Document Type : Original Research Paper
Division of Graduate and Research Studies, Technological Institute of Boca del Río, Veracruz, México
School of Chemistry, Veracruzana University Prolongación Oriente, Veracruz, México
The Cane alcohol vinasse assessment on the removal efficiency of a fixed biomass anaerobic reactor (FBAR) was evaluated. Crude vinasse was used to feed the reactor. The FBAR was operated with organic load rate (OLR) of 0.5, 1, 3 and 6 gCOD/L/d. Removal efficiencies of 85, 82, 75 and 66 per cent were observed respectively. The FBA reactor presented an excellent removal of organic matter, however, when more than OLR of 3 gCOD/L/d, an unexpected behavior began, it reduced its capacity. The average biogas production was 1.925, 2.613, 5.653 and 8.290 L for OLR of 0.5, 1, 3 and 6 gCOD/L/d respectively. The methane content in biogas was 56, 79, 89 and 82 per cent, in each OLR tested. Methane production was 1.070 L for an OLR 0.5 gCOD/L/d, 2.070 L on an OLR of 1 gCOD/L/d, 5.046 L with OLR of 3 gCOD/L/d and 6.800 L to OLR of 6 gCOD/L/d. Methane performance was used as monitoring parameter, this parameter gives information of the value between the catabolic activity (methane production) and the anabolic activity (bio-film production). The average YCH4, values were 0.304, 0.302, 0.306 and 0.205 LCH4/gCODremoved, respectively. The thermoplastic support inoculated in the FBA reactor and fed with crude vinasse, acted as a filter, plus getting good results in removal of chemical oxygen demand (COD), but because of the size and height of the filling, the methane evacuation stopped.