کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1275457 | 1497564 | 2012 | 10 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Impact of culture source and linoleic acid (C18:2) on biohydrogen production from glucose under mesophilic conditions Impact of culture source and linoleic acid (C18:2) on biohydrogen production from glucose under mesophilic conditions](/preview/png/1275457.png)
Genomic and statistical methods were used to demonstrate the effects of linoleic acid (LA) on hydrogen (H2) production in mixed anaerobic cultures from two sources (designated as A and B). The microbial composition of the control cultures CA and CB were statistically different. Bacteroidaceae (26%) and Clostridiaceae (10%) dominated CA whereas Clostridiaceae (33%) and Bacteroidaceae (10%) dominated CB. Homoacetogens directed 42% of the electron equivalents to acetate production and decreased the H2 yield by 50% in CA compared to CB. The maximum H2 yields (3.11 ± 0.02 and 3.11 ± 0.07 mol H2 mol−1 glucose in LA-treated cultures ALA and BLA, respectively) were statistically the same. Cultures ALA and BLA followed the acetate-butyrate pathway while CA and CB followed propionate and homoacetogenic pathways. LA-treated and control cultures were statistically different based on the type and quantity of metabolites; the differences were also confirmed by principal component analysis (PCA).
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► Impact of linoleic acid on hydrogen yield using different anaerobic cultures.
► Same maximum H2 yield for the two microbial cultures fed the same LA concentration.
► Propionate production was dominant in controls.
► Butyrate pathway was central in cultures fed LA.
► Cultures fed LA statistically different than controls based on genomic and statistical tools.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 5, March 2012, Pages 4036–4045