Energy valorization of crude glycerol and sanitary sewage in hydrogen generation by biological processes

• Autor(a) principal: Varella Rodrigues, Caroline [UNESP]
• Data de Publicação: 2020
• Outros Autores: Oliveira Santana, Kamili [UNESP], Nespeca, Maurílio Gustavo [UNESP], Varella Rodrigues, Aline [UNESP], Oliveira Pires, Lorena [UNESP], Maintinguer, Sandra Imaculada [UNESP]
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.ijhydene.2020.02.168; http://hdl.handle.net/11449/201630
• topic: Biodiesel; Fermentation; Glycerol; Hydrogen; Microbial consortium

Biohydrogen production was studied with increased concentrations of crude glycerol (CG) co-digested with sanitary sewage by anaerobic consortium bacteria in anaerobic batch reactors, at 30 °C and initial pH 7.0. The CG was obtained during the biodiesel production from waste cooking oils (WCO). The anaerobic consortium was from a granular sludge of UASB reactor used in the treatment of poultry wastes heat treated to inhibit methanogenic activity previously. The higher H2 generation was observed with 240.0 g COD L−1 (35.82 mmol L−1), being consumed 63.9% of CG. The co-digestion associated with sanitary sewage facilitated the CG consumption with the increase of organic load, favoring the acetic acid and 1,3-propanediol production in a liquid phase of the reactors. These results are promising, contributing effectively to the treatment of both wastes with concomitant generation of bioenergy.