Production of biofuels from sweet sorghum juice via ethanol–methane two-stage fermentation

Takaki, M.; Li, Tan; Murakami, Toru; Tang, Youqi; Sun, Zhao Yong; Morimura, Shigeru; Kida, Kenji

doi:10.1016/j.indcrop.2014.10.009

Cited by 30 publications

(15 citation statements)

References 32 publications

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“…By increasing the dilution rate from 0.1 h À1 to 0.3 h À1 , the productivity markedly increased from (6.2 ± 0.2) g L À1 h À1 to (19.9 ± 0.5) g L À1 h À1 . This result was in accordance with the results of our previous studies, in which kitchen garbage [17], sweet sorghum juice [18], acid hydrolysate of wood biomass [19] and molasses [22] were the feedstock.…”

Section: Continuous Ethanol Fermentation Of Raw Juicesupporting

confidence: 93%

“…: 0.25 mm) and a flame ionization detector [19]. The concentration of cation was analyzed on an ion chromatography system (Dionex ICS-1100; CA, USA) [18]. The yeast number and their viability were calculated by the methylene blue method using a hemocytometer.…”

Section: Methodsmentioning

confidence: 99%

“…Mineral nutrients (g L À1 juice) were added into the raw juice before feeding: KH 2 PO 4 , 0.5; MgSO 4 $7H 2 O, 0.5; (NH 4 ) 2 SO 4 , 0.5. To enhance the flocculability of the yeast cells, CaCl 2 $7H 2 O was added to the raw juice to increase the Ca 2þ concentration to 1 g L À1 ; this was done according to the method described in our previous study [18]. The effects of the dilution rate and temperature on the continuous ethanol fermentation were investigated.…”

Section: Single-stage Fermentationmentioning

confidence: 99%

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Production of ethanol from raw juice and thick juice of sugar beet by continuous ethanol fermentation with flocculating yeast strain KF-7

Sun

Okamoto

et al. 2015

Biomass and Bioenergy

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Section: Continuous Ethanol Fermentation Of Raw Juicesupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Single-stage Fermentationmentioning

confidence: 99%

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Production of ethanol from raw juice and thick juice of sugar beet by continuous ethanol fermentation with flocculating yeast strain KF-7

Sun

Okamoto

et al. 2015

Biomass and Bioenergy

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“…Sweet sorghum is the most utilized crop for bio-based chemicals production in China, but it has been also recognized worldwide as an interesting feedstock [11]. It has already been used for the production of bioethanol or in two stage ethanol-methane production [12,13] and it is one of the most common feedstocks for bio-butanol production [14]. Sweet sorghum juice (SSJ) has also been used for the fermentative production of l-lactic acid.…”

Section: Introductionmentioning

confidence: 99%

Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

et al. 2019

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Sweet sorghum juice (SSJ) was evaluated as fermentation substrate for the production of l-lactic acid. A thermophilic Bacillus coagulans isolate was selected for batch fermentations without the use of additional nutrients. The first batch of SSJ (Batch A) resulted on higher lactic acid concentration, yield and productivity with values of 78.75 g∙L−1, 0.78 g∙g−1 and 1.77 g∙L−1 h−1, respectively. Similar results were obtained when the process was transferred into the pilot scale (50 L), with corresponding values of 73 g∙L−1, 0.70 g∙g−1 and 1.47 g∙L−1 h−1. A complete downstream process scheme was developed in order to separate lactic acid from the fermentation components. Coarse and ultra-filtration were employed as preliminary separation steps. Mono- and bipolar electrodialysis, followed by chromatography and vacuum evaporation were subsequently carried out leading to a solution containing 905.8 g∙L−1 lactic acid, with an optical purity of 98.9%. The results of this study highlight the importance of the downstream process with respect to using SSJ for lactic acid production. The proposed downstream process constitutes a more environmentally benign approach to conventional precipitation methods.

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“…Sweet sorghum juice (SSJ) in the stalk of sweet sorghum normally contains fermentable sugars at levels as high as 160–180 g L −1 . Recently, SSJ has been intensively studied as a raw material for bioethanol production . However, lactic acid production based on SSJ has received relatively little attention.…”

Section: Introductionmentioning

confidence: 99%

Repeated-batch fermentation of L-lactic acid from acid hydrolysate of sweet sorghum juice using mixed neutralizing agent under unsterilized conditions

Wang

Chang

Cai

et al. 2017

J. Chem. Technol. Biotechnol

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BACKGROUND Efficient bioconversion of biomass‐derived sugars and a mild process under unsterile conditions are key challenges for an economically and sustainably feasible process for L‐lactic acid fermentation. The open repeated‐batch fermentation of L‐lactic acid from sweet sorghum juice using mixed neutralizing agent is reported for the first time. RESULTS With the optimized mode of neutralizing agent addition (60 g L−1 sodium lactate and 40 g L−1 calcium lactate) and acid hydrolysate of sweet sorghum juice and yeast extract and salts medium, the L‐lactic acid titer, yield and productivity reached 102 g L−1, 0.942 g g−1 and 2.90 g L−1 h−1, respectively. Furthermore, corn steep powder substituting yeast extract and salts proved to be an efficient supplement to acid hydrolysate of sweet sorghum juice in this process. CONCLUSION Based on sweet sorghum juice, an open repeated‐batch fermentation process of L‐lactic acid using mixed neutralizing agent was developted. The good stability in long‐term operation over five batch fermentations indicates an efficient way of L‐lactic acid production from sweet sorghum juice. © 2017 Society of Chemical Industry

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Production of biofuels from sweet sorghum juice via ethanol–methane two-stage fermentation

Cited by 30 publications

References 32 publications

Production of ethanol from raw juice and thick juice of sugar beet by continuous ethanol fermentation with flocculating yeast strain KF-7

Production of ethanol from raw juice and thick juice of sugar beet by continuous ethanol fermentation with flocculating yeast strain KF-7

Production and Purification of l-lactic Acid in Lab and Pilot Scales Using Sweet Sorghum Juice

Repeated-batch fermentation of L-lactic acid from acid hydrolysate of sweet sorghum juice using mixed neutralizing agent under unsterilized conditions

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