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Tytuł:
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Sequential sulfur-based denitrification/denitritation and nanofiltration processes for drinking water treatment.
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Autorzy:
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Asik G; Bioengineering Department, Istanbul Medeniyet University, Uskudar, Istanbul, Turkey.
Yilmaz T; Environmental Engineering Department, Faculty of Civil Engineering, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey.
Di Capua F; Department of Civil, Environmental, Land, Building Engineering and Chemistry, Polytechnic University of Bari, Via E. Orabona 4, 70125, Bari, Italy; Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125, Naples, Italy.
Ucar D; Department of Environmental Engineering, Bursa Technical University, 16310, Bursa, Turkey.
Esposito G; Department of Civil, Architectural and Environmental Engineering, University of Naples Federico II, Via Claudio 21, 80125, Naples, Italy.
Sahinkaya E; Bioengineering Department, Istanbul Medeniyet University, Uskudar, Istanbul, Turkey. Electronic address: .
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Źródło:
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Journal of environmental management [J Environ Manage] 2021 Oct 01; Vol. 295, pp. 113083. Date of Electronic Publication: 2021 Jun 23.
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Typ publikacji:
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Journal Article
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Język:
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English
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Imprint Name(s):
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Original Publication: London ; New York, Academic Press.
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MeSH Terms:
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Drinking Water*
Water Purification*
Autotrophic Processes ; Bioreactors ; Denitrification ; Nitrates ; Nitrogen ; Sulfur
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Contributed Indexing:
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Keywords: Autotrophic denitrification; Denitritation; Drinking water; Elemental sulfur; Nanofiltration; Packed bed reactor
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Substance Nomenclature:
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0 (Drinking Water)
0 (Nitrates)
70FD1KFU70 (Sulfur)
N762921K75 (Nitrogen)
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Entry Date(s):
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Date Created: 20210625 Date Completed: 20210804 Latest Revision: 20210804
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Update Code:
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20240105
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DOI:
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10.1016/j.jenvman.2021.113083
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PMID:
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34171780
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Efficient and cost-effective solutions for nitrogen removal are necessary to ensure the availability of safe drinking water. This study proposes a combined treatment for nitrogen-contaminated groundwater by sequential autotrophic nitrogen removal in a sulfur-packed bed reactor (SPBR) and excess sulfate rejection via nanofiltration (NF). Autotrophic nitrogen removal in the SPBR was investigated under both denitrification and denitritation conditions under different NO 3 - and NO 2 - loading rates (LRs) and feeding strategies (NO 3 - only, NO 2 - only, or both NO 3 - and NO 2 - in the feed). Batch activity tests were carried out during SPBR operation to evaluate the effect of different feeding conditions on nitrogen removal activity by the SPBR biofilm. Bacteria responsible for nitrogen removal in the bioreactor were identified via Illumina sequencing. Dead-end filtration tests were performed with NF membranes to investigate the elimination of excess sulfate from the SPBR effluent. This study demonstrates that the combined process results in effective groundwater treatment and evidences that an adequately high nitrogen LR should be maintained to avoid the generation of excess sulfide.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)