Review: protein value of distillers dried grains with solubles (DDGS) in animal nutrition as affected by the ethanol production process

Despite being considered renewable, corn (Zea mays) ethanol still generates much debate over the use of fossil fuels in its production and is considered less sustainable than sugarcane (Saccharum spp.) ethanol. In Brazil, corn ethanol is starting to be produced in the Center-West and is expected to increase with the RenovaBio, a promising policy for biofuels adoption. In this context, energy cane (Saccharum spp.) is a biomass crop with high yields that can provide bagasse to supply the energy demand of the corn ethanol industry and provide juice with about 10% sugar content. However, the effects of introducing its juice in the production process are unknown. For these reasons, the objective of this study was to assess the effects of adding energy cane juice in corn ethanol production. Energy cane juice brings several advantages: (i) It provides sugars that can reduce by almost 50% the amount of corn and enzymes used, (ii) reduces the amount of water needed for ethanol production, and (iii) increases significantly the fermentation efficiency from 86.4% to 90.8% by providing minerals that support yeast growth. Therefore, energy cane can be integrated into the corn ethanol production process, making the fermentation more efficient and the production systems more sustainable.

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

Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Heat Transfer Equipment; Heat Transfer in Electronic Equipment ◽

10.1115/ht2009-88641 ◽

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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Protein production potential in the ethanol production process from Jerusalem artichoke

Biotechnology Letters ◽

10.1007/bf01166220 ◽

1985 ◽

Vol 7 (6) ◽

pp. 443-446 ◽

Cited By ~ 3

Author(s):

N. Chabbert ◽

J. P. Guiraud ◽

P. Galzy

Keyword(s):

Production Process ◽

Ethanol Production ◽

Protein Production ◽

Jerusalem Artichoke ◽

Production Potential

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UJI KINERJA PADA PROSES PRODUKSI ETANOL MELALUI KOMBINASI PROSES FERMENTASI DAN STRIPPING

EKUILIBIUM ◽

10.20961/ekuilibrium.v11i2.2208 ◽

2012 ◽

Vol 11 (2) ◽

Author(s):

Margono Margono

Keyword(s):

Saccharomyces Cerevisiae ◽

Renewable Energy ◽

Production Process ◽

Ethanol Production ◽

Anaerobic Fermentation ◽

Fermentation Medium ◽

High Price ◽

Trickle Bed ◽

Trickle Bed Bioreactor ◽

Biofilm Development

Abstract: Renewable energy necesity have promote research on ethanol production technology. Ethanol is the potential renewable energy substituting gasoline. However, the conventional problem is high price of the ethanol. The objective of this research was to test the performance of alternative process in producing ethanol, i.e. combination of fermentation process with ethanol stripping in trickle bed bioreactor. The experimental was using Saccharomyces cerevisiae FNCC 3012 and sugarcane bagass as bed particle. It was devided into 2 process steps of biofilm development and ethanol production. Biofilm development was done by circulating medium in bioreactor aerobically. Duration of the biofilm development was 24 hours and followed by ethanol production step which was combinating anaerobic fermentation and stripping process using nitrogen. Production process was conducted for 36 hours lifetime. This method resulted biofilm developing in fermentation medium, not on baggas surfaces. Consequently, ethanol production happened in circulated fermentation medium. The productivity of this method of ethanol production process was not better than the conventional process. Neverherless, the experimental showed that the product stripping and fermentation could be done simultaneously. The stripping process increased ethanol product concentration up to 25% higher than in the broth. Keywords: ethanol, Saccharomyces cerevisiae FNCC 3012, trickle bed bioreactor, stripping, biofilm

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Fiber Separated from Distillers Dried Grains with Solubles as a Feedstock for Ethanol Production

Cereal Chemistry ◽

10.1094/cchem-84-6-0563 ◽

2007 ◽

Vol 84 (6) ◽

pp. 563-566 ◽

Cited By ~ 6

Author(s):

Radhakrishnan Srinivasan ◽

Bruce S. Dien ◽

Kent D. Rausch ◽

M. E. Tumbleson ◽

Vijay Singh

Keyword(s):

Ethanol Production ◽

Distillers Dried Grains

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Dynamics of microbial contaminants is driven by selection during ethanol production

10.1101/489500 ◽

2018 ◽

Cited By ~ 1

Author(s):

Luciano Lopes Queiroz ◽

Maria Silveira Costa ◽

Alcilene de Abreu Pereira ◽

Marcelo de Paula Avila ◽

Patrícia Silva Costa ◽

...

Keyword(s):

Species Richness ◽

Production Process ◽

Ethanol Production ◽

Production Efficiency ◽

16S Rrna Gene Sequencing ◽

Rrna Gene ◽

Increase Production Efficiency ◽

Community Assemblage ◽

Sequential Samples ◽

Rrna Gene Sequencing

AbstractBrazil is the second largest ethanol producer in the World and largest using sugarcane feedstock. Bacteria contamination is one the most important issues faced by ethanol producers that seek to increase production efficiency. Each step of production is a selection event due to the environmental and biological changes that occur. Therefore, we evaluated the influence of the selection arising from the ethanol production process on diversity and composition of Bacteria. Our objectives were to test two hypothesis, (1) that species richness will decrease during the production process and (2) that Lactic Acid Bacteria will become dominant with the advance of ethanol production due to selection. Bacterial community assemblage was accessed using 16S rRNA gene sequencing from 19 sequential samples. Temperature is of great importance in shaping microbial communities. Species richness increased between the Decanter and Must steps of the process. Low Simpson index values were recorded at the fermentation step, indicating a high dominance ofLactobacillus. Interactions betweenLactobacillusand yeast may be impairing the efficiency of industrial ethanol production.

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Effects of integrating a bioethanol production process to a kraft pulp mill

Nordic Pulp & Paper Research Journal ◽

10.3183/npprj-2010-25-02-p233-242 ◽

2010 ◽

Vol 25 (2) ◽

pp. 233-242 ◽

Cited By ~ 9

Author(s):

Jesse Kautto ◽

Kaj Henricson ◽

Herbert Sixta ◽

Mikaela Trogen ◽

Raimo Alén

Keyword(s):

Production Process ◽

Ethanol Production ◽

Kraft Pulp ◽

Black Liquor ◽

Pulp Mill ◽

Simulation Software ◽

Kraft Pulp Mill ◽

Excess Power ◽

Energy Balances ◽

Wood Consumption

Abstract The integration of an ethanol production process based on prehydrolysis of softwood chips to a kraft pulp mill is discussed. A simulation model of this biorefinery has been created with WinGEMS simulation software to calculate the mass and energy balances of the biorefinery and to examine the effects of the integration on the operation of the pulp mill. Integrating the prehydrolysis process to the modeled pulp mill producing 1000 Adt/day of pine pulp would increase the wood consumption by 16%. With the increased wood consumption, 40 t/day of ethanol could be produced, and the excess power production could be increased by 460 MWh/day. The integration of the ethanol production process to a pulp mill would have considerable effects on the operation of the pulp mill. The coupling of hydrolyzate evaporation with black liquor evaporation would require major modifications in the evaporation plant. Due to the burning of organic residue from the ethanol process and to the increase in the heating value of black liquor, the load on the recovery boiler would increase by 31%.

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