Albrechtsen, Hans-Jørgen

Binning, Philip John

Boe-Hansen, Rasmus

Gülay, Arda

Lee, Carson Odell

Lin, Katie

Musovic, Sanin

Nielsen, Peter B.

Smets, Barth F.

Tatari, Karolina

Online Research Database In Technology

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Downloaded from orbit.dtu.dk on: Dec 20, 2017Nitrification in biological rapid sand filters treating drinking watermonitoring governing factorsAlbrechtsen, Hans-Jørgen; Gülay, Arda; Smets, Barth F.; Lee, Carson Odell; Tatari, Karolina; Lin, Katie;Nielsen, Peter B.; Binning, Philip John; Boe-Hansen, Rasmus; Musovic, SaninPublication date:2014Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Albrechtsen, H-J., Gülay, A., Smets, B. F., Lee, C. O., Tatari, K., Lin, K., ... Musovic, S. (2014). Nitrification inbiological rapid sand filters treating drinking water: monitoring governing factors. Poster session presented at2014 IWA World Water Congress & Exhibition, Lisbon, Portugal.Thousands of groundwater based waterworks are using biological rapid sand filters (RSF). These filters should be seen as bioreactors where microbial processes (removal of e.g. ammonia, manganese, ferrous iron, methane, sulfides and natural organic matter) are more important than the simple physical straining processes. Unfortunately, most of the underlying microbial processes are poorly understood, which limits the management of the filters and can result in start-up problems and insufficient removal of the treated compounds.IntroA range of tools were developed to diagnose RSF performance, including small scale column assays and depth profiling of full scale filters. Process kinetics at different depths and locations in RSFs were mapped and quantified: several of the investigated filters were severely stratified with little activity in the lower parts. This indicates an overcapacity of the filters calling for RSF redesign.Results Tools were also developed and implemented to elucidate the composition of the microbial communities in RSFs and to quantify specific functional groups e.g. NH4+ and NO2- oxidizers, methanotrophs and selected Fe oxidizers.  These methods revealed the spatial distribution and density of the different functional groups, e.g.: AOA, AOB and NOB. Pyrosequencing of the microbiome of RSFs across several waterworks showed complex and diverse microbial communities, with a number of taxa shared across all waterworks. ResultsTo provide insight in the process mechanisms, kinetics and effects of environmental factors by: • Molecular investigations of the microorganisms responsible for the nitrification process• Detailed monitoring and experiments in the filters and in the laboratoryTopic & aimResultsReferences and AcknowledgementsNitrification in biological rapid sand filters treating drinking water - monitoring governing factorsHans-Jørgen Albrechtsen1*, Arda Gülay1, Barth F. Smets1, Carson O. Lee1, Karolina Tatari1, Katie Lin1, Peter B. Nielsen2, Philip J. Binning1, Rasmus Boe-Hansen2, Sanin Musovic11Technical University of Denmark, 2Krüger A/S*hana@env.dtu.dk • Gülay, A., Tatari, K., Musovic, S., Mateiu, R. V., Albrechtsen H.-J., Smets, B.F. (2014). Internal porosity of mineral coating supports microbial activity in rapid sand filters for treatment of drinking water. Applied Environmental Microbiology, 80 (22) In press• Lee, C.O., Boe-Hansen, R., Musovic, S., Smets, B.F., Albrechtsen, H-J. & Binning, P.J. (2014). Effects of dynamic operating conditions on nitrification in biological rapid sand filters for drinking water treatment. Water Research, 64 p. 226-236• Tatari, K., B.F. Smets & H.-J. Albrechtsen, 2013: A novel bench-scale column assay to investigate site-specific nitrification biokinetics in biological rapid sand filters. Water Research, 47 (16), p. 6380-6387. • Gülay, A., Musovic, S., Albrechtsen, H-J., & Smets, B. F. (2013). Neutrophilic iron-oxidizing bacteria: Occurrence and relevance in biological drinking water treatment. Water Science and Technology: Water Supply, 13(5), p. 1295-1301(Tatari et al., 2013) Volumetric ALR [g NH4-N m-3 h-1]0 2 4 6 8 10 12Volumetric ARR [g NH4-N m-3 h-1]01234Effluent NH4-N [mg L-1 ]0.00.51.01.52.0NH4 rate 3.9 m h-1NH4 rate 7.8 m h-1Eff NH4 3.9 m h-1Eff NH4 7.8 m h-1RDRmaxLDPilot scale columns, operated under controlled hydraulic conditions allowed to estimate safe operation windows (the shaded area) for nitrification. In this window the NH4+ load can be increased (by increasing flow rate or NH4+ concentration or both) and still meet the required effluent quality, indicating that process efficiency can be improved(Lee et al., 2014)This work was supported by the Danish Council for Strategic Research via the project DW Biofilters –Sustainable drinking water treatment, biological filterswww.dwbiofilters.dk

Nitrification in biological rapid sand filters treating drinking water:monitoring governing factors

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Nitrification in biological rapid sand filters treating drinking water:monitoring governing factors

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