Influence of bed materials on the performance of an anaerobic sequencing batch biofilm reactor treating sewage wastewater - Lapa, Katt Regina; Garcia, Marcelo Loureiro; Sakamoto, Isabel Kimiko; Pozzi, Eloisa; Garbossa, Luis Hamilton Pospissil; Foresti, Eugenio; Zaiat, Marcelo (Taller y Simposio Latinoamericano sobre Digestion Anaerobia, 2005)