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Related Concept Videos

Bioreactor Design and Operational System01:29

Bioreactor 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...
Bioreactor Controls-I01:28

Bioreactor Controls-I

Maintaining optimal conditions within fermenters is essential for maximizing microbial productivity and ensuring process efficiency. This lesson focuses on key parameters—temperature, foam, pH, carbon dioxide, oxygen, and pressure—and their precise measurement and control strategies in fermentation systems.Temperature ControlTemperature regulation is critical due to the exothermic nature of many fermentation processes. In small laboratory fermenters, temperature is commonly monitored using...
Bioreactor Controls-II01:18

Bioreactor 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...
Bioreactor Controls-III01:22

Bioreactor Controls-III

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...
Designing Growth Media for Bioreactors01:30

Designing 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...
Scale-Up Processes01:14

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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...

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Scale-Up of Mammalian Cell Culture using a New Multilayered Flask
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Development of a Jacketed Breathable Shake Flask With Process Monitoring, Control, and Bioreactor-Like Performance.

Vikash Kumar1,2, Chad Sundberg1,2, Venkatesh Srinivasan1

  • 1Center for Advanced Sensor Technology, University of Maryland Baltimore County, Baltimore, Maryland, USA.

Biotechnology and Bioengineering
|January 10, 2026
PubMed
Summary
This summary is machine-generated.

A novel jacketed breathable flask system overcomes limitations of traditional shake flasks by enabling real-time gas control. This innovation significantly enhances culture performance, boosting biomass and protein yield for bioprocess development.

Keywords:
bioreactor‐like flaskbreathable shake flaskjacketed breathable flaskmonitoring and controlshake flask bioreactor

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Area of Science:

  • Biotechnology
  • Bioprocess Engineering
  • Cell Culture Technology

Background:

  • Traditional shake flasks lack critical gas monitoring and control (dissolved oxygen, carbon dioxide).
  • This limitation hinders optimization and scalability in early-stage bioprocess development.
  • Oxygen limitation and suboptimal metabolic states are common issues in shake flask cultures.

Purpose of the Study:

  • To introduce and evaluate a jacketed breathable flask system for enhanced bioprocess control.
  • To assess the impact of real-time gas control on culture performance and metabolic profiles.
  • To demonstrate bioreactor-like capabilities in a high-throughput, cost-effective format.

Main Methods:

  • Development and implementation of a jacketed breathable flask system.
  • Cultivation of microorganisms across various media and fill volumes.
  • Real-time monitoring of dissolved oxygen, carbon dioxide, pH, and extracellular metabolites.
  • Comparison of culture performance (biomass, protein yield) against conventional flasks.

Main Results:

  • The system successfully deferred oxygen limitation and improved culture performance.
  • Achieved over 150% higher biomass and 140% greater recombinant protein yield compared to conventional flasks.
  • Reduced accumulation of oxygen-sensitive byproducts, indicating improved respiratory metabolism.
  • Demonstrated comparable biomass accumulation and specific growth rates to stirred tank bioreactors.

Conclusions:

  • The jacketed breathable flask system offers a scalable and accessible platform for upstream process optimization.
  • It provides bioreactor-like performance in a high-throughput, low-cost format, accelerating lab-scale biomanufacturing.
  • This technology enhances culture performance and metabolic efficiency, overcoming key limitations of traditional shake flasks.