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231226s2022 xx |||||o 00| ||eng c |
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|a 10.2166/wst.2022.187
|2 doi
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|a pubmed24n1143.xml
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|a (DE-627)NLM342918931
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|a (NLM)35771053
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|a DE-627
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|c DE-627
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|a eng
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|a Kamei, Tatsuru
|e verfasserin
|4 aut
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|a Investigation of nitrite accumulation by hydrogenotrophic denitrification in a moving bed biofilm reactor for partial denitrification and anammox process
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|c 2022
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 04.07.2022
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|a Date Revised 07.12.2022
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|a published: Print
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|a Citation Status MEDLINE
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|a The partial denitrification and anammox (PDA) process has received attention for its ability to optimize treatment of wastewater containing a low NH4+-N concentration. This study investigated the suitable operational conditions for NO2--N accumulation by hydrogenotrophic denitrification (HD) in operation of a laboratory-scale moving bed biofilm reactor, for future application in the PDA process. NO2--N accumulation was achieved by minimizing the H2 flow rate under optimized conditions (i.e., 15 mL/min H2 flow rate, 40 mg-N/L influent NO3--N, 7.0 h hydraulic retention time, and 2 L working volume). Hydrogenophaga comprised 39.2% of the bacterial abundance after NO2--N accumulated, indicating its contribution to the NO2--N accumulation. In addition, an intermittent H2 supply maintained the NO2--N accumulation rate (NAR) and maximized the nitrite accumulation efficiency (NAE). A H2 supply ratio of 0.7 (i.e., ON: 7 min, OFF: 3 min) was optimal, which induced increases in NAR, NAE, and the NO3--N removal efficiency that reached 0.07±0.01 kg-N/m3/d, 64.4±14.5%, and 89.2±8.9%, respectively. The ratio of H2 supply rate to the NO3--N loading rate was calculated as 4.3 in this experiment, which may represent the optimal balance for maximization of NO2--N accumulation by HD
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|a Journal Article
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|a Nitrites
|2 NLM
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|a Sewage
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|a Waste Water
|2 NLM
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|a Nitrogen
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|a N762921K75
|2 NLM
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|a Nitrogen Dioxide
|2 NLM
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|a S7G510RUBH
|2 NLM
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|a Rujakom, Suphatchai
|e verfasserin
|4 aut
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|a Nakano, Mai
|e verfasserin
|4 aut
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|a Maharjan, Amit Kumar
|e verfasserin
|4 aut
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|a Kazama, Futaba
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Water science and technology : a journal of the International Association on Water Pollution Research
|d 1986
|g 85(2022), 12 vom: 07. Juni, Seite 3396-3407
|w (DE-627)NLM098149431
|x 0273-1223
|7 nnns
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|g volume:85
|g year:2022
|g number:12
|g day:07
|g month:06
|g pages:3396-3407
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|u http://dx.doi.org/10.2166/wst.2022.187
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