Co-digestion of Sargassum sp. with glycerol and waste frying oil following a design of experiments

• Autor(es): Oliveira, João Vítor ; Alves, M. M. ; Costa, J. C.
• Data: 2014
• Identificador Persistente: http://hdl.handle.net/1822/31559
• Origem: RepositóriUM - Universidade do Minho
• Projeto/bolsa: info:eu-repo/grantAgreement/FCT/5876-PPCDTI/126270/PT ; info:eu-repo/grantAgreement/FCT/5876-PPCDTI/129146/PT ; info:eu-repo/grantAgreement/FCT/5876-PPCDTI/126270/PT
• Assunto(s): Anaerobic co-digestion; Design of experiments; Glycerol; Sargassum sp.; Waste frying oil
• Tipo de Documento: Comunicação em conferência
• Idioma: Inglês
• Contribuidor(es): Universidade do Minho

Descrição

A response surface methodology was adopted to assess the optimal conditions for methane production from the macroalgae Sargassum sp. co-digested with glycerol (Gly) and waste frying oil (WFO). Three variables were tested: % total solids of algae (%TSSargassum sp.), co-substrate concentration (gGly/WFO L-1); and, co-substrate type (Gly or WFO). The Biochemical Methane Potential (BMP) of Sargassum sp. was 181±1 L CH4 kg-1 COD. The co-digestion with Gly and WFO increased the BMP by 56% and 46%, respectively. The methane production rate (k), showed similar behaviour as the BMP, increasing 38% and 19% with Gly and WFO, respectively. The higher BMP (283±18 L CH4 kg-1 COD) and k (65.9±2.1 L CH4 kg-1 COD d-1) was obtained in the assay with 0.5% TS and 3.0 gGly L-1. Co-digestion with Gly or WFO is a promising process to enhance the BMP from the macroalgae Sargassum sp..