title: Performance of aerobic nitrite granules treating an anaerobic pre-treated wastewater originating from the potato industry.
abstract: In this study nitrogen removal via nitrite >80% was achieved after approximately 80days in a sequencing batch reactor (SBR) treating pre-treated industrial wastewater originating from the potato industry. Thereafter, SBR performance was investigated during the formation of aerobic nitrite granules (ANG). The first granules appeared after 26days leading to full granulation after 64days. ANG showed excellent settling properties, as the Sludge Volume Index (SVI) went down to 16mL/g and a SVI10/SVI30=1 was obtained. qPCR analysis showed that slow growing organisms, especially polyphosphate accumulating organisms (PAO) were stimulated by an anaerobic feeding strategy. The average nitrogen removal was 95.3% over the entire operational period, and it mainly followed the "nitrite-route". Moreover, with ANG also phosphorus removal efficiencies up to 65.7% could be achieved. However, it has to be mentioned that nitrous oxide was an important denitrification product, which implies some environmental concerns.
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium.
authors.forename: Thomas
authors.initials: T
authors.lastname: Dobbeleers
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium.
authors.forename: Dominique
authors.initials: D
authors.lastname: Daens
authors.affiliation: National University of Quilmes, Basic and Applied Microbiology Institute, Genetic Engineering and Cellular and Molecular Biology, Buenos Aires, Argentina.
authors.forename: Solange
authors.initials: S
authors.lastname: Miele
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium.
authors.forename: Jolien
authors.initials: J
authors.lastname: D'aes
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium.
authors.forename: Michel
authors.initials: M
authors.lastname: Caluwé
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium.
authors.forename: Luc
authors.initials: L
authors.lastname: Geuens
authors.affiliation: Research Group BioGEM, Bio-Chemical Green Engineering & Materials, Faculty of Applied Engineering, University of Antwerp, Salesianenlaan 90, 2660 Antwerp, Belgium. Electronic address: jan.dries2@uantwerpen.be.
authors.forename: Jan
authors.initials: J
authors.lastname: Dries
mesh_terms: D000383:Agriculture; D019149:Bioreactors; D058440:Denitrification; D004867:Equipment Design; D009573:Nitrites / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry; D009609:Nitrous Oxide / Q000032:analysis / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D012722:Sewage / Q000032:analysis*; D011198:Solanum tuberosum; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis*
chemical_list: D009573:Nitrites; D009584:Nitrogen; D009609:Nitrous Oxide; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater
keywords: Aerobic granular sludge; Control strategies; Industrial wastewater; Nitrite-pathway; Nitrous oxide; PAO