
KW - Low temperature
KW - Subsurface wastewater infiltration system
U2 - 10.1016/j.biortech.2017.11.089
DO - 10.1016/j.biortech.2017.11.089
M3 - Article
AN - SCOPUS:85036539666
SN - 0960-8524
VL - 250
SP - 603
EP - 610
JO - Bioresource Technology
JF - Bioresource Technology
ER -
