Modeling an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer

Yoshihiko Inagaki, Katsuki Naito, Jian Ye, Masahito Komori, yutaka Sakakibara

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    This paper presents a mathematical model for an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer. This model was developed to investigate the stable denitrification performance of the aquifer as well as the effects of varying the molar ratio of nitrate load to hydrogen gas injection (N/H ratio) on the effluent quality in terms of nitrate and nitrite concentrations under a long-term operation. The model could fairly predict the effluent quality in terms of nitrate and nitrite concentrations in the aquifer, in response to the sudden decrease in H2 gas injection as well as different N/H ratios. Furthermore, the model clearly demonstrated that denitrification and nitrification proceeded in each zone injected with H2 gas or O2 gas, respectively, and that stable treatment can be achieved. There were some differences between the experimental data and the model results for nitrate, nitrite, dissolved oxygen, and dissolved hydrogen at the H2-injection zone, implying that mass transfer rates in biofilm should be taken into consideration for more precise modeling. A sensitivity analysis showed that effluent quality in terms of nitrate concentration was the most sensitive to changes in maximum nitrate and nitrite utilization rates.

    Original languageEnglish
    Pages (from-to)308-313
    Number of pages6
    JournalJournal of Water Process Engineering
    Volume26
    DOIs
    Publication statusPublished - 2018 Dec 1

    Fingerprint

    Denitrification
    Groundwater
    Aquifers
    Nitrates
    denitrification
    aquifer
    Nitrites
    nitrate
    oxidation
    Oxidation
    nitrite
    Gases
    modeling
    Effluents
    effluent
    gas
    Hydrogen
    Injections
    Theoretical Models
    hydrogen

    Keywords

    • Groundwater
    • In-situ hydrogenotrophic denitrification
    • Mathematical model
    • Nitrate removal

    ASJC Scopus subject areas

    • Biotechnology
    • Safety, Risk, Reliability and Quality
    • Waste Management and Disposal
    • Process Chemistry and Technology

    Cite this

    Modeling an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer. / Inagaki, Yoshihiko; Naito, Katsuki; Ye, Jian; Komori, Masahito; Sakakibara, yutaka.

    In: Journal of Water Process Engineering, Vol. 26, 01.12.2018, p. 308-313.

    Research output: Contribution to journalArticle

    @article{64913123a89840b8a22657fbd2f45f60,
    title = "Modeling an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer",
    abstract = "This paper presents a mathematical model for an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer. This model was developed to investigate the stable denitrification performance of the aquifer as well as the effects of varying the molar ratio of nitrate load to hydrogen gas injection (N/H ratio) on the effluent quality in terms of nitrate and nitrite concentrations under a long-term operation. The model could fairly predict the effluent quality in terms of nitrate and nitrite concentrations in the aquifer, in response to the sudden decrease in H2 gas injection as well as different N/H ratios. Furthermore, the model clearly demonstrated that denitrification and nitrification proceeded in each zone injected with H2 gas or O2 gas, respectively, and that stable treatment can be achieved. There were some differences between the experimental data and the model results for nitrate, nitrite, dissolved oxygen, and dissolved hydrogen at the H2-injection zone, implying that mass transfer rates in biofilm should be taken into consideration for more precise modeling. A sensitivity analysis showed that effluent quality in terms of nitrate concentration was the most sensitive to changes in maximum nitrate and nitrite utilization rates.",
    keywords = "Groundwater, In-situ hydrogenotrophic denitrification, Mathematical model, Nitrate removal",
    author = "Yoshihiko Inagaki and Katsuki Naito and Jian Ye and Masahito Komori and yutaka Sakakibara",
    year = "2018",
    month = "12",
    day = "1",
    doi = "10.1016/j.jwpe.2018.11.002",
    language = "English",
    volume = "26",
    pages = "308--313",
    journal = "Journal of Water Process Engineering",
    issn = "2214-7144",
    publisher = "Elsevier Limited",

    }

    TY - JOUR

    T1 - Modeling an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer

    AU - Inagaki, Yoshihiko

    AU - Naito, Katsuki

    AU - Ye, Jian

    AU - Komori, Masahito

    AU - Sakakibara, yutaka

    PY - 2018/12/1

    Y1 - 2018/12/1

    N2 - This paper presents a mathematical model for an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer. This model was developed to investigate the stable denitrification performance of the aquifer as well as the effects of varying the molar ratio of nitrate load to hydrogen gas injection (N/H ratio) on the effluent quality in terms of nitrate and nitrite concentrations under a long-term operation. The model could fairly predict the effluent quality in terms of nitrate and nitrite concentrations in the aquifer, in response to the sudden decrease in H2 gas injection as well as different N/H ratios. Furthermore, the model clearly demonstrated that denitrification and nitrification proceeded in each zone injected with H2 gas or O2 gas, respectively, and that stable treatment can be achieved. There were some differences between the experimental data and the model results for nitrate, nitrite, dissolved oxygen, and dissolved hydrogen at the H2-injection zone, implying that mass transfer rates in biofilm should be taken into consideration for more precise modeling. A sensitivity analysis showed that effluent quality in terms of nitrate concentration was the most sensitive to changes in maximum nitrate and nitrite utilization rates.

    AB - This paper presents a mathematical model for an in-situ hydrogenotrophic denitrification and oxidation process in an experimental scale aquifer. This model was developed to investigate the stable denitrification performance of the aquifer as well as the effects of varying the molar ratio of nitrate load to hydrogen gas injection (N/H ratio) on the effluent quality in terms of nitrate and nitrite concentrations under a long-term operation. The model could fairly predict the effluent quality in terms of nitrate and nitrite concentrations in the aquifer, in response to the sudden decrease in H2 gas injection as well as different N/H ratios. Furthermore, the model clearly demonstrated that denitrification and nitrification proceeded in each zone injected with H2 gas or O2 gas, respectively, and that stable treatment can be achieved. There were some differences between the experimental data and the model results for nitrate, nitrite, dissolved oxygen, and dissolved hydrogen at the H2-injection zone, implying that mass transfer rates in biofilm should be taken into consideration for more precise modeling. A sensitivity analysis showed that effluent quality in terms of nitrate concentration was the most sensitive to changes in maximum nitrate and nitrite utilization rates.

    KW - Groundwater

    KW - In-situ hydrogenotrophic denitrification

    KW - Mathematical model

    KW - Nitrate removal

    UR - http://www.scopus.com/inward/record.url?scp=85056240950&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85056240950&partnerID=8YFLogxK

    U2 - 10.1016/j.jwpe.2018.11.002

    DO - 10.1016/j.jwpe.2018.11.002

    M3 - Article

    AN - SCOPUS:85056240950

    VL - 26

    SP - 308

    EP - 313

    JO - Journal of Water Process Engineering

    JF - Journal of Water Process Engineering

    SN - 2214-7144

    ER -