Nitrification performance of high rate nitrifying trickling filters at low ammonia concentrations: does the aspect ratio matter?

Lei Mai, Yu Lian, Ben van den Akker, Howard J. Fallowfield

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    Nitrifying trickling filters (NTFs) are often introduced to pre-treat waters before chlorination process, to reduce the ammonia-driven chlorine consumption in wastewater treatment. As a passive aerated system, the only power needed is to transport the water to the top of the filter for distribution. Thus, understanding the role of filter aspect ratio on ammonia oxidation might save energy cost. In the present study, a pilot-scale comparison NTF system was conducted on two filters with different aspect ratios (height/diameter) and the same specific surface area. The nitrification efficiencies of these two filters under relatively low influent ammonia-nitrogen concentrations (1.0–4.0 mg NH4-N L−1) were investigated. Results obtained from the present study indicated that the constructional aspect ratio of NTF showed no significant effect on nitrification performance of NTFs. Additionally, the operational parameters showed similar effects on nitrification in NTFs with different aspect ratios. Our findings could provide important information for the construction design of future NTFs.

    Original languageEnglish
    Pages (from-to)20520-20529
    Number of pages10
    JournalENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
    Volume26
    Issue number20
    DOIs
    Publication statusPublished - 17 May 2019

    Keywords

    • Ammonia
    • Aspect ratio
    • Biomass
    • Nitrification
    • Nitrifying trickling filters (NTFs)
    • Wastewater treatment

    Fingerprint Dive into the research topics of 'Nitrification performance of high rate nitrifying trickling filters at low ammonia concentrations: does the aspect ratio matter?'. Together they form a unique fingerprint.

  • Cite this