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Which Industries Rely On Airlift Bioreactor Systems? Pharma, Biotech, Food

Jun 27,2026

Can you grow a vaccine, a probiotic drink and a lab protein in one tank? It can be, This is something many plants do every day. I have been working on airlift bioreactor systems for more than 10 years. I've seen this same tank solve problems in many fields.


The purpose of this article is to describe an airlift bioreactor. It will demonstrate how it works in easy steps. That's why it's used by pharma, biotech, and food teams. You will also learn about the pros and cons of airlift bioreactors, see a simple airlift bioreactor diagram and find out where this tank works best.

What Is An Airlift Bioreactor System?

Airlift bioreactor systems are tanks where air and liquid are combined. An airlift It does this without any spinning parts inside. Air enters from the bottom. The liquid is pushed back and forth by the air. This is the simple definition of airlift bioreactor used by most workers. 


The basic configuration of the airlift bioreactor consists of three main parts: riser, gas separator and downcomer. Some tanks use an internal loop airlift bioreactor, with a tube inside the main tank. Other tanks use an external loop airlift bioreactor with two tubes connected outside the tank. Both types belong to the same family, the airlift loop bioreactor.


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Key Parts Of An Airlift Bioreactor System

Part

What It Does

Loop Type

Where It Is Used

Riser

Moves gas and liquid up

Internal & External

All bioreactors

Downcomer

Sends liquid back down

Internal & External

All bioreactors

Gas Separator

Lets used air escape

Mostly external

Large tanks

Sparger

Put air in at the bottom

Internal & External

All bioreactors

Why Does The Pharma Industry Choose Airlift Bioreactors?

Pharma teams love airlift bioreactor systems for one big reason. Cells require a smooth mix, not a rough one. The mixing is done by air bubbles. No sharp edges to damage weak cells. This keeps drugs such as vaccines safe as they grow. Airlift bioreactor systems also provide even distribution of air in the tank. This design is used as the basis for safe, consistent batches in many clean drug plants.


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In a Pharma Production Line The tank is situated in a very clean room inside a pharma plant. Workers add cells, food, and air by closed pipes. This prevents germs. The riser throws the mix up. Gas escapes at the top. Then the liquid runs down again. This loop runs for many hours until the batch is ready. 

Pharma Use Cases By Bioreactor Type

Bioreactor Type

Product Made

Batch Size

Key Benefit

Internal Loop

Lab-made proteins

Small to mid

Small size

External Loop

Vaccines

Mid to large

Easy to clean

Airlift Loop

Antibody drugs

Large

Gentle on cells

Hybrid Airlift

Enzymes

Mid

Steady air flow


  • A gentle blend sustains the feeble cells

  • Fewer parts, fewer repairs

  • Easy to be enlarged for large batches

  • Uses less energy than other tanks

How Do Biotech Labs Use Airlift Loop Bioreactors?

Biotech labs grow algae and tiny living cells in airlift loop bioreactors. Air bubbles are mixed with cells and supplied to cells at the same time. This means fewer motors and fewer parts are needed. Labs like that, small test tanks and big tanks, have the same shape. Knowing the advantages and disadvantages of airlift bioreactor systems helps a lab choose the right size.

Biotech teams tend to start small, from the lab bench to pilot scale. One type of cell was tested in a tank of 5 liters. If it works well they move to a larger airlift bioreactor. The shape is the same, just larger. Hence the next step is fast and safe. Many new biotech teams have taken this same path.

Airlift Bioreactor vs Stirred Tank Bioreactor

Feature

Airlift Bioreactor

Stirred Tank Bioreactor

Mixing Method

Air bubbles

Spinning blade

Rough Force On Cells

Low

Higher

Power Used

Lower in most runs

Higher in most runs

Best For

Soft, weak cells

Thick, heavy liquids


Airlift tanks blend with air, not blades. It means less rough force against cells. Low cost and soft mix are the advantages of airlift bioreactor systems. The main disadvantage is less control with very viscos liquids.

Where Does The Food Industry Use Airlift Bioreactors?

Airlift bioreactor systems are used by food companies to grow yeast and good bacteria. This soft air mix helps keep these tiny living things strong and healthy. Good for yoghurt cultures, plant protein, and natural flavors. This tank is easy to clean which is why food plants like this tank. It also meets strict food safety standards.


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  • Making dairy and probiotic drinks

  • Growth of plant-based protein

  • Enzyme production and natural flavors

  • Animal feed protein

Real Food Industry Examples

Example

Product

Bioreactor Type

Result

Probiotic drink plant

Good bacteria culture

Internal loop

More live cells

Protein startup

Plant protein

External loop

Faster batches

Flavor maker

Natural vanilla flavor

Airlift loop

Cleaner taste

Dairy group

Yogurt starter culture

Internal loop

Fewer germs


These examples show how airlift tanks allow food makers to grow clean cultures rapidly and with fewer interruptions.

What Does An Airlift Bioreactor Diagram Really Show?

A simple diagram of an airlift bioreactor systems has three or four major parts. You'll see the riser tube where the air and the liquid are going up. Adjacent to this is the downcomer through which liquid flows downward. At the top, a gas separator vents out used air as the liquid cycles again.


  • Riser tube- up gas and liquid flow

  • Downcomer- liquid flows back down 

  • Gas separator- allows old air to vent

  • Sparger- feeds fresh air from below

Frequently Asked Questions

  • What is an airlift bioreactor used for? 

It uses air instead of a spinning part to grow cells, germs or algae. This keeps the culture safe and well mixed.

  • What is the difference between internal and external loop airlift bioreactors?

An internal loop has one pipe inside the tank. The external loop is two tubes connected externally to the tank.

  • What are the major benefits of airlift bioreactor systems? 

They blend gently, have simple passages and distribute air well. It is kind to living cells.

  • What are the disadvantages of airlift bioreactor systems? 

You have less control over mix speed. Thick liquids can be difficult to control, too.

  • Which are the main industries that utilize airlift bioreactors? 

They are mainly used by pharma, biotech and food companies for cells, vaccines and natural foods.

  • Which airlift bioreactor design should be selected? 

Think about your product and batch size. Then select an internal or external loop according to how soft the mix is ​​to be.

Conclusion

Pharma, Biotech and Food teams need tanks that are soft, simple and scalable. In many ways, airlift systems are good at that. Bailun Biotech (Jiangsu) produces airlift bioreactor systems and fermenter tanks from small lab size to large factory size. 


They supply pharma, biotech and food manufacturers around the world. Available in several sizes, they are well made and secure, making them a good choice for any team. If you want to purchase a new bioreactor, contact Bailun Biotech (Jiangsu) to know which tank meets your product and budget.



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