Nitrogen removal performance and microbial community changes in subsurface wastewater infiltration systems (SWISs) at low temperature with different bioaugmentation strategies. (February 2018)

• Record Type: Journal Article
• Authors: Liu, Chunjing; Xie, Jianzhi; Song, Manli; Gao, Zhiling; Zheng, Dongxing; Liu, Xia; Ning, Guohui; Cheng, Xu; Bruning, Harry
• Is Part Of: Bioresource technology. Volume 250(2018)
• Page Start: 603
• Page End: 610
• Publication Date: 2018-02
• Subjects: Subsurface wastewater infiltration system -- Aerobic denitrification -- Embedding bioaugmentation -- Low temperature -- Bacterial community structure; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.11.089
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Seven psychrophs specialized on nitrogen removal isolated for bioaugmentation. embedding SWISs exhibit better nitrogen removal performance under low temperature. Embedding bioaugmentation alter bacteria community structure significantly. Abstract: 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.