Effect of nitrogen loading on denitrification, denitritation and filtration performances of membrane bioreactors fed with biogenic and chemical elemental sulfur

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dc.authorid0000-0002-0536-6250en_US
dc.authorscopusid23976946000en_US
dc.contributor.authorUçar, Deniz
dc.date.accessioned2022-04-05T08:20:13Z
dc.date.available2022-04-05T08:20:13Z
dc.date.issued2021en_US
dc.departmentBTÜ, Mühendislik ve Doğa Bilimleri Fakültesi, Çevre Mühendisliği Bölümüen_US
dc.description.abstractAutotrophic denitrification with elemental sulfur (S0) as an electron donor is a clean and cost-effective solution for nitrogen removal from contaminated waters poor in organics and has gained increasing interest in the last decades. In contrast, less attention has been driven towards autotrophic denitritation and the effect of nitrogen oxide (N-NOx−) loading and feeding strategy on the process. This study investigates the denitrification and denitritation performances of two membrane bioreactors fed with chemically synthesized S0 (S0chem) and biogenic S0 (S0bio) under different N-NOx− loading rates (50 and 100 mg N-NOx− L−1 d−1) and feeding strategies (nitrate or nitrite only and both nitrate and nitrite) and their influence on the specific nitrogen uptake rate (SNUR) of S0-oxidizing denitrifiers. N-NOx− removal was faster with S0bio compared to S0chem at all tested N-NOx− loading rates and feeding strategies, confirming S0bio as an advantageous electron donor for autotrophic NO3− and NO2− reductions. Influent NO2− levels as high as 100 mg N-NO2− L−1 did not inhibit autotrophic denitrification and denitritation. On the contrary, batch activity tests showed that NO2− feeding resulted in higher SNUR values compared to feeding with both NO3− and NO2− and with NO3− only, confirming NO2− as a more thermodynamically favorable electron acceptor than NO3−. The impact of different operational conditions on membrane filtration performance was also evaluated, showing that S0bio was the main responsible for pressure increase and membrane fouling during bioreactor operation.en_US
dc.identifier.doi10.1016/j.cej.2021.129514en_US
dc.identifier.issn13858947
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttps://hdl.handle.net/20.500.12885/1890
dc.identifier.volume419en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorUçar, Deniz
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofChemical Engineering Journalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAutotrophic denitrificationen_US
dc.subjectBiogenic sulfuren_US
dc.subjectDenitritationen_US
dc.subjectElemental sulfuren_US
dc.subjectMBRen_US
dc.subjectNitriteen_US
dc.titleEffect of nitrogen loading on denitrification, denitritation and filtration performances of membrane bioreactors fed with biogenic and chemical elemental sulfuren_US
dc.typeArticleen_US

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