Simultaneous enzymatic saccharification and ABE fermentation using pretreated oil palm empty fruit bunch as substrate to produce butanol and hydrogen as biofuel

Ibrahim, Mohamad Faizal; Abd‐Aziz, Suraini; Yusoff, Mohd. Ezreeza Mohamed; Phang, Lai Yee; Hassan, Mohd Ali

doi:10.1016/j.renene.2014.12.047

Cited by 97 publications

(55 citation statements)

References 34 publications

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“…Higher phosphate buffer concentrations (more than 0.2 M) at higher initial pH values (6.0 and 6.5) were not favourable for the cell to produce butanol, but enhanced the formation of other solvents, i.e., acetone and ethanol. Ibrahim et al (2015). "Biobutanol production in buffer," BioResources 10(3), 3890-3907.…”

Section: Discussionmentioning

confidence: 99%

“…Results of this study will be useful for a simultaneous enzymatic saccharification and ABE fermentation, the demand for which has increased in recent years. Ibrahim et al (2015). "Biobutanol production in buffer," BioResources 10(3), 3890-3907.…”

Section: Effects Of Buffer On Abe Fermentationmentioning

confidence: 99%

“…The exact value of the threshold of acids is difficult to quantify, but it is in the range of 57 to 60 mM (Evans et al 1998), which is equivalent to about 4.44 g/L. Ibrahim et al (2012) reported that acid inhibition occurred when acid concentration was between 5 and Ibrahim et al (2015). "Biobutanol production in buffer," BioResources 10(3), 3890-3907.…”

Section: Effects Of Initial Ph Valuesmentioning

confidence: 99%

“…In addition, the cells were not able to maintain their metabolism at higher buffer concentrations. Ibrahim et al (2015). "Biobutanol production in buffer," BioResources 10(3), 3890-3907.…”

Section: Effects Of Buffer Concentrationsmentioning

confidence: 99%

“…OPFB has been tested as a carbon source for many fermentation processes including for renewable energy (Sumathi et al 2008). Some recent studies have been done on utilization of OPEFB for ABE fermentation Sklavounos et al 2013;Ibrahim et al 2015). However, one of the biggest challenges of utilizing lignocellulosic biomass including OPEFB is low sugar concentration to stimulate the cell for solvent production.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Buffering System on Acetone-Butanol-Ethanol Fermentation by Clostridium acetobutylicum ATCC 824 using Pretreated Oil Palm Empty Fruit Bunch

et al. 2015

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Change of pH has been identified as the most significant parameter in modulating the transition between the conversions of acids into solvents in acetone-butanol-ethanol (ABE) fermentation by Clostridia. Thus, ABE fermentation at various phosphate buffer concentrations and initial pH values was conducted using pure glucose and sugars derived from pretreated oil palm empty fruit bunch (OPEFB). A higher solvent concentration (2.93 g/L) was obtained in the fermentation using 20 g/L of glucose with buffer compared with one without buffer that produced 1.34 g/L of solvents. Approximately 8.77 and 9.15 g/L of solvents were produced from fermentation using 40 g/L of glucose with and without buffer, respectively. In the latter conditions, at an initial pH of 5.5, 8.77 g/L of solvents was obtained, which was the highest concentration compared to other initial pH values. Increasing the buffer concentration to 0.2 M at an initial pH of 6.0 resulted in acid accumulation of 16.83 g/L but reduced the solvent production to 1.36 g/L. In addition, ABE fermentation using 20 g/L of sugars from pretreated OPEFB produced 2.25 g/L of solvents with a yield of 0.13 g/g, which was comparable with fermentation using 20 g/L of glucose conducted in a buffering system.

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Section: Discussionmentioning

confidence: 99%

Section: Effects Of Buffer On Abe Fermentationmentioning

confidence: 99%

Section: Effects Of Initial Ph Valuesmentioning

confidence: 99%

“…In addition, the cells were not able to maintain their metabolism at higher buffer concentrations. Ibrahim et al (2015). "Biobutanol production in buffer," BioResources 10(3), 3890-3907.…”

Section: Effects Of Buffer Concentrationsmentioning

confidence: 99%