title: Characterization of anaerobic granular sludge developed in UASB reactors that treat ethanol, carbohydrates and hydrolyzed protein based wastewaters.
abstract: In this work, granules developed from UASB reactors that treat different types of wastewaters (ethanol, carbohydrates and protein-based synthetic wastewaters) were studied. Granule parameters (size distribution; density; settlement characteristics; elemental composition; acidogenic and methanogenic activities) were analyzed along with micro-organisms identified by FISH to better understand granule behavior and its formation process. Micro-organisms distributions in anaerobic granules are highly dependent on the type of treated wastewater. Granules developed in a UASB reactor that treats wastewater with a high content of carbohydrates presented high acidogenic bacteria colonization. Members of Methanosaetaceae were the dominant methanogens in the studied granules, and Methanobacteriales appear to be co-dominant in the granules developed with carbohydrates and protein-based wastewaters.
authors.affiliation: Department of Chemical Engineering, Universidad de Santiago de Compostela, Rua Lope Gómez de Marzoa s/n, E-15782 Santiago de Compostela, Spain. fmolina@usc.es
authors.forename: F
authors.initials: F
authors.lastname: Molina
authors.forename: C
authors.initials: C
authors.lastname: García
authors.forename: E
authors.initials: E
authors.lastname: Roca
authors.forename: J M
authors.initials: JM
authors.lastname: Lema
mesh_terms: D000693:Anaerobiosis; D019149:Bioreactors; D002241:Carbohydrates / Q000032:analysis* / Q000737:chemistry; D000431:Ethanol / Q000737:chemistry* / Q000378:metabolism; D017404:In Situ Hybridization, Fluorescence; D019640:Methanosarcinales / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D011506:Proteins / Q000737:chemistry* / Q000378:metabolism; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*; D014871:Water Microbiology
chemical_list: D002241:Carbohydrates; D011506:Proteins; D012722:Sewage; D000431:Ethanol