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Evaluation of deamm...
Evaluation of deammonification process performance at different aeration strategies
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- Zubrowska-Sudol, Monika (author)
- Department of Environment Engineering, Warsaw University of Technology, Warsaw, Poland
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- Yang, Jingjing (author)
- KTH,VA-teknik, Vatten, Avlopp och Avfall
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- Trela, Jozef (author)
- KTH,VA-teknik, Vatten, Avlopp och Avfall
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- Plaza, Elzbieta (author)
- KTH,VA-teknik, Vatten, Avlopp och Avfall
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(creator_code:org_t)
- IWA Publishing, 2011
- 2011
- English.
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In: Water Science and Technology. - : IWA Publishing. - 0273-1223 .- 1996-9732. ; 63:6, s. 1168-1176
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.2...
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Abstract
Subject headings
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- In a deammonification process applied in the moving bed biofilm reactor (MBBR) oxygen is a crucial parameter for the process performance and efficiency. The objective of this study was to investigate different aeration strategies, characterised by the ratio between non-aerated and aerated phase times (R) and dissolved oxygen concentrations (DO). The series of batch tests were conducted with variable DO concentrations (2, 3, 4 mg L-1) and R values (0-continuous aeration; 1/3, 1, 3-intermittent aeration) but with the same initial ammonium concentration, volume of the moving bed and temperature. It was found that the impact of DO on deammonification was dependent on the R value. At R=0 and R=1/3, an increase of DO caused a significant increase in nitrogen removal rate, whereas for R=1 and R=3 similar rates of the process were observed irrespectively of the DO. The highest nitrogen removal rate of 3.33 g N m(-2) d(-1) (efficiency equal to 69.5%) was obtained at R=1/3 and DO=4 mg L-1. Significantly lower nitrogen removal rates (1.17-1.58 g N m(-2) d(-1)) were observed at R=1 and R=3 for each examined DO. It was a consequence reduced aerated phase duration times and lesser amounts of residual nitrite in non-aerated phases as compared to R 1/3.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
Keyword
- deammonification
- dissolved oxygen
- intermittent aeration
- ratio between non-aerated and aerated phase timings
- Water engineering
- Vattenteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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