title: Toxicity of the effluent from an anaerobic bioreactor treating cereal residues on Lactuca sativa.
abstract: Effluents generated during the process of anaerobic digestion should be treated before their disposal into the environment. The aim of this study was evaluating the effectiveness of the effluent treatment system from an anaerobic bioreactor, assessing the toxicity reduction with the Lactuca sativa seed germination and root elongation inhibition test. Three sampling points were selected along the effluent treatment system: inflow into the first treatment pond, outflow from the third pond and recirculated flow to the bioreactor. Effluent dilutions tested for each sampling point were 25% and 50% (v/v), undiluted sample and controls. The pH, conductivity, temperature, dissolved oxygen, BOD₅ and COD were measured. The decrease in the organic and inorganic loads was correlated with a reduction in the phytotoxicity. The use of the seed toxicity test allows evaluating the quality and effectiveness of the studied effluent treatment system.
authors: Laboratorio de Transformación de Residuos, Instituto de Microbiología y Zoología Agrícola-IMYZA, Instituto Nacional de Tecnología Agropecuaria-INTA, Buenos Aires, Argentina. byoung@cnia.inta.gov.ar
authors: Brian Jonathan
authors: BJ
authors: Young
authors: Nicolás Iván
authors: NI
authors: Riera
authors: María Eugenia
authors: ME
authors: Beily
authors: Patricia Alina
authors: PA
authors: Bres
authors: Diana Cristina
authors: DC
authors: Crespo
authors: Alicia Estela
authors: AE
authors: Ronco
mesh_terms: D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors / Q000382:microbiology*; D002523:Edible Grain; D019649:Food Industry; D018525:Germination / Q000187:drug effects; D018545:Lactuca / Q000187:drug effects* / Q000254:growth & development; D010100:Oxygen / Q000032:analysis; D061005:Ponds / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000633:toxicity*
chemical_list: D014873:Water Pollutants; D010100:Oxygen