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Effect of aeration and hydraulic loading rate on nitrogen removal by subsurface infiltration systems.

Abstract

This study investigated the effect of hydraulic loading rate (HLR) on matrix dissolved oxygen (DO), organic matter removal, nitrogen removal, N2 O emissions, and the abundances of functional genes participating in nitrogen removal in intermittent aerated mode (IAM) and nonaerated mode (NAM) subsurface infiltration systems (SISs). In contrast to NAM SISs, IAM SISs were able to create aerobic conditions in the upper matrix (above 50 cm depth) and anoxic or anaerobic conditions in the lower matrix (below 80 cm depth). Subsequently, this enhanced the abundance of functional genes related to nitrogen removal. Chemical oxygen demand (COD) and nitrogen removal performance were significantly higher under IAM SISs than with NAM SISs. Under a HLR of 0.3 m3 /(m2 d), the IAM SIS was able to achieve low N2 O emissions (12.6 mg/[m2 d]) along with removal efficiencies of 90.5%, 91.4%, and 85.7% for COD, ammonia nitrogen (NH 4 + -N), and total nitrogen (TN), respectively. PRACTITIONER POINTS: Intermittent aeration successfully realized sequential aerobic and anaerobic conditions at 50 cm depth and at 80 and 110 cm depths of a subsurface infiltration system. Intermittent aeration reduced N2 O emissions and improved hydraulic loading rate and organic matter, nitrogen removal efficiencies. Intermittent aeration enhanced the abundances of amoA, nxrA, napA, narG, nirS, nirK, qnorB, and nosZ.

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  • Authors+Show Affiliations

    ,

    College of Life Science, Shenyang Normal University, Shenyang, China.

    ,

    College of Life Science, Shenyang Normal University, Shenyang, China.

    ,

    College of Life Science, Shenyang Normal University, Shenyang, China.

    ,

    College of Life Science, Shenyang Normal University, Shenyang, China.

    ,

    College of Life Science, Shenyang Normal University, Shenyang, China.

    College of Life Science, Shenyang Normal University, Shenyang, China.

    Source

    MeSH

    Air
    Bacterial Proteins
    Biological Oxygen Demand Analysis
    Bioreactors
    Filtration
    Nitrogen
    Surface Properties
    Waste Disposal, Fluid

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    30784134

    Citation

    Zheng, Fanping, et al. "Effect of Aeration and Hydraulic Loading Rate On Nitrogen Removal By Subsurface Infiltration Systems." Water Environment Research : a Research Publication of the Water Environment Federation, vol. 91, no. 5, 2019, pp. 399-406.
    Zheng F, Huang L, Pan J, et al. Effect of aeration and hydraulic loading rate on nitrogen removal by subsurface infiltration systems. Water Environ Res. 2019;91(5):399-406.
    Zheng, F., Huang, L., Pan, J., Qi, S., Tan, C., & Xiao, L. (2019). Effect of aeration and hydraulic loading rate on nitrogen removal by subsurface infiltration systems. Water Environment Research : a Research Publication of the Water Environment Federation, 91(5), pp. 399-406. doi:10.1002/wer.1030.
    Zheng F, et al. Effect of Aeration and Hydraulic Loading Rate On Nitrogen Removal By Subsurface Infiltration Systems. Water Environ Res. 2019;91(5):399-406. PubMed PMID: 30784134.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Effect of aeration and hydraulic loading rate on nitrogen removal by subsurface infiltration systems. AU - Zheng,Fanping, AU - Huang,Linli, AU - Pan,Jing, AU - Qi,Shiyue, AU - Tan,Chaoquan, AU - Xiao,Lu, Y1 - 2019/02/19/ PY - 2018/07/15/received PY - 2018/09/29/revised PY - 2018/10/19/accepted PY - 2019/2/21/pubmed PY - 2019/2/21/medline PY - 2019/2/21/entrez KW - N2O KW - hydraulic surface loading KW - intermittent aeration KW - nitrogen KW - subsurface infiltration system SP - 399 EP - 406 JF - Water environment research : a research publication of the Water Environment Federation JO - Water Environ. Res. VL - 91 IS - 5 N2 - This study investigated the effect of hydraulic loading rate (HLR) on matrix dissolved oxygen (DO), organic matter removal, nitrogen removal, N2 O emissions, and the abundances of functional genes participating in nitrogen removal in intermittent aerated mode (IAM) and nonaerated mode (NAM) subsurface infiltration systems (SISs). In contrast to NAM SISs, IAM SISs were able to create aerobic conditions in the upper matrix (above 50 cm depth) and anoxic or anaerobic conditions in the lower matrix (below 80 cm depth). Subsequently, this enhanced the abundance of functional genes related to nitrogen removal. Chemical oxygen demand (COD) and nitrogen removal performance were significantly higher under IAM SISs than with NAM SISs. Under a HLR of 0.3 m3 /(m2 d), the IAM SIS was able to achieve low N2 O emissions (12.6 mg/[m2 d]) along with removal efficiencies of 90.5%, 91.4%, and 85.7% for COD, ammonia nitrogen (NH 4 + -N), and total nitrogen (TN), respectively. PRACTITIONER POINTS: Intermittent aeration successfully realized sequential aerobic and anaerobic conditions at 50 cm depth and at 80 and 110 cm depths of a subsurface infiltration system. Intermittent aeration reduced N2 O emissions and improved hydraulic loading rate and organic matter, nitrogen removal efficiencies. Intermittent aeration enhanced the abundances of amoA, nxrA, napA, narG, nirS, nirK, qnorB, and nosZ. SN - 1061-4303 UR - https://www.unboundmedicine.com/medline/citation/30784134/Effect_of_aeration_and_hydraulic_loading_rate_on_nitrogen_removal_by_subsurface_infiltration_systems L2 - https://doi.org/10.1002/wer.1030 DB - PRIME DP - Unbound Medicine ER -