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Performance of partial nitritation-anammox processes at mainstream conditions in an IFAS system
Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa de Lope Gómez de Marzoa s/n, Santiago de Compostela, Galicia E-15782, Spain.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering.
Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa de Lope Gómez de Marzoa s/n, Santiago de Compostela, Galicia E-15782, Spain.
Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa de Lope Gómez de Marzoa s/n, Santiago de Compostela, Galicia E-15782, Spain.
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2019 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 250, article id 109538Article in journal (Refereed) Published
Abstract [en]

The partial nitritation-anammox processes implementation in the main line of wastewater treatment plants would lead them closer to the energy autarky. With this purpose, an integrated fixed film activated sludge (IFAS) reactor was operated at pilot scale. Efficient nitrogen removal (72 ± 11%) was achieved for anaerobically pre-treated municipal wastewater at low temperature (21 – 15 °C), with a nitrogen removal rate of 37 ± 3 g N/(m3·d) at 15 °C. The ammonium oxidizing bacteria were more abundant in the activated sludge, while anammox bacteria were primarily located in biofilm attached onto the carriers surface. Nitrite oxidizing bacteria (NOB) activity was similar between both fractions and its specific activity decreased more than that of other populations when the operating temperature was reduced. Furthermore, the IFAS operational strategy (aerobic/anoxic periods) allowed an efficient NOB activity suppression inside the reactor, which accounted only for the 10 – 20% of the maximum potential activity.

Place, publisher, year, edition, pages
Academic Press , 2019. Vol. 250, article id 109538
Keywords [en]
Anammox, Autotrophic nitrogen removal, Integrated fixed film activated sludge, Mainstream, Nitritation, ammonia, nitrate, nitrogen, activated sludge, ammonium, biofilm, bioreactor, low temperature, microbial activity, performance assessment, pollutant removal, temperature effect, wastewater, wastewater treatment, anammox bacterium, Article, denitrification, effluent, microbial biomass, municipal wastewater, nonhuman, waste water management
National Category
Water Engineering Environmental Management Water Treatment
Research subject
Planning and Decision Analysis, Strategies for sustainable development
Identifiers
URN: urn:nbn:se:kth:diva-263491DOI: 10.1016/j.jenvman.2019.109538ISI: 000497253000107Scopus ID: 2-s2.0-85072380173OAI: oai:DiVA.org:kth-263491DiVA, id: diva2:1375477
Note

QC 20191205

Available from: 2019-12-05 Created: 2019-12-05 Last updated: 2020-01-09Bibliographically approved

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Trela, JozefPlaza, Elzbieta

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