AnSBBR applied to biomethane production for vinasse treatment: effects of organic loading, feed strategy and temperature

Abstract This study assessed the feasibility of an anaerobic sequencing batch and fed-batch biofilm reactor (AnSBBR) with mechanical stirring for vinasse treatment and biomethane production. The amount of liquid medium used was 3 L, and the treated volume was 1 L per cycle. The cycle time was 8 h, with feeding times of 10 min (batch mode) and 240 min (fed-batch mode). Methane productivity increased with the increase in organic load from 1.0 to 10.0 gCOD.L-1.d-1. The maximum molar productivity and yield of methane were 123.4 molCH4.m-3.d-1 and 13.8 mmolCH4.gCOD-1 (88% of the theoretical), respe...