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231226s2022 xx |||||o 00| ||eng c |
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|a 10.1002/wer.10721
|2 doi
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|a pubmed24n1517.xml
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|a (DE-627)NLM340204923
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|a (NLM)35491722
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|a DE-627
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|a eng
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|a Di Capua, Francesco
|e verfasserin
|4 aut
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|a Pyrite-assisted denitrification in recirculated biofilter tolerates pH lower than 5
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|c 2022
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 29.08.2024
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022 The Authors. Water Environment Research published by Wiley Periodicals LLC on behalf of Water Environment Federation.
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|a This study demonstrates the feasibility of pyrite-assisted denitrification to treat mildly acidic wastewaters and proposes a convenient solution for nitrogen removal from acidic mining waters. Pyrite is a highly available and low-cost electron donor for autotrophic denitrification, whereas mining waters represent a source of nitrogen (N) contamination due to the use of N-containing explosives during mining operations and cyanide (CN)-based compounds for ore processing. In this study, the denitrification performance of a recirculated pyrite-packed biofilter (RPPB) treating simulated N-contaminated acidic mining waters is evaluated under decreasing pH conditions. The effect of feed organic carbon on the autotrophic process has been also investigated. N removal efficiencies (NRE) > 60% could be achieved at feed pH ≥ 4.5 and HRT ≥ 5 h. Decrease of influent pH to 3.0 reduced the NRE to 20%. The addition of 10 and 20 mg/L of ethanol to the influent did not significantly impact NRE of the RPPB. PRACTITIONER POINTS: Pyrite-assisted denitrification is proposed for treating acidic wastewaters. Nitrogen removal >60% was maintained at feed pH as low as 4.7. Decrease of feed pH to 3 strongly inhibited denitrification. The presence of organic carbon in the feed did not affect the autotrophic process
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|a Journal Article
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|a autotrophic denitrification
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|a biofilter
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|a mining water
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|a nitrogen removal
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|a pyrite6
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|a Esposito, Giovanni
|e verfasserin
|4 aut
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 94(2022), 5 vom: 29. Mai, Seite e10721
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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| 773 |
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|g volume:94
|g year:2022
|g number:5
|g day:29
|g month:05
|g pages:e10721
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|u http://dx.doi.org/10.1002/wer.10721
|3 Volltext
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