title: Impacts of composite wastewater on a Pampean stream (Argentina) and phytoremediation alternative with Spirodela intermedia Koch (Lemnaceae) growing in batch reactors.
abstract: Poultry slaughterhouses are producing increasing amounts of solid organic by-products and waste in Argentina. The objectives of this study are to assess the impacts of wastewater, mainly composed of poultry slaughterhouse effluent, on a Pampean stream and to evaluate the convenience of phytoremediation alternative with Spirodela intermedia. Impacts over La Choza stream (Buenos Aires, Argentina) were evaluated by means of physical and chemical characterization of the water upstream and downstream input. Nutrients and total suspended solids increased downstream of the open channel outlet. A bioassay was performed in order to evaluate the role of S. intermedia in wastewater treatment. Two treatments were performed in batch reactors during 144 h (6 days), with (treatment A) and without (treatment B) the addition of S. intermedia. Water samples were taken at 8, 24, 48, 96 and 144 h after the start of the assay for the determination of ammonium, nitrite, nitrate, soluble reactive phosphorus and total phosphorus. Since removal rates of ammonium and total phosphorus were significantly higher in treatment A than in treatment B and the nitrification process was highly increased in treatment A, then the species could be used for the phytoremediation of composite wastewater.
authors.affiliation: Museo Argentino de Ciencias Naturales Bernardino Rivadavia - Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Ángel Gallardo 470 (C1405DJR), Buenos Aires, Argentina. gabrielomarbasilico@hotmail.com
authors.forename: Gabriel
authors.initials: G
authors.lastname: Basílico
authors.forename: Laura
authors.initials: L
authors.lastname: de Cabo
authors.forename: Ana
authors.initials: A
authors.lastname: Faggi
mesh_terms: D000003:Abattoirs; D029064:Araceae / Q000378:metabolism*; D001118:Argentina; D001673:Biodegradation, Environmental; D019149:Bioreactors; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000378:metabolism
chemical_list: D000644:Quaternary Ammonium Compounds; D014874:Water Pollutants, Chemical