title: Microalgal growth in municipal wastewater treated in an anaerobic moving bed biofilm reactor.
abstract: Nutrient removal from the effluent of an anaerobic moving bed biofilm reactor (AnMBBR) treated with microalgae was evaluated. Algal treatment was highly efficient in removal of nutrients and discharge limits were met after 3days. Extending the cultivation time from 3 to 5days resulted in a large increase in biomass, from 233.3±49.3 to 530.0±72.1mgL(-1), despite nutrients in the water being exhausted after 3days (ammonium 0.04mgL(-1), orthophosphate <0.05mgL(-1)). Biomass productivity, lipid content and quality did not differ in microalgal biomass produced in wastewater sampled before the AnMBBR. The longer cultivation time resulted in a slight increase in total lipid concentration and a significant decrease in linolenic acid concentration in all treatments. Differences were observed in chemical oxygen demand, which decreased after algal treatment in wastewater sampled before the AnMBBR whereas it increased after algal treatment in the effluent from the AnMBBR.
authors: Department of Biosystems and Technology, Swedish University of Agricultural Sciences, Alnarp, Sweden. Electronic address: Malin.Hultberg@slu.se.
authors: Malin
authors: M
authors: Hultberg
authors: AnoxKaldnes, Veolia Water Treatment Technologies AB, Lund, Sweden.
authors: Lars-Erik
authors: LE
authors: Olsson
authors: Department of Plant Protection Biology, Swedish University of Agricultural Sciences, Alnarp, Sweden.
authors: Göran
authors: G
authors: Birgersson
authors: Ekoll AB, Malmö, Sweden.
authors: Susanne
authors: S
authors: Gustafsson
authors: Norups Gård Bioraff AB, Knislinge, Sweden.
authors: Bertil
authors: B
authors: Sievertsson
mesh_terms: D001673:Biodegradation, Environmental; D018441:Biofilms; D018533:Biomass; D019149:Bioreactors / Q000382:microbiology*; D002947:Cities; D004952:Esters / Q000032:analysis; D008055:Lipids; D058086:Microalgae / Q000254:growth & development*; D009584:Nitrogen / Q000302:isolation & purification; D010758:Phosphorus / Q000302:isolation & purification; D062065:Wastewater / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D004952:Esters; D008055:Lipids; D009584:Nitrogen; D010758:Phosphorus; D062065:Wastewater
keywords: AnMBBR; Chlorella spp.; Fatty acids; Nutrient removal; Scenedesmus spp.