Lodo de esgoto granulado

identificação bacteriana

Abstract

Species of non-methanogenic bacteria were isolated and identified in granular sludge from UASB reactors, treating domestic sewage: Butyrivi"brio fibrisolvens, Clostridium sp, Desulfovibrio desu!furicans. These species are related to the hydrolitic and ac~togenic phases and with the sulphate ion reduction in anaerobic digestion. It was also noticed bacteria similar to Desulfotomaculum. Two genus of methanogenic bacteria were isolated: Methanobacterium sp and Methanotrix sp. The granular sludge presented specific methanogenic activity values of about 0.15g COD-CH/gVSS.d1, with spherical (diameter about 4mm), resistant and dark granules.