The natural environment is inhabited by many species that exhibit very specific metabolic activities that may find industrial applications. The aim of the study was to select non-pathogenic cultures of bacteria of the...The natural environment is inhabited by many species that exhibit very specific metabolic activities that may find industrial applications. The aim of the study was to select non-pathogenic cultures of bacteria of the genus Clostridium and lactic acid bacteria able to convert glycerol into 1,3-propanediol (1,3-PD). Another aim of this study was to identify the isolates that best produced 1,3-propanediol both from pure and crude glycerol. The most efficient strains identified (Cl. butyricum) were analysed on a bioreactor scale. The aim was to determine temperature conditions on the efficiency and duration of 1,3-PD synthesis. The species Clostridium were identified using amplification of the 16S rRNA coding sequence. A total of 123 isolates (of the genus Clostridium and lactic acid bacteria) were isolated;a vast majority of these were able to synthesize 1,3-PD. The best results were obtained for Cl. butyricum strain DSP1, which was isolated from the rumen of a cow fed with glycerol. The strain efficiency using pure glycerol on bioreactor scale 0.65 mol/mol of glycerol at a temperature of 38℃ and a constant pH of 7.0.展开更多
Glycerol,as a byproduct of biodiesel production,can be used to produce a variety of high-value C_(1),C_(2),and C_(3)chemicals by electrocatalytic glycerol oxidation reaction(EGOR).Further coupling EGOR with CO_(2)redu...Glycerol,as a byproduct of biodiesel production,can be used to produce a variety of high-value C_(1),C_(2),and C_(3)chemicals by electrocatalytic glycerol oxidation reaction(EGOR).Further coupling EGOR with CO_(2)reduction reaction(CO_(2)RR)or hydrogen evolution reaction(HER)in paired electrolyzers is increasingly attractive due to the reduced input energy for the simultaneous formation of value-added products on both sides of the cell.This review article introduces the main reaction path of EGOR and the influencing factors of the reaction conditions of EGOR.The catalysts for the highly selective formation of glyceric acid,lactic acid,tartaric acid(TA),or formic acid(FA)from EGOR are highlighted.The latest research progress on design strategies of catalysts required for these reactions was reviewed.Subsequently,the paired electrolyzers coupling EGOR with HER or electrocatalytic CO_(2)RR were evaluated.Finally,the challenges and prospects in the field of EGOR are pointed out to move forward with the future development of glycerol electrocatalysis.展开更多
文摘The natural environment is inhabited by many species that exhibit very specific metabolic activities that may find industrial applications. The aim of the study was to select non-pathogenic cultures of bacteria of the genus Clostridium and lactic acid bacteria able to convert glycerol into 1,3-propanediol (1,3-PD). Another aim of this study was to identify the isolates that best produced 1,3-propanediol both from pure and crude glycerol. The most efficient strains identified (Cl. butyricum) were analysed on a bioreactor scale. The aim was to determine temperature conditions on the efficiency and duration of 1,3-PD synthesis. The species Clostridium were identified using amplification of the 16S rRNA coding sequence. A total of 123 isolates (of the genus Clostridium and lactic acid bacteria) were isolated;a vast majority of these were able to synthesize 1,3-PD. The best results were obtained for Cl. butyricum strain DSP1, which was isolated from the rumen of a cow fed with glycerol. The strain efficiency using pure glycerol on bioreactor scale 0.65 mol/mol of glycerol at a temperature of 38℃ and a constant pH of 7.0.
基金This paper was made possible as a result of a generous grant from the National Natural Science Foundation of China(NSFC,grant no.52074128)Basic Scientific Research Business Expenses of Colleges and Universities in Hebei Province,China(grant no.JYG2022001)Hebei Provincial Natural Science Foundation of China(grant no.H2022209089).
文摘Glycerol,as a byproduct of biodiesel production,can be used to produce a variety of high-value C_(1),C_(2),and C_(3)chemicals by electrocatalytic glycerol oxidation reaction(EGOR).Further coupling EGOR with CO_(2)reduction reaction(CO_(2)RR)or hydrogen evolution reaction(HER)in paired electrolyzers is increasingly attractive due to the reduced input energy for the simultaneous formation of value-added products on both sides of the cell.This review article introduces the main reaction path of EGOR and the influencing factors of the reaction conditions of EGOR.The catalysts for the highly selective formation of glyceric acid,lactic acid,tartaric acid(TA),or formic acid(FA)from EGOR are highlighted.The latest research progress on design strategies of catalysts required for these reactions was reviewed.Subsequently,the paired electrolyzers coupling EGOR with HER or electrocatalytic CO_(2)RR were evaluated.Finally,the challenges and prospects in the field of EGOR are pointed out to move forward with the future development of glycerol electrocatalysis.
