Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4996577 | Bioresource Technology | 2017 | 41 Pages |
Abstract
Biogas production from sugarcane vinasse has enormous economic, energy, and environmental management potential. However, methane production stability and biodigested vinasse quality remain key issues, requiring better nutrient and alkalinity availability, operational strategies, and knowledge of reactor microbiota. This study demonstrates increased methane production from vinasse through the use of sugarcane filter cake and improved effluent recirculation, with elevated organic loading rates (OLR) and good reactor stability. We used UASB reactors in a two-stage configuration, with OLRs up to 45 g COD Lâ1 dâ1, and obtained methane production as high as 3 L Lâ1 dâ1. Quantitative PCR indicated balanced amounts of bacteria and archaea in the sludge (109-1010 copies gâ1 VS), and of the predominant archaea orders, Methanobacteriales and Methanosarcinales (106-108 copies gâ1 VS). 16S rDNA sequencing also indicated the thermophilic Thermotogae as the most abundant class of bacteria in the sludge.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Valciney Gomes de Barros, Rose Maria Duda, Juliana da Silva Vantini, Wellington Pine Omori, Maria Inês Tiraboschi Ferro, Roberto Alves de Oliveira,