title: Nitritation-denitritation in landfill leachate with glycerine as a carbon source.
abstract: The effects of limited oxygen concentration (0.7 mg O2/L) in the aeration phase of the SBR cycle and glycerine as an additional carbon source on the effectiveness of nitritation-denitritation and sludge production during municipal landfill leachate treatment were examined. As carbon sources, sodium acetate (Ac) and sodium acetate (Ac) with glycerine (Gly) in the proportions of 3:1 (v/v) and 1:1 (v/v) were added. Low dissolved oxygen concentration inhibited the second stage of nitrification and nitrites were the main final products. Nitritation effectiveness was ca. 98-99%. Denitritation efficiency was relatively low (61%) in the reactor fed with Ac, which may be linked with high sludge production (Yobs - 0.6 mgVSS/mg COD). Glycerine addition (Ac:Gly 1:1, v/v) caused an increase in process efficiency to 75.6% with a concurrent significant decrease in biomass production (Yobs - 0.46 mg VSS/mg COD).
authors.affiliation: University of Warmia and Mazury in Olsztyn, Department of Environmental Biotechnology, Słoneczna Str. 45G, Olsztyn 10-709, Poland. dorotak@uwm.edu.pl
authors.forename: Dorota
authors.initials: D
authors.lastname: Kulikowska
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Bernat
mesh_terms: D018533:Biomass; D002244:Carbon / Q000737:chemistry*; D005990:Glycerol / Q000737:chemistry*; D009573:Nitrites / Q000737:chemistry*; D009584:Nitrogen / Q000302:isolation & purification; D012722:Sewage; D064091:Waste Disposal Facilities
chemical_list: D009573:Nitrites; D012722:Sewage; D002244:Carbon; D009584:Nitrogen; D005990:Glycerol
keywords: COD removal; Municipal landfill leachate; Nitritation–denitritation; SBR; Sludge production