Bioconversion of crude glycerol from biodiesel production to hydrogen

Hydrogen production from glycerol by Escherichia coli and other bacteria: An overview and perspectives

“…; optimal conditions (pH 6.5, 37°C and 1 g L À1 glycerol in small volume of batch culture (50 mL in 120 mL serum bottle) were established. Interestingly, H 2 was suggested to be end product together with acetate and less butyrate; and methanol contained in crude glycerol was not utilized [94]. H 2 production rate from crude and pure glycerol was similar each with other [94], as in E. coli (see Table 2).…”

“…Interestingly, H 2 was suggested to be end product together with acetate and less butyrate; and methanol contained in crude glycerol was not utilized [94]. H 2 production rate from crude and pure glycerol was similar each with other [94], as in E. coli (see Table 2). New technology for H 2 production from glycerol containing dairy wastes has been evaluated with syntrophic consortium in single chamber microbial electrolysis cell [95].…”

“…Moreover, Mangahil et al [94] have reported about H 2 production from crude glycerol (pH $12; 45% glycerol) using enriched microbial community with dominated Clostridium sp. ; optimal conditions (pH 6.5, 37°C and 1 g L À1 glycerol in small volume of batch culture (50 mL in 120 mL serum bottle) were established.…”

Assessment of bio-hydrogen production from glycerol and glucose by fermentative bacteria

“…Recently several authors have investigated hydrogen production using glycerol as a substrate by fermentative bacteria. Mangayil et al [6] investigated optimal conditions (pH 6.5; 40 °C and 1 g/L raw glycerol) for hydrogen production using crude glycerol with microbial consortium mainly dominated by Clostridium species. Environmental conditions like medium pH and temperature are the major parameters to be controlled in the hydrogen production because they affect the qualitative and quantitative content of bacterial produced gas and the hydrogen yield and rate.…”

Processamento do glicerol bruto em reatores anaeróbios de leito fluidificado, acidogênico e metanogênico, em temperatura mesofílica

“…Observa-se na literatura uma lacuna no desenvolvimento e operação de reatores contínuos para a produção biológica de intermediários químicos, hidrogênio e metano a partir de glicerol bruto, sobretudo quando se estuda a configuração de reator anaeróbio de leito fluidificado (RALF), visto que para a produção de hidrogênio e intermediários químicos, verificam-se trabalhos fazendo uso de ensaios descontínuos (ITO et al, 2005;LO et al, 2013;MANGAYIL;KARP;SANTALA, 2012;SELEMBO, 2009) (FUENTES et al, 2009;WU;CHANG, 2003;ZHANG, Z. et al, 2007). Além disso, a utilização do processo fermentativo mesofílico é considerada atrativa do ponto de vista econômico e tecnológico, e se tratando de glicerol bruto, pode ser aplicado ao mesmo após aproveitamento de sua energia térmica no próprio processo produtivo do biodiesel, uma vez que a temperatura de saída do resíduo glicerol está acima da faixa mesofílica.…”