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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Type
ArticleKAUST Department
Environmental Science and Engineering ProgramWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
KAUST Grant Number
FCC/1/1971-33-01Date
2019-11-27Online Publication Date
2019-11-27Print Publication Date
2020-03Embargo End Date
2021-11-27Permanent link to this record
http://hdl.handle.net/10754/660330
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Show full item recordAbstract
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.2019.115345Sponsors
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
ElsevierJournal
Water ResearchAdditional Links
https://www.sciencedirect.com/science/article/pii/S0043135419311194Relations
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