Production of ethanol from mesquite [Prosopis juliflora (SW) D.C.] pods mash by Zymomonas mobilis in submerged fermentation

Scientia Agricola

Celiane Gomes Maia Da Silva²  Samara Alvachian Cardoso Andrade¹  Alexandre Ricardo Pereira Schuler¹  Evandro Leite De Souza¹  Tânia Lúcia Montenegro Stamford¹ 

[1] ,UFRPE Depto. de Ciências Domésticas Recife PE ,Brasil

关键词: renewable sources;    bioconversion;    fermentative parameters;    fontes renováveis;    bioconversão;    parâmetros fermentativos;   

DOI  :  10.1590/S0103-90162011000100019

来源: SciELO

【 摘 要 】

Mesquite [Prosopis juliflora (SW) D.C.], a perennial tropical plant commonly found in Brazilian semi-arid region, is a viable raw material for fermentative processes because of its low cost and production of pods with high content of hydrolysable sugars which generate many compounds, including ethanol. This study aimed to evaluate the use of mesquite pods as substrate for ethanol production by Z. mobilis UFPEDA205 in a submerged fermentation. The fermentation was assessed for rate of substrate yield to ethanol, rate of ethanol production and efficiency of fermentation. The very close theoretical (170 g L-1) and experimental (165 g L-1) maximum ethanol yields were achieved at 36 h of fermentation. The highest counts of Z. mobilis UFEPEDA-205 (both close to 6 Log cfu mL-1) were also noted at 36 h. Highest rates of substrate yield to ethanol (0.44 g ethanol g glucose-1), of ethanol production (4.69 g L-1 h-1) and of efficiency of fermentation (86.81%) were found after 30 h. These findings suggest mesquite pods as an interesting substrate for ethanol production using submerged fermentation by Z. mobilis.

【 授权许可】

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