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Oxidation-reduction...
Oxidation-reduction potential (ORP) as a control parameter in a single-stage partial nitritation/anammox process treating reject water
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- Yang, Jingjing (författare)
- KTH,Mark- och vattenteknik,Swedish Environmental Research Institute (IVL), Sweden
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- Trela, Jozef (författare)
- KTH,Mark- och vattenteknik,Swedish Environmental Research Institute (IVL), Sweden,Land and water resources engineering
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- Plaza, Elzbieta (författare)
- KTH,Mark- och vattenteknik
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- Wahlberg, Olle (författare)
- KTH,Kemi
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- Levlin, Erik (författare)
- KTH,Hållbar utveckling, miljövetenskap och teknik
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(creator_code:org_t)
- 2015-12-29
- 2016
- Engelska.
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Ingår i: Journal of chemical technology and biotechnology (1986). - : John Wiley & Sons. - 0268-2575 .- 1097-4660. ; 91:10, s. 2582-2589
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- BBACKGROUND: Redox potential value (or pE) can be used as a monitoring parameter for deammonification processes treating reject water. In this study its use as a control parameter was investigated. Experiments were carried out with a one-stage partial nitritation/anammox process in a 200 L moving bed biofilm reactor (MBBR) with 40% filled Kaldnes biofilm carriers. RESULTS: Tests on different combinations of nitrogen loads (1.8-3.3 gN m-2 d-1) and pE values (-1, 0, 1) revealed that process performance was stable and nitrogen removal efficiency >80% was achieved at all tested pE values except pE=-1. A value close to pE=0 was the most suitable in terms of process performance at 25°C at all tested pE values. With a fixed redox potential value (pE=0) used in the system, the air supply adjusted automatically under different nitrogen loads and maintained a high nitrogen removal efficiency. Theoretical calculations showed that pE>0.15 (at pH=7) provides conditions for nitrite conversion into nitrate at 25°C. CONCLUSION: Redox control turned out to be a suitable control parameter for operation of a partial nitritation/anammox process. A redox value of 0 was a suitable value under different nitrogen loads in this pilot-scale study.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
Nyckelord
- single-stage partial nitritation/anammox process
- oxidation-reduction potential (ORP)
- process control strategy
- reject water treatment
- Byggvetenskap
- Civil and Architectural Engineering
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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