title: Sustainable nitrogen removal by denitrifying anammox applied for anaerobic pre-treated potato wastewater.
abstract: The feasibility of sustainable nitrogen removal was investigated in a two stage biofilm configuration consisting of a MBBR (Moving Bed Biofilm Reactor) and a Deamox reactor (Biobed-EGSB). The MBBR is used for nitrification and the denitrifying ammonium oxidation (Deamox) is aimed at a nitrogen removal process in which part of the required nitrite for the typical anammox reaction originated from nitrate. Anaerobic pre-treated potato wastewater was supplied to a MBBR and Deamox reactor operated in series with a bypass flow of 30%. The MBBR showed stable nitrite production at ammonium-loading rates of 0.9-1.0 kg NH₄-N/m³ d with ammonium conversion rates of 0.80-0.85 kg NH₄-N/m³ d. The nitrogen-loading rate and conversion rate of the Deamox reactor were 1.6-1.8 and 1.6 kg N/m³ d. The maximum ammonium removal capacity in the Deamox reactor was 0.6 kg NH₄-N/m³ d. The removal efficiency of soluble total nitrogen reached 90%. The Deamox process performance was found to be negatively affected during decline of the operating temperature from 33 to 22 °C and by organic loading rates with a chemical oxygen demand (COD)/NO₂-N ratio >1.
authors.affiliation: Amecon, P.O. Box 606, 2600 AP Delft, The Netherlands. arnoldmulder@amecon.nl
authors.forename: A
authors.initials: A
authors.lastname: Mulder
authors.forename: A I
authors.initials: AI
authors.lastname: Versprille
authors.forename: D
authors.initials: D
authors.lastname: van Braak
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors; D058440:Denitrification; D009426:Netherlands; D058465:Nitrification; D009584:Nitrogen / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010865:Pilot Projects; D000644:Quaternary Ammonium Compounds / Q000378:metabolism*; D012212:Rheology; D012722:Sewage / Q000382:microbiology; D011198:Solanum tuberosum / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D009584:Nitrogen; D000644:Quaternary Ammonium Compounds; D012722:Sewage; D062065:Wastewater