title: Combination of upflow anaerobic sludge blanket (UASB) reactor and partial nitritation/anammox moving bed biofilm reactor (MBBR) for municipal wastewater treatment.
abstract: In this study the combination of an upflow anaerobic sludge blanket (UASB) reactor and a deammonification moving bed biofilm reactor (MBBR) for mainstream wastewater treatment was tested. The competition between aerobic ammonium oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) was studied during a 5months period of transition from reject water to mainstream wastewater followed by a 16months period of mainstream wastewater treatment. The decrease of influent ammonium concentration led to a wash-out of suspended biomass which had a major contribution to nitrite production. Influence of a dissolved oxygen concentration and a transient anoxia mechanism of NOB suppression were studied. It was shown that anoxic phase duration has no effect on NOB metabolism recovery and oxygen diffusion rather than affinities of AOB and NOB to oxygen determine the rate of nitrogen conversion in a biofilm system. Anammox activity remained on the level comparable to reject water treatment systems.
authors.affiliation: Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden. Electronic address: andriym@kth.se.
authors.forename: Andriy
authors.initials: A
authors.lastname: Malovanyy
authors.affiliation: Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden; IVL Swedish Environmental Institute, Valhallavägen 81, 114 28 Stockholm, Sweden. Electronic address: jyan@kth.se.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Yang
authors.affiliation: Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden; IVL Swedish Environmental Institute, Valhallavägen 81, 114 28 Stockholm, Sweden. Electronic address: trela@kth.se.
authors.forename: Jozef
authors.initials: J
authors.lastname: Trela
authors.affiliation: Department of Sustainable Development, Environmental Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 76, 100-44 Stockholm, Sweden. Electronic address: elap@kth.se.
authors.forename: Elzbieta
authors.initials: E
authors.lastname: Plaza
mesh_terms: D000641:Ammonia / Q000378:metabolism; D018441:Biofilms; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D004867:Equipment Design; D009573:Nitrites / Q000378:metabolism; D009584:Nitrogen / Q000378:metabolism; D014865:Waste Disposal, Fluid / Q000295:instrumentation* / Q000379:methods*; D062065:Wastewater
chemical_list: D000641:Ammonia; D009573:Nitrites; D009584:Nitrogen; D062065:Wastewater
keywords: AOB; Anammox; MBBR; Mainstream deammonification; NOB