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Combined partial nitritation/Anammox system for treatment of digester supernatant
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
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2006 (English)In: Water Science and Technology, ISSN 0273-1223, Vol. 53, no 12, 149-159 p.Article in journal (Refereed) Published
Abstract [en]

One-year (2004) comprehensive investigations in a semi-industrial pilot plant (5 m(3)) were carried out with the aim of assessing the influence of operational parameters on the partial nitritation/Anammox system performance. In the system designed as a moving-bed biofilm reactor, the influent nitrogen load to the Anammox reactor was progressively increased and a stable Anammox bacterial culture was obtained. Interaction between subsequent, aerobic and anaerobic conditions in the partial nitritation and Anammox reactors, respectively, granted conditions to remove nitrogen through the nitrite route. It implies that the oxygen supply can be limited to a high extent. A control strategy for the partial nitritation step relied on concomitant adjustment of the air supply with a variable influent nitrogen load, which can be monitored by both pH and conductivity measurements. In the Anammox reactor, an influent nitrite-to-ammonium ratio plays a vital role in obtaining efficient nitrogen removal. During the 1-year experimental period, the Anammox reactor was operated steadily and average nitrogen removal efficiency was 84% with 97% as the maximum value.

Place, publisher, year, edition, pages
2006. Vol. 53, no 12, 149-159 p.
Keyword [en]
Anammox, biofilm, moving-bed reactor, nitrogen removal, partial nitritation, supernatant
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-9049DOI: 10.2166/wst.2006.417ISI: 000239543700017Scopus ID: 2-s2.0-33746515637OAI: oai:DiVA.org:kth-9049DiVA: diva2:14592
Note
QC 20101115, QC 20110929. Conference: International Conference on Nutrient Management in Wastewater Treatment Processes and Recycle Streams. Cracow, POLAND. SEP 19-21, 2005 Available from: 2006-01-31 Created: 2006-01-31 Last updated: 2011-09-29Bibliographically approved
In thesis
1. Assessment of a partial nitritation/Anammox system for nitrogen removal
Open this publication in new window or tab >>Assessment of a partial nitritation/Anammox system for nitrogen removal
2006 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis evaluates the performance of a deammonification system designed as a two-step tech-nology consisting of an initial partial nitritation followed by an Anammox process. Operation of a technical-scale pilot plant at the Himmerfjärden Wastewater Treatment Plant (Grödinge, Swe-den) has been assessed. Oxygen Uptake Rate (OUR) to evaluate the respiration activity of nitrifi-ers in the system and batch tests to assess reaction rates have also been applied in the study. It was found that the total inorganic nitrogen elimination strongly depended on the nitrite-to-ammonium ratio in the influent to the Anammox reactor, which was correlated with the per-formance of the partial nitritation phase. Therefore, a control strategy for oxidation of ammo-nium to nitrite has been proposed. Controlled oxygen supply to the partial nitritation reactor is obligatory to obtain a proper pH drop indicating oxidation of ammonia to nitrite at the adequate ratio. A very high nitrogen removal efficiency (an average of 84%) and stable operation of the system have been reached. Conductivity measurements were also used to monitor the system influent nitrogen load and the nitrogen removal in the Anammox reactor. The data gathered from the operation of the pilot plant enabled the use of multivariate data analysis to model the process behaviour and the assessment of the covariances between the process parameters. The options for full-scale implementation of the Anammox systems have been proposed as a result of the study.

Place, publisher, year, edition, pages
Stockholm: KTH, 2006. xvi, 57 p.
Series
Trita-LWR. LIC, ISSN 1650-8629 ; 2034
Keyword
Biofilm; Deammonification; Nitrogen removal; Oxygen Uptake Rate (OUR); Partial nitritation/Anammox system
National Category
Civil Engineering
Identifiers
urn:nbn:se:kth:diva-604 (URN)91-7178-167-6 (ISBN)
Presentation
2006-02-02, V1, V, Teknikringen 72, KTH campus, 13:30
Opponent
Supervisors
Note
QC 20101115Available from: 2006-01-31 Created: 2006-01-31 Last updated: 2010-11-15Bibliographically approved

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