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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/wer.1296
|2 doi
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|a pubmed24n1018.xml
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|a (DE-627)NLM305521845
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|a (NLM)31954086
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Bekele, Zerihun A
|e verfasserin
|4 aut
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| 245 |
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|a Sensor-mediated granular sludge reactor for nitrogen removal and reduced aeration demand using a dilute wastewater
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 25.06.2020
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|a Date Revised 07.12.2022
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2020 The Authors. Water Environment Research published by Wiley Periodicals, Inc. on behalf of Water Environment Federation.
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|a A sensor-mediated strategy was applied to a laboratory-scale granular sludge reactor (GSR) to demonstrate that energy-efficient inorganic nitrogen removal is possible with a dilute mainstream wastewater. The GSR was fed a dilute wastewater designed to simulate an A-stage mainstream anaerobic treatment process. DO, pH, and ammonia/nitrate sensors measured water quality as part of a real-time control strategy that resulted in low-energy nitrogen removal. At a low COD (0.2 kg m-3 day-1 ) and ammonia (0.1 kg-N m-3 day-1 ) load, the average degree of ammonia oxidation was 86.2 ± 3.2% and total inorganic nitrogen removal was 56.7 ± 2.9% over the entire reactor operation. Aeration was controlled using a DO setpoint, with and without residual ammonia control. Under both strategies, maintaining a low bulk oxygen level (0.5 mg/L) and alternating aerobic/anoxic cycles resulted in a higher level of nitrite accumulation and supported shortcut inorganic nitrogen removal by suppressing nitrite oxidizing bacteria. Furthermore, coupling a DO setpoint aeration strategy with residual ammonia control resulted in more stable nitritation and improved aeration efficiency. The results show that sensor-mediated controls, especially coupled with a DO setpoint and residual ammonia controls, are beneficial for maintaining stable aerobic granular sludge. PRACTITIONER POINTS: Tight sensor-mediated aeration control is need for better PN/A. Low DO intermittent aeration with minimum ammonium residual results in a stable N removal. Low DO aeration results in a stable NOB suppression. Using sensor-mediated aeration control in a granular sludge reactor reduces aeration cost
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|a Journal Article
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|a NOB suppression
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|a aeration control
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|a mainstream N removal
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|a partial nitritation/anammox
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|a Nitrites
|2 NLM
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|a Sewage
|2 NLM
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|a Waste Water
|2 NLM
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|a Nitrogen
|2 NLM
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Delgado Vela, Jeseth
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bott, Charles B
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Love, Nancy G
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Water environment research : a research publication of the Water Environment Federation
|d 1998
|g 92(2020), 7 vom: 19. Juli, Seite 1006-1016
|w (DE-627)NLM098214292
|x 1554-7531
|7 nnns
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| 773 |
1 |
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|g volume:92
|g year:2020
|g number:7
|g day:19
|g month:07
|g pages:1006-1016
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|u http://dx.doi.org/10.1002/wer.1296
|3 Volltext
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|d 92
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