TY - CPAPER TI - Comparative performance of cstr and internal solids recycling reactor for sewage sludge anaerobic treatment PY - 1991 AU - Vitoratto, Elso AU - Schmidell Netto, Willibaldo T2 - International Symposium on Anaerobic Digestion J2 - Poster-Abstracts PP - São Paulo PB - Finep ER -