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231224s2017 xx |||||o 00| ||eng c |
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|a 10.1080/09593330.2016.1228700
|2 doi
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|a pubmed24n0880.xml
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|a (NLM)27603114
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|a eng
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|a Raboni, M
|e verfasserin
|4 aut
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|a Validation of a new model for the sizing of denitrification reactors, by testing full-scale plants
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|c 2017
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|a Text
|b txt
|2 rdacontent
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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 03.10.2017
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|a Date Revised 03.10.2017
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a A new deterministic model for the calculation of the specific denitrification rate (SDNR), useful for the design of pre-denitrification reactors, was tested on eight full-scale activated sludge plants. The model represents the SDNR at 20°C (SDNR20°C) as a function of the sludge loading in the denitrification reactor (F:MDEN) and the residual dissolved oxygen in the denitrification reactor (DODEN). The results proved the ability of the model in calculating the SDNR20°C. The model shows a lower degree of adaptability for small-sized plants. SDNR20°C proved to have a strong sensitivity to DODEN, mainly in correspondence with low DO concentrations (less than 2 mg L-1). The sensitivity decreases at greater DO values, but with a progressively less marked gradient, up to becoming weak only at DO concentrations greater than 0.4-0.5 mg L-1, which are rarely found in full-scale plants. DO concentrations measured in real-scale facilities are mostly in the range 0.2-0.4 mg L-1. These concentrations cause adverse effects on the kinetics of nitrogen removal, and consequently on the denitrification performance. Thus, minimizing DO in the pre-denitrification reactor is relevant. The sensitivity of SDNR20°C to F:MDEN was less important, as it is characterized by a growing linear behaviour with a low slope
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|a Journal Article
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|a Activated sludge
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|a biological processes
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|a denitrification
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|a modelling
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|a nitrogen removal
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|a Torretta, V
|e verfasserin
|4 aut
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|i Enthalten in
|t Environmental technology
|d 1993
|g 38(2017), 11 vom: 04. Juni, Seite 1376-1382
|w (DE-627)NLM098202545
|x 1479-487X
|7 nnns
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|g volume:38
|g year:2017
|g number:11
|g day:04
|g month:06
|g pages:1376-1382
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|u http://dx.doi.org/10.1080/09593330.2016.1228700
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