Effect of acetate on fermentation production of butyrate

Sökning: L773:0576 9787 > Effect of acetate o...

Jaros, AdamLuleå tekniska universitet,Industriell miljö- och processteknik,Michigan State University, East Lansing MI 48824, USA (författare)

Validerad; 2012; 20120813 (ulrok)
A carbon source for the fermentation production of butyrate is xylose extracted from ligno-cellulosic material by hot water extraction. Although this auto-hydrolysis of hemicellulose can provide a low-cost source of xylose, the process generates a high level of acetic acid that might inhibit subsequent fermentations. This study focuses on the effects of acetate on the production of butyrate from xylose by batch fermentations with a selected strain Clostridium tyrobutyricum.At initial acetate concentrations of 17.6 g L-1 and 26.3 g L-1 in the media, C. tyrobutyricum cultures exhibited a lag phase (45 and 118 hours, respectively) in terms of sugar consumption, butyrate production and cell biomass growth, lowering the overall production rate. Butyrate fermentations performed with high concentrations of acetate in the media demonstrated a re-uptake of acetate into the butyrate production pathway and after the lag phase, all cultures adapted to the inhibitory acetate, which increased the final butyrate yields by 12.6% (32.6 g L-1 compared to 28.5 g L-1).

TEKNIK OCH TEKNOLOGIER Industriell bioteknik Bioprocessteknik hsv//swe
ENGINEERING AND TECHNOLOGY Industrial Biotechnology Bioprocess Technology hsv//eng
Clostridium tyrobutyricum
butyrate
xylose fermentation
hemicellulose utilization
acetate inhibition
Biokemisk processteknik
Biochemical Process Engineering

Rova, UlrikaLuleå tekniska universitet,Industriell miljö- och processteknik,Michigan State University, East Lansing MI 48824, USA(Swepub:ltu)ulrok (författare)
Berglund, KrisLuleå tekniska universitet,Industriell miljö- och processteknik,Michigan State University, East Lansing MI 48824, USA(Swepub:ltu)krib (författare)
Luleå tekniska universitetIndustriell miljö- och processteknik (creator_code:org_t)

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