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Updated: Feb 28, 2026

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Nitrogen removal and nitrogen functional gene abundances in three subsurface wastewater infiltration systems under
Jing Pan1, Shiyue Qi1, Yafei Sun1
1College of Life Science, Shenyang Normal University, Shenyang 110034, China.
Abstract:
Matrix DO, nitrogen removal and nitrogen functional gene abundances in non-aerated (NA), continuously aerated (CA) and intermittently aerated (IA) subsurface wastewater infiltration systems (SWISs) under different influent C/N ratios were studied. Aeration created aerobic condition in 50cm depth and did not change anoxic or anaerobic condition in 80 and 110cm depths, which enhanced NH4+-N and TN removal and the enrichment of nitrogen removal functional genes (amoA, nxrA, narG, napA, nirK, nirS, qnorB and nosZ) compared to NA SWIS, especially under high influent C/N ratio. High TN removal rate (89.6%) was obtained in IA SWIS under the influent C/N ratio of 12, which was higher than that in CA SWIS (87.1%). The results suggested that intermittent aeration was a reliable option to achieve high TN removal in SWISs, especially under high influent C/N ratio.
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