Ethanol production by Zymomonas mobilis CP4 from sugar cane chips

1981 ◽  
Vol 3 (12) ◽  
pp. 729-733 ◽  
Author(s):  
Z. P. Shalita ◽  
M. D. White ◽  
M. Katz ◽  
M. Zur ◽  
A. Mizrahi
Keyword(s):  
Ethanol Production ◽  
Sugar Cane ◽  
Zymomonas Mobilis

scholarly journals Sugar cane juice fermentation by Zymomonas mobilis CP4 subjected to inhibition by ethanol and high initial concentration of substrate

2000 ◽  
Vol 43 (4) ◽  
pp. 425-430
Author(s):  
Marcia S. Tano ◽  
João B. Buzato ◽  
Maria Antonia P. C. Celligoi
Keyword(s):  
Soybean Oil ◽  
Ethanol Production ◽  
Sugar Cane ◽  
Zymomonas Mobilis ◽  
High Concentration ◽  
Initial Concentration ◽  
Cane Juice ◽  
Sugar Cane Juice ◽  
High Initial Concentration

Sugar cane juice fermentation by Z. mobilis CP4 subject to stress by ethanol and high concentration of sucrose was investigated. Supplementation with saponifiable portion of soybean oil deodourising destillate (SOD) at 5; 10 and 15 mL/L.The ethanol production resulted values of 15.91; 16.99 and 15.63 g/L respectively. Values of Yp/s 0.35; 0.36 and 0.37 were achieved, which represented 20.69; 24.14 and 27.59% respectively higher when unsupplemented medium fermentation was carried out.

Ethanol production from sugar cane syrup using Zymomonas mobilis

1989 ◽  
Vol 11 (1) ◽  
pp. 25-36 ◽  
Author(s):  
Monica B. Doelle ◽  
Horst W. Doelle
Keyword(s):  
Ethanol Production ◽  
Sugar Cane ◽  
Zymomonas Mobilis

scholarly journals The Quorum Sensing Auto-Inducer 2 (AI-2) Stimulates Nitrogen Fixation and Favors Ethanol Production over Biomass Accumulation in Zymomonas mobilis

2021 ◽  
Vol 22 (11) ◽  
pp. 5628
Author(s):  
Valquíria Campos Alencar ◽  
Juliana de Fátima dos Santos Silva ◽  
Renata Ozelami Vilas Boas ◽  
Vinícius Manganaro Farnézio ◽  
Yara N. L. F. de Maria ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Quorum Sensing ◽  
Ethanol Production ◽  
N2 Fixation ◽  
Energy Demand ◽  
Zymomonas Mobilis ◽  
Biomass Accumulation ◽  
High Energy ◽  
Gram Negative ◽  
Expression Of Genes

Autoinducer 2 (or AI-2) is one of the molecules used by bacteria to trigger the Quorum Sensing (QS) response, which activates expression of genes involved in a series of alternative mechanisms, when cells reach high population densities (including bioluminescence, motility, biofilm formation, stress resistance, and production of public goods, or pathogenicity factors, among others). Contrary to most autoinducers, AI-2 can induce QS responses in both Gram-negative and Gram-positive bacteria, and has been suggested to constitute a trans-specific system of bacterial communication, capable of affecting even bacteria that cannot produce this autoinducer. In this work, we demonstrate that the ethanologenic Gram-negative bacterium Zymomonas mobilis (a non-AI-2 producer) responds to exogenous AI-2 by modulating expression of genes involved in mechanisms typically associated with QS in other bacteria, such as motility, DNA repair, and nitrogen fixation. Interestingly, the metabolism of AI-2-induced Z. mobilis cells seems to favor ethanol production over biomass accumulation, probably as an adaptation to the high-energy demand of N2 fixation. This opens the possibility of employing AI-2 during the industrial production of second-generation ethanol, as a way to boost N2 fixation by these bacteria, which could reduce costs associated with the use of nitrogen-based fertilizers, without compromising ethanol production in industrial plants.

scholarly journals Ethanol Production from Glucose and Xylose by Immobilized Zymomonas mobilis CP4(pZB5)

2000 ◽  
Vol 84-86 (1-9) ◽  
pp. 525-542 ◽  
Author(s):  
Mahesh S. Krishnan ◽  
Maria Blanco ◽  
Christopher K. Shattuck ◽  
Nhuan P. Nghiem ◽  
Brian H. Davison
Keyword(s):  
Ethanol Production ◽  
Zymomonas Mobilis

Production of ethanol from sugar cane molasses by Zymomonas mobilis

1982 ◽  
Vol 4 (4) ◽  
pp. 253-256 ◽  
Author(s):  
H. J. J. van Vuuren ◽  
Lourine Meyer
Keyword(s):  
Sugar Cane ◽  
Zymomonas Mobilis ◽  
Cane Molasses

Steam Ejector Used as a Substitute for Cooling Tower in the Ethanol Production Process

2009 ◽  
Author(s):  
Luiz Antonio Negro Martin Lopez ◽  
Daniel Kao Sun Ting ◽  
Alfredo Jose´ Alvim de Castro
Keyword(s):  
Global Warming ◽  
Production Process ◽  
Ethanol Production ◽  
Sugar Cane ◽  
Raw Materials ◽  
Cooling Water ◽  
Production Plant ◽  
Cooling Towers ◽  
Steam Ejector ◽  
Sugar Cane Juice

Nowadays petroleum dependency in transportation is widely discussed all over the world. Atmospheric pollution and global warming are deleterious consequences of gasoline consumption. Ethanol is a natural substitute fuel that has been increasingly used. One of the most important raw materials used for ethanol production is the sugar cane. The exothermic fermentation reaction of the sugar cane juice in the ethanol production process requires a rigorous temperature control. This control is usually made by using cooling water from cooling towers. The heat released from cooling towers not only has an economical cost as well as it contributes to the global heating. Steam ejectors can substitute cooling towers thus improving the ethanol production plant efficiency and reducing world heating. Furthermore, steam ejectors are smaller, cheaper and are very simple equipment when compared with cooling towers. Furthermore, its use provides an improved thermal efficiency of the production plant resulting in the reduction of the global warming effects. In this work the use of steam ejector is proposed for the fermentation cooling of a typical Brazilian sugar and ethanol production plant. The steam which feeds the steam ejector is obtained from the plant utilities and the low temperature obtained from steam expansion within the ejector is used for sugar cane fermentation process cooling. The steam ejector discharge heat is recovered as it is used to sugar and ethanol production process heating. The sugar and ethanol production plant overall energy fluxes either using cooling towers as well as using steam ejectors are presented and the results are compared and discussed.

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