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    Application of an enriched marine anammox bacterium “Ca. Scalindua sp. AMX11” for nitrogen removal under moderate salinity and in the presence of organic carbon

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    Ali et al_Manuscript_Water Research_Nov 2019_KAUSTRepository.pdf
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    Type
    Article
    Authors
    Ali, Muhammad
    Shaw, Dario Rangel
    Saikaly, Pascal cc
    KAUST Department
    Environmental Science and Engineering Program
    Water Desalination and Reuse Research Center (WDRC)
    Biological and Environmental Sciences and Engineering (BESE) Division
    KAUST Grant Number
    FCC/1/1971-33-01
    Date
    2019-11-27
    Online Publication Date
    2019-11-27
    Print Publication Date
    2020-03
    Embargo End Date
    2021-11-27
    Permanent link to this record
    http://hdl.handle.net/10754/660330
    
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    Abstract
    Seawater can be directly used for toilet flushing in coastal areas to reduce our dependence on desalination and freshwater resources. The presence of high-salt content in the generated wastewater from seawater toilet flushing could limit the performance of conventional biological nitrogen removal processes. Anaerobic ammonium oxidation (anammox) process is regarded as one of the most energy-efficient process for nitrogen removal from N-rich waste streams. In this study, we demonstrated the application of a novel marine anammox bacterium (Candidatus Scalindua sp. AMX11) in a membrane bioreactor (MBR) to treat moderate-saline (∼1.2% salinity) and N-rich organic (2 mM acetate) solution, prepared using real seawater. The MBR showed stable performance with nitrogen removal rate of 0.3 kg–N m−3 d−1 at >90% N-removal efficiency. Furthermore, results of 15N stable isotope experiments revealed that anammox bacteria was mainly responsible for respiratory ammonification through NO3− reduction to NH4+ via NO2−, and the by-products of respiratory ammonification were used as substrates by anammox bacteria. The dominant role of anammox bacteria in nitrogen removal under saline and organic conditions was further confirmed by genome-centric combined metagenomics and meta-transcriptomic approach. Taken together, these results highlight the potential application of marine anammox bacteria for treating saline wastewater generated from seawater toilet flushing practices.
    Citation
    Ali, M., Shaw, D. R., & Saikaly, P. E. (2020). Application of an enrichment culture of the marine anammox bacterium “Ca. Scalindua sp. AMX11” for nitrogen removal under moderate salinity and in the presence of organic carbon. Water Research, 170, 115345. doi:10.1016/j.watres.2019.115345
    Sponsors
    This work, was funded by Center Competitive Funding Program (FCC/1/1971-33-01) to Pascal E. Saikaly, from King Abdullah University of Science and Technology (KAUST).
    Publisher
    Elsevier
    Journal
    Water Research
    DOI
    10.1016/j.watres.2019.115345
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S0043135419311194
    Relations
    Is Supplemented By:
    • [Bioproject]
      Title: Application of an enrichment culture of the marine anammox bacterium Ca . Scalindua for nitrogen removal under moderate salinity and in the presence of organic carbonPublication Date: 2019-09-18. bioproject: PRJNA482223 Handle: 10754/666719
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.watres.2019.115345
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