Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Bioreactor Controls-I

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-II

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...

Turbulent Flow: Problem Solving

Turbulent Flow: Problem Solving

Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...

Excess Pressure Inside a Drop and a Bubble

Excess Pressure Inside a Drop and a Bubble

The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Impact of Geriatric Assessment on Radiotherapy Intensity in Older Patients With Nonmetastatic Cancer: A Multi-institutional Study.

Clinical oncology (Royal College of Radiologists (Great Britain))·2025

Same author

Three-day intravesical instillation of anti-cancer drugs for prophylaxis of bladder cancer.

Oncology reports·2011

Same author

Detection of prostate specific antigen messenger RNA from pelvic lymph node in prostate cancer.

Urologic oncology·2011

Same author

Interobserver agreement in endoscopic evaluation of reflux esophagitis using a modified Los Angeles classification incorporating grades N and M: a validation study in a cohort of Japanese endoscopists.

Diseases of the esophagus : official journal of the International Society for Diseases of the Esophagus·2008

Same author

Creation of a novel cell penetrating peptide, using a random 18mer peptides library.

Die Pharmazie·2007

Same author

Complete nucleotide sequence of a Japanese isolate of Chrysanthemum virus B (genus Carlavirus).

Archives of virology·2007

Search research articles

Related Experiment Video

Updated: Jul 4, 2026

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO₂ Foam Transport in Fractured Unconventional Reservoirs

Published on: July 2, 2020

Mechanical control of foaming in a bubble column.

A Ohkawa¹, N Sakai, H Imai

¹Department of Chemical Engineering, Faculty of Engineering, Niigata University, 8050 Ikarashi 2-no-cho, Niigata City 950-21, Japan.

Biotechnology and Bioengineering

|July 1, 1984

Summary

This study optimized foam-breaking apparatus with a rotating disk (FARD) performance. Key factors include air sparge rate, liquid volume, liquid feed rate, and disk diameter for efficient foam control.

More Related Videos

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Related Experiment Videos

Last Updated: Jul 4, 2026

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO2 Foam Transport in Fractured Unconventional Reservoirs

Microfluidic Fabrication Techniques for High-Pressure Testing of Microscale Supercritical CO₂ Foam Transport in Fractured Unconventional Reservoirs

Published on: July 2, 2020

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

Published on: May 9, 2021

Area of Science:

Chemical Engineering
Fluid Dynamics
Separation Processes

Background:

Foam generation is a common issue in industrial processes, impacting efficiency and safety.
Conventional mechanical foam-breaking methods can be energy-intensive and less effective.
Rotating disk apparatus offer a potential alternative for efficient foam control.

Purpose of the Study:

To evaluate the impact of operational parameters on the foam-breaking performance of a rotating disk apparatus.
To determine optimal conditions for foam destruction in bubble column systems.
To compare the efficacy and power requirements of the rotating disk apparatus against conventional methods.

Main Methods:

Experimental investigation of foam-breaking performance under varying air sparge rates, working liquid volumes, liquid feed rates, and disk diameters.
Analysis of critical disk rotational speed for foam reduction.
Quantitative prediction of operational limits and power requirements.

Main Results:

Reduced air sparge rate and working liquid volume decreased the critical disk speed for foam breaking.
Increased liquid feed rate and disk diameter also lowered the critical disk speed.
Effective ranges for disk diameter and liquid feed rate were identified for optimal foam breaking.

Conclusions:

The foam-breaking apparatus with a rotating disk (FARD) demonstrates superior foam-breaking performance and lower power requirements compared to spray-type apparatus.
Operational parameters significantly influence the efficiency of the FARD.
The study provides quantitative insights for optimizing FARD operation in industrial applications.