Related Experiment Video
Updated: Jul 11, 2026
06:17
Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions
Published on: August 15, 2019
Defined media and inert supports: their potential as solid-state fermentation production systems
L P Ooijkaas1, F J Weber, R M Buitelaar
1Department of Agrotechnology and Food Sciences, Food and Bioprocess Engineering Group, Wageningen University, The Netherlands. lydia.ooijkaas@algemeen.pk.wau.nl
Trends in Biotechnology
|July 19, 2000
Summary
Solid-state fermentation (SSF) on inert supports offers better control and consistency for producing valuable products like enzymes and metabolites. This method improves upon traditional cultivation on natural substrates for scientific and industrial applications.
Area of Science:
- Biotechnology
- Industrial Microbiology
- Bioprocess Engineering
Background:
- Solid-state fermentation (SSF) is utilized for producing high-value products.
- Traditional SSF uses natural solid substrates, posing challenges in process control.
Purpose of the Study:
- To explore the application of SSF using inert supports with chemically defined media.
- To highlight the advantages of this defined SSF system over traditional methods.
Main Methods:
- Impregnating inert supports with chemically defined liquid media for SSF.
- Cultivating microorganisms under controlled SSF conditions on inert supports.
Main Results:
- SSF on inert supports provides a more defined system for microbial cultivation.
- This approach offers improved process control and monitoring capabilities.
- Enhanced process consistency was observed compared to natural substrates.
Conclusions:
- SSF using inert supports and defined media is a promising approach for industrial bioproduct generation.
- The defined nature of this system leads to significant advantages in control and consistency.
- This method supports the efficient production of metabolites, biocontrol agents, and enzymes.
More Related Videos
Related Concept Videos
01:27Microbial Growth Media
Microbial growth media are essential tools in microbiology, providing the nutrients and conditions necessary to cultivate and study microorganisms. These media are categorized by their composition, consistency, and functional roles, enabling researchers to investigate microbial physiology, behavior, and interactions.Types and Consistencies of Growth MediaGrowth media can be solid, liquid, or semisolid. Solid media, often agar-based, allow visible colony growth for isolation and enumeration.
01:29Bioreactor Design and Operational System
Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
01:18Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...
01:30Designing Growth Media for Bioreactors
Growth media provide essential nutrients that support cell growth and metabolism, thereby enhancing the yield of valuable products such as enzymes, antibiotics, and biomass. Designing an effective growth medium involves balancing all components to prevent nutrient limitations or toxic excesses, both of which can impair growth and reduce product yields.Composition of a Typical Growth MediumA typical growth medium contains carbon and nitrogen sources, salts, vitamins, trace elements, and...
01:14Batch vs Continuous Culture
Fermentation is a foundational biotechnological process used to produce pharmaceuticals, biofuels, enzymes, and food additives. Among industrial strategies, batch and continuous fermentation are the two most widely applied. Although both rely on microbial conversion of substrates into desired products, they differ markedly in operation, productivity, and suitability for specific applications.Batch fermentation occurs in a closed system in which nutrient media and inoculum are added at the...
01:14Scale-Up Processes
The scale-up of microbial fermentation processes is essential in industrial biotechnology, allowing the transition from laboratory-scale experiments to commercial-scale production while aiming to maintain product yield and quality. This process requires meticulous adjustment of equipment design, process parameters, and contamination control strategies to accommodate increasing culture volumes.At the laboratory scale, cultures are typically maintained in 1 to 10-liter glass or autoclavable...