Improvement of ethanol production from sweet sorghum juice under batch and fed-batch fermentations: Effects of sugar levels, nitrogen supplementation, and feeding regimes

Phukoetphim, Niphaphat; Salakkam, Apilak; Laopaiboon, Pattana; Laopaiboon, Lakkana

doi:10.1016/j.ejbt.2017.01.005

Cited by 40 publications

(23 citation statements)

References 19 publications

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“…2) Substrate composition Analysis of substrate composition showed that pomelo peel contains lower values for pH, ash, moisture, and TKN than banana peel, with higher values for total solids, volatile solids, COD, and sugar ( Table 2). Substrate composition, especially initial sugar concentration, is an important factor influencing ethanol production by the yeast strain [25]. According to the theoretical equation for biological ethanol fermentation, 1 mole of glucose will be converted to 2 moles of ethanol and 2 moles of carbon dioxide, and so higher yields can be expected using pomelo peel as substrate.…”

Section: Figurementioning

confidence: 99%

Utilization of Fruit Waste for Bioethanol Production by Co-cultures of Aspergillus niger and Saccharomyces cerevisiae

Chamchoi

2019

App. Envi. Res.

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The purpose of this research was to study the effectiveness of simultaneous fermentation offruit waste with co-cultures of Aspergillus niger TISTR 3063 and Saccharomyces cerevisiaeTISTR 5606 in production of ethanol. The effect of fermentation temperature on ethanol yield was also observed. Pomelo and banana peels were selected as substrates and prepared by chopping into small rectangular pieces. Fermentation of batches of fruit waste was carriedout using a 250mL Erlenmeyer flask with glucose as a control. Analysis of the composition of the fruit waste included sugar, pH, TS, VS, ash, moisture, COD and TKN. From the results, it was found that maximum yields of 90.71% and 104.90% for pomelo and banana peel, respectively, were achieved at a temperature of 40°C within 24 h. The analysis also showed that fermentation temperature affected ethanol yield. When the fermentation temperature was raised from 30°C to 40°C, maximum ethanol yield from pomelo peel fermentation with10% of inoculum was increased from 73.86% to 90.71%, significant at p-0.05 Maximum yield from banana peel fermentation showed a similar trend. This study establishes the potential for upgrading fruit wastes such as pomelo and banana peels as high value substrates for ethanol production. Pomelo peel in particular shows high potential as a substrate for ethanol fermentation at 40°C for 24 h, with inoculum of 10% (w/w) of each fungus and yeast.

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Section: Figurementioning

confidence: 99%

Utilization of Fruit Waste for Bioethanol Production by Co-cultures of Aspergillus niger and Saccharomyces cerevisiae

Chamchoi

2019

App. Envi. Res.

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“…In 2017, 2718 t of oil equivalents (toe) of bioethanol was consumed for transport in Europe, of which 121 toe was consumed by the Netherlands [33]. Although much research has been done on the ethanol production from lignocellulosic biomass [34][35][36][37][38][39][40][41][42][43][44], the economic viability of a bioethanol plant in the Northern Netherlands is yet unknown. Therefore, this research aims to investigate the feasibility of a bioethanol plant treating organic residues (sugar beet pulp and grass straw) in the Northern Netherlands.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Assessment of a Bioethanol Plant in the Northern Netherlands

et al. 2019

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Due to the exhaustion and increased pressure regarding the environmental and political aspects of fossil fuels, the industrial focus has switched towards renewable energy resources. Lignocellulosic biowaste can come from several sources, such as industrial waste, agricultural waste, forestry waste, and bioenergy crops and processed into bioethanol via a biochemical pathway. Although much research has been done on the ethanol production from lignocellulosic biomass, the economic viability of a bioethanol plant in the Northern Netherlands is yet unknown, and therefore, examined. In this thesis, the feasibility study of a bioethanol plant treating sugar beet pulp, cow manure, and grass straw is conducted using the simulation software SuperPro Designer. Results show that it is not economically viable to treat the tested lignocellulosic biomass for the production of bioethanol, since all three original cases result in a negative net present value (NPV). An alternative would be to exclude the pretreatment step from the process. Although this results in a lower production of bioethanol per year, the plant treating sugar beet pulp (SBP) and grass straw (GS) becomes economically viable since the costs have significantly decreased.

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“…The positive interaction between these two independent variables indicates that there is a synergetic effect of the initial sugar concentration and fermentation time on bioethanol production. In the model for yeast cell number, the linear regression coefficient and the square coefficient of the initial sugar content are significant, which can be explained by the fact that the initial carbon source concentration has a direct effect on microbial cell growth as well as on its viability and metabolic activity [21,22]. In the model for the residual sugar content, the interaction coefficient of the initial sugar content and fermentation time is significant.…”

Section: Bioethanol Production By Distiller′s Yeastmentioning

confidence: 98%

Optimization of bioethanol production from soybean molasses using different strains of Saccharomyces cerevisiae

Rončević

Bajić

Dodić

et al. 2019

Hem Ind

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Bioethanol technology represents an important scientific research area because of the high market value and wide availability of its primary and by-products. Worldwide interest in utilizing bioethanol as a renewable and sustainable energy source has significantly increased in the last few years due to limited reserves of fossil fuels and concerns about climate change. Therefore, improvement of the bioethanol production process is a priority research field at the international scale, due to both economic and environmental reasons. The aim of this study was to optimize production of bioethanol from soybean molasses based media using response surface methodology. Three different strains of the yeast Saccharomices cerevisiae, commercially available in dried form, were used as production microorganisms, and the best results were obtained by using dried baker's yeast. The results of optimization of alcoholic fermentation using dried baker's yeast indicate that the highest value of the overall desirability function (0.945) is obtained when the initial sugar content is 18.10 % (w/v) at the fermentation time of 48.00 h. At these conditions the model predicts that bioethanol concentration is 8.40 % (v/v), yeast cell number 2.21·10 8 cells/mL and the residual sugar content is 0.35 % (w/v).

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Improvement of ethanol production from sweet sorghum juice under batch and fed-batch fermentations: Effects of sugar levels, nitrogen supplementation, and feeding regimes

Cited by 40 publications

References 19 publications

Utilization of Fruit Waste for Bioethanol Production by Co-cultures of Aspergillus niger and Saccharomyces cerevisiae

Utilization of Fruit Waste for Bioethanol Production by Co-cultures of Aspergillus niger and Saccharomyces cerevisiae

Feasibility Assessment of a Bioethanol Plant in the Northern Netherlands

Optimization of bioethanol production from soybean molasses using different strains of Saccharomyces cerevisiae

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