Related Experiment Video
Updated: May 1, 2026
14:53
Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol
Published on: October 24, 2016
11.0K
A novel solid state fermentation coupled with gas stripping enhancing the sweet sorghum stalk conversion performance
Hong-Zhang Chen1, Zhi-Hua Liu2, Shu-Hua Dai1
1State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
Biotechnology for Biofuels
|April 10, 2014
Summary
Gas stripping solid state fermentation (GS-SSF) enhances bioethanol production from sweet sorghum stalk. This method improves efficiency and yield compared to traditional methods, offering a continuous and simplified bioconversion process.
Area of Science:
- Biotechnology
- Biochemical Engineering
- Renewable Energy
Background:
- Bioethanol production from biomass is a growing global interest.
- Traditional static solid state fermentation (TS-SSF) faces challenges in mass/heat transfer and ethanol inhibition.
- Continuous production and high conversion efficiency are desired for industrial applications.
Purpose of the Study:
- To investigate gas stripping solid state fermentation (GS-SSF) for bioethanol production from sweet sorghum stalk (SSS).
- To compare the efficiency of GS-SSF with traditional static solid state fermentation (TS-SSF).
- To optimize GS-SSF parameters for enhanced ethanol yield and process simplification.
Main Methods:
- Comparative study of TS-SSF and GS-SSF with varying SSS particle thicknesses.
- Systematic investigation of GS-SSF parameters including gas stripping time, temperature, fermentation duration, and particle size.
- Evaluation of ethanol yield and stripping efficiency.
Main Results:
- GS-SSF achieved a significantly higher ethanol yield (22.7 g/100 g dry SSS) than TS-SSF.
- Optimal GS-SSF conditions (10 h stripping, 35°C, 28 h fermentation, 0.15 cm particle thickness) yielded 77.5% stripping efficiency.
- Reduced particle thickness (0.05 cm) increased ethanol yield by 30% in GS-SSF.
- GS-SSF improved mass/heat transfer, reduced ethanol inhibition, and simplified the process by integrating conversion and separation.
Conclusions:
- Solid state fermentation combined with gas stripping is a viable process for high-yield, efficient industrial bioethanol production.
- GS-SSF represents a novel bioconversion strategy for SSS biomass.
- The integrated continuous conversion and online separation achieved by GS-SSF streamline bioethanol production.
Keywords:
BioethanolCarbon dioxide weight lossEthanol stripping efficiencyGas stripping (GS)Particle thicknessSolid state fermentation (SSF)Sweet sorghum stalk (SSS)Traditional static solid state fermentation (TS-SSF)More Related Videos
Related Concept Videos
01:22Bioreactor Controls-III
67
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
67
01:25Production of Organic Acids
105
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
105
01:25Biofuels
107
The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
107
01:23Microbial Fermentation
1.8K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.8K
01:29Fermentation
97.1K
Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
97.1K
01:25Microbes in Beverage Production
298
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
298