The Production of Ethanol from Micro-Algae Spirulina

Hossain, Md. Nahian Bin; Basu, Joyanta Kumar; Mamun, Md. Abdullah Al

doi:10.1016/j.proeng.2015.05.064

Cited by 41 publications

(13 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A similar result has also been reported by Abu Bakar et al [74], in which the maximum reducing sugars reported was 6.86 g/L at 72 h. According to Adela et al [32] the longer the enzymatic saccharification time, the higher the glucose yield obtained from the saccharification process. In another study by Hossain et al [75] the result showed that the glucose content for the oil palm waste residue continuously increased with the increase in the hydrolysis time. The high concentration of the reducing sugars was not only due to the cellulase activity, which produces glucose, but it also can be attributed to the hemicellulases in the biomass [73].…”

Section: Enzymatic Saccharification Of Pretreated Efbsmentioning

confidence: 95%

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

et al. 2022

View full text Add to dashboard Cite

A simultaneous saccharification and fermentation (SSF) optimization process was carried out on pretreated empty fruit bunches (EFBs) by employing the Response Surface Methodology (RSM). EFBs were treated using sequential acid-alkali pretreatment and analyzed physically by a scanning electron microscope (SEM). The findings revealed that the pretreatment had changed the morphology and the EFBs’ structure. Then, the optimum combination of enzymes and microbes for bioethanol production was screened. Results showed that the combination of S. cerevisiae and T. harzianum and enzymes (cellulase and β-glucosidase) produced the highest bioethanol concentration with 11.76 g/L and a bioethanol yield of 0.29 g/g EFB using 4% (w/v) treated EFBs at 30 °C for 72 h. Next, the central composite design (CCD) of RSM was employed to optimize the SSF parameters of fermentation time, temperature, pH, and inoculum concentration for higher yield. The analysis of optimization by CCD predicted that 9.72 g/L of bioethanol (0.46 g/g ethanol yield, 90.63% conversion efficiency) could be obtained at 72 h, 30 °C, pH 4.8, and 6.79% (v/v) of inoculum concentration using 2% (w/v) treated EFBs. Results showed that the fermentation process conducted using the optimized conditions produced 9.65 g/L of bioethanol, 0.46 g/g ethanol yield, and 89.56% conversion efficiency, which was in close proximity to the predicted CCD model.

show abstract

Section: Enzymatic Saccharification Of Pretreated Efbsmentioning

confidence: 95%

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Saccharification was carried out by acid catalyzed hydrolysis of biomass. 500 mg of oven dried and finely ground biomass was subjected to 2% H 2 SO 4 solution and autoclaved at 121 °C for 15mins ( Hossain et al, 2015 ). The hydrolysate was left for 48 h with continuous agitation at 200 rpm and 45 °C for further catalysis of carbohydrates to fermentable sugars.…”

Section: Methodsmentioning

confidence: 99%

Deciphering role of technical bioprocess parameters for bioethanol production using microalgae

Bibi

Yasmin

Jamal

et al. 2021

Saudi Journal of Biological Sciences

View full text Add to dashboard Cite

Microalgae biomass is considered an important feedstock for biofuels and other bioactive compounds due to its faster growth rate, high biomass production and high biomolecules accumulation over first and second-generation feedstock. This research aimed to maximize the specific growth rate of fresh water green microalgae Closteriopsis acicularis, a member of family Chlorellaceae under the effect of pH and phosphate concentration to attain enhanced biomass productivity. This study investigates the individual and cumulative effect of phosphate concentration and pH on specific growth characteristics of Closteriopsis acicularis in autotrophic mode of cultivation for bioethanol production. Central-Composite Design (CCD) strategy and Response Surface Methodology (RSM) was used for the optimization of microalga growth and ethanol production under laboratory conditions. The results showed that high specific growth rate and biomass productivity of 0.342 day −1 and 0.497 g L −1 day −1 respectively, were achieved at high concentration of phosphate (0.115 g L −1 ) and pH (9) at 21st day of cultivation. The elemental composition of optimized biomass has shown enhanced elemental accumulation of certain macro (C, O, P) and micronutrients (Na, Mg, Al, K, Ca and Fe) except for nitrogen and sulfur. The Fourier transform infrared spectroscopic analysis has revealed spectral peaks and high absorbance in spectral range of carbohydrates, lipids and proteins, in optimized biomass. The carbohydrates content of optimized biomass was observed as 58%, with 29.3 g L −1 of fermentable sugars after acid catalyzed saccharification. The bioethanol yield was estimated as 51 % g ethanol/g glucose with maximum of 14.9 g/L of bioethanol production. In conclusion, it can be inferred that high specific growth rate and biomass productivity can be achieved by varying levels of phosphate concentration and pH during cultivation of Closteriopsis acicularis for improved yield of microbial growth, biomass and bioethanol production.

show abstract

“…In the previous studies, the drying was carried out at the temperatures of 40, 60, 80, 100, 120, and 140 °C. The result showed that the drying at 60 and 80 °C can maintain the characteristics of the microalgae [12]. Using too low or too high temperature will affect the color, structure, carbohydrate and lipid composition [13].…”

Section: Introductionmentioning

confidence: 99%

The Drying Rate of Chlorella pyrenoidosa Using an Oven in Bioethanol Production

Megawati

Damayanti

Radenrara

et al. 2021

ARFMTS

View full text Add to dashboard Cite

The production of bioethanol from microalgae goes through several stages, including cultivation, harvesting, drying, storage, and conversion to bioethanol. Nearly 40% of the total energy consumed in the bioethanol production from microalgae is from drying. This research aims to study the drying rate model of Chlorella pyrenoidosa using an oven. The drying is carried out at the temperatures of 50, 60, and 70 oC. The initial moisture content of Chlorella pyrenoidosa was 317.798% dry weight. The results showed that at the temperatures of 50, 60, and 70 oC, the critical moisture content was 9.108, 7.583, and 6.93% dry weight, while the equilibrium moisture content was 3.172, 3.158, and 3.109% dry weight. The most optimal drying is at 70 oC and the drying rate gets faster as the temperature does too. The Page model is better at describing the drying rate of Chlorella pyrenoidosa using an oven than the Newton model. The drying speed constants (k) were 0.00056, 0.00061, and 0.00208, at 50, 60, and 70 oC, respectively.

show abstract

The Production of Ethanol from Micro-Algae Spirulina

Cited by 41 publications

References 3 publications

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

Simultaneous Saccharification and Fermentation of Empty Fruit Bunches of Palm for Bioethanol Production Using a Microbial Consortium of S. cerevisiae and T. harzianum

Deciphering role of technical bioprocess parameters for bioethanol production using microalgae

The Drying Rate of Chlorella pyrenoidosa Using an Oven in Bioethanol Production

Contact Info

Product

Resources

About