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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...
Scale-Up Processes01:14

Scale-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...
Batch vs Continuous Culture01:14

Batch 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...
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...

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Updated: May 9, 2026

The Use of Drip Flow and Rotating Disk Reactors for Staphylococcus aureus Biofilm Analysis
08:08

The Use of Drip Flow and Rotating Disk Reactors for Staphylococcus aureus Biofilm Analysis

Published on: December 27, 2010

Current and future trends for biofilm reactors for fermentation processes.

Duygu Ercan1, Ali Demirci

  • 1Department of Agricultural and Biological Engineering, The Pennsylvania State University, University Park , Pennsylvania , USA and.

Critical Reviews in Biotechnology
|August 8, 2013
PubMed
Summary
This summary is machine-generated.

Biofilm reactors offer numerous advantages for wastewater treatment and product generation, including enhanced stability and reduced costs. Understanding biofilm formation is key to optimizing these beneficial microbial communities.

Keywords:
Biofilm formationbiofilm formation factorsbiofilm reactors applicationsbioprocessingvalue added products

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Last Updated: May 9, 2026

The Use of Drip Flow and Rotating Disk Reactors for Staphylococcus aureus Biofilm Analysis
08:08

The Use of Drip Flow and Rotating Disk Reactors for Staphylococcus aureus Biofilm Analysis

Published on: December 27, 2010

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
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Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods
11:47

Evaluation of the Efficacy of Organic Peroxyacids for Eradicating Dairy Biofilms Using an Approach Combining Static and Dynamic Methods

Published on: December 9, 2022

Area of Science:

  • Environmental Science
  • Biotechnology
  • Chemical Engineering

Background:

  • Biofilms exert both negative and positive environmental impacts.
  • Biofilm reactors offer advantages like reduced membrane fouling, lower costs, higher biomass density, and operational stability.
  • Microbial cells naturally attach to supports in biofilm reactors without chemical agents.

Purpose of the Study:

  • To review the principles of biofilm formation.
  • To discuss the properties of the biofilm matrix and their role in formation.
  • To explore factors enhancing biofilm formation, advantages/disadvantages, and industrial applications of biofilm reactors.

Main Methods:

  • Literature review of biofilm formation principles.
  • Analysis of biofilm matrix properties and influencing factors.
  • Examination of biofilm reactor advantages, disadvantages, and applications.

Main Results:

  • Biofilm formation is a natural process crucial for reactor function.
  • Biofilm matrix properties significantly influence formation and reactor performance.
  • Support materials and operational conditions can enhance biofilm development.

Conclusions:

  • Optimizing biofilm formation is essential for efficient biofilm reactor operation.
  • Biofilm reactors present a stable and cost-effective technology for various applications.
  • Further understanding of biofilm fundamentals can unlock broader industrial uses.