Integrated upflow anaerobic sludge blanket and radial-flow aerobic reactors for sewage treatment - Lopes, Alexandre Colzi; Leitão, Rodrigo Lopes de Freitas; Garbossa, Luis Hamilton Pospissil; Foresti, Eugenio (Taller y Simposio Latinoamericano sobre Digestion Anaerobia, 2005)