Kinetic model of continuous ethanol fermentation in closed-circulating process with pervaporation membrane bioreactor by Saccharomyces cerevisiae

Fan, Senqing; Chen, Shiping; Tang, Xiaoyu; Xiao, Zeyi; Deng, Qing; Yao, Peina; Sun, Zhaopeng; Zhang, Yan; Chen, Chunyan

doi:10.1016/j.biortech.2014.11.076

Cited by 40 publications

(12 citation statements)

References 26 publications

(53 reference statements)

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“…Not only active cells, but also dormant even dead cells also took part in the process. The product growth and kinetic formation affects the cells' response ability, so that kinetics study is important to assess the growth during the fermentation process, cited in [7][8][9].…”

Section: Resultsmentioning

confidence: 99%

Kinetic Growth of Saccharomyces cerevisiae in Non Dairy Creamer Wastewater Medium

2016

J Environ Stud

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Efforts in non dairy creamer (NDC) wastewater treatment can be performed by converting it into raw materials, i.e. as a medium for microorganisms growth. This research had an objective of examining the growth kinetics of Saccharomyces cerevisiae in the fermentation of the non dairy creamer wastewater for protein production. Kinetic study of the growth and fermentation is necessary as an introduction to understanding each process of the fermentation. The research applied an Experimental Design with a full factorial design. Treatments during the experiment consisted of P1 (NDC medium concentration of 25%), P2 (NDC medium concentration of 50%), P3 (NDC medium concentration of 75%), and P4 (NDC medium concentration of 100%). The cellular concentrate intakes were 105, 106, 107, and 108 cell/ml. The experiment resulted in specific growth rate (µ) of 0.240868 (hour-1), maximum specific growth rate (µmax) of 55.7479 (hour-1), with the highest protein contents of 22.15 mg/l at the concentration medium of 75%. IntroductionNon dairy creamer wastewater that migrates from waste disposal has been proven to cause pollution due to inadequate treatment. In addition to reducing water body quality, the wastewater also has bad smell, which also impacts the affected environment. The smell comes from organic compounds within the wastewater. Therefore, proper treatment is important to convert the wastewater into valuable raw materials.There have been many studies concerning wastewater as a more affordable growth medium for microorganisms in order to produce single cell proteins. However, none of the studies has done so with non dairy creamer wastewater. The use of Saccharomyces cerevisiae in the treatment of non dairy creamer wastewater is expected to have a promising prospect in producing single cell proteins. Single cell proteins are dry cells, which can be found in khamir, bacteria, and algae. These biomass microorganisms are potential sources of proteins for human food and livestock feed. The single cell proteins can be an alternative to fulfill the future needs for proteins because they contain particular proteins as well as carbohydrates, fat, mineral, and other nutrients for both human and animals, cited from [1][2][3]. The use of Saccharomyces cerevisiae in the non dairy creamer wastewater treatment is expected to be effective in the production of the single cell proteins.According to laboratory analysis, the non dairy creamer wastewater contained organic matters, in particular carbon in the form of carbohydrate, protein, and fat, so that they have a great potential to be a growth medium for microorganisms. One of the treatments of the non dairy creamer industry wastewater can be converting the wastewater into raw materials. These raw materials are useful for the medium of the microorganism fermentation developed in the production of the single cell proteins.The fermentation process can be assessed through fermentation kinetics. Kinetics study of the growth and fermentation is important as an introduction to understand...

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Section: Resultsmentioning

confidence: 99%

Kinetic Growth of Saccharomyces cerevisiae in Non Dairy Creamer Wastewater Medium

2016

J Environ Stud

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“…This model predicts the kinetic terms of bioethanol fermentation such as maximum rate of productivity, maximum bioethanol concentration and production lag time. These kinetic values can be used to scale up the bioethanol fermentation process 47,48 . Where, YP/S is the bioethanol yield, Pf and P0 are the final and initial bioethanol concentration (g/L), Sf and S0 are the final and initial sugar concentration (g/L).…”

Section: Prediction Of Kinetic Modelmentioning

confidence: 99%

Statistical Optimization of Saccharification Process Using Amorphophallus Paeoniifolius Tubers into Fermentable Sugars for Bioethanol Production in Stirred Tank Batch Reactor (STBR)

Rakshitha¹,

Keerthana²,

Anjuna³

et al. 2020

Preprint

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Current technologies for the production of biofuels from various renewable feedstocks have considerably captured vast scientific attention due to the fact that they can be used as an alternative fuels. Bioethanol being one of the most interesting biofuels and due to its positive impact on the environment has been categorised significantly in terms of scientific and technological investments. The aim of this study was to investigate, tubers of Amorphophallus paeoniifolius biomass as a feedstock for bioethanol production. The composition analysis of A.paeoniifolius tubers revealed high carbohydrate content (78.30 ± 0.33%). The feedstock was subjected to physicochemical pretreatment by treating with dilute acid followed by pressure cooking. The pretreatment factors were optimized by CCD using RSM approach. The optimum condition was found to be 1.32%v/v of HCl, 5.83%w/v of Elephant Foot Yam Biomass and 66.84 min of pressure cooking time yielding 45.87 g/L of total sugar. The second order polynomial equation was generated for the saccharification of the biomass and validated with R2 0.89. The fermentation of pretreated biomass in the presence of Saccharomyces cerevisiae MTCC170 yielded 22.12 ± 0.62 g/L of bioethanol at 120 h utilising 92% of initial total sugar. The resultant ethanol yield and productivity was estimated to be 0.51 g/g and 0.30 g/L.h respectively. The Gompertz model equation was applied to experimental data using nonlinear regression with the least square method and the kinetic fermentation parameters such as maximum ethanol concentration (Pm), production rate (rpm) and lag phase (h) were estimated to be Pm =21.90 g/L, rpm =0.57 g/L.h and tL =8.22 h.

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“…number of methods such as cell recycling [9,10], fermentation coupling with separation [11,12], optimizing fermentation conditions [13,14], and different fermenter designs [7]. However, these efforts faced limitations such as materials degradation, low mechanical strength and poor mass transfer, problems that have been often observed when using immobilization fermentation.…”

Section: Introductionmentioning

confidence: 99%

Feasibility Study on Long-Term Continuous Ethanol Production from Cassava Supernatant by Immobilized Yeast Cells in Packed Bed Reactor

Liu¹,

Zhao²,

Zou³

et al. 2020

J. Microbiol. Biotechnol.

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Kinetic model of continuous ethanol fermentation in closed-circulating process with pervaporation membrane bioreactor by Saccharomyces cerevisiae

Cited by 40 publications

References 26 publications

Kinetic Growth of Saccharomyces cerevisiae in Non Dairy Creamer Wastewater Medium

Kinetic Growth of Saccharomyces cerevisiae in Non Dairy Creamer Wastewater Medium

Statistical Optimization of Saccharification Process Using Amorphophallus Paeoniifolius Tubers into Fermentable Sugars for Bioethanol Production in Stirred Tank Batch Reactor (STBR)

Feasibility Study on Long-Term Continuous Ethanol Production from Cassava Supernatant by Immobilized Yeast Cells in Packed Bed Reactor

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