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A one-stage system with partial nitritation and Anammox processes in Rotating Biological Contactor (RBC) for treating landfill leachate
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
Silesian University of Technology, Environmental Biotechnology Department.
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(English)In: Journal of Hazardous Materials, ISSN 0304-3894, E-ISSN 1873-3336Article in journal (Other academic) Submitted
Abstract [en]

One of the major aspects associated with landfilling of solid wastes is related to the discharge of leachate into environment. Leachates with high ammonium nitrogen content are generally difficult to effective treat in conventional biological treatment processes. Therefore, it brings a requirement of developing new processes and technologies. Additionally, treatment procedures must consider small flow rates of leachate. The Rotating Biological Contactor (RBC) is a good example of technology for treatment such wastewaters, because of its excellent shock and toxic loading capabilities, simple process control and low energy requirements. The main objective of the presented research was to investigate a simultaneous partial nitritation/Anammox process in the rotating biological contactor. For this purpose, the lab-scale reactor was fed with real landfill leachate from two municipal landfill sites in Gliwice and Zabrze (Poland). The reactor was highly loaded up to 7 g N m-2d-1 and it was possible to obtain the maximum inorganic nitrogen removal rate of 6.2 g N m-2d-1. Achieved results proved the possibility of efficient inorganic nitrogen removal by means of partial nitritation/ Anammox process in the temperature around 20°C.

Keyword [en]
Anammox; biofilm; deammonification; landfill leachate; nitrogen removal; RBC
National Category
Other Environmental Engineering
URN: urn:nbn:se:kth:diva-11942OAI: diva2:290617
Uppdaterad från manuskript 20100707 QC 20100707Available from: 2010-01-27 Created: 2010-01-27 Last updated: 2010-07-21Bibliographically approved
In thesis
1. Comparative study on different Anammox systems
Open this publication in new window or tab >>Comparative study on different Anammox systems
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The legal requirements for wastewater discharge into environment, especially to zones exposed to eutrophication, lately became stricter. Nowadays wastewater treatment plants have to manage with the new rules and assure better biogenic elements’ removal, in comparison with the past. There are some well-known methods of diminishing concentrations of these compounds, but they are ineffective in case of nitrogen-rich streams, as landfill leachate or reject waters from dewatering of digested sludge. This wastewater disturbs conventional processes of nitrification-denitrification and raise necessity of building bigger tanks. The partial nitritation followed by Anaerobic Ammonium Oxidation (Anammox) process appear to be an excellent alternative for traditional nitrification/denitrification. The process was investigated in three different reactors – Membrane Bioreactor (MBR), Moving Bed Biofilm Reactor (MBBR) and Rotating Biological Contactor (RBC). The process was evaluated in two options: as a two-stage process performed in two separate reactors and as a one-stage process. The two-step process, in spite of very low nitrogen removal rates, assured very high nitrogen removal efficiency, exceeding even 90% in case of the MBBR. However, obtained results revealed that the one-step system is a better option than the two-step system, no matter, what kind of nitrogen-rich stream is taken into consideration. Moreover, the one-step process was much less complicated in operation. Performed research confirmed a hypothesis, that the oxygen concentration in the bulk liquid and the nitrite production rate are the limiting factors for the Anammox reaction in a single reactor. In order to make a quick and simple determination of bacteria activity, the Oxygen Uptake Rate (OUR) tests were shown as an excellent tool for evaluation of the current bacteria activity reliably, and without a need of using expensive reagents. It was also shown, that partial nitritation/Anammox process, could be successfully applied at temperatures much lower than the optimum value. Performed Fluorescent in situ Hybridization (FISH) analyses, proved that the Anammox bacteria were mainly responsible for the nitrogen removal process.

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. xii, 72 p.
Trita-LWR. PHD, ISSN 1650-8602 ; 1053
Anammox; biofilm system; landfill leachate; nitrogen removal; reject water; removal rates
National Category
Other Environmental Engineering
urn:nbn:se:kth:diva-11933 (URN)978-91-7415-501-3 (ISBN)
Public defence
2010-02-12, V3, top floor, Teknikringen 72, KTH, Stockholm, 10:00 (English)
QC 20100707Available from: 2010-01-27 Created: 2010-01-27 Last updated: 2010-07-07Bibliographically approved

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