What Is A Porous Sparger?

What Is A Porous Sparger?


The term “porous sparger” may initially seem obscure. It’s a stainless steel device designed to

create air bubbles, ensuring consistent airflow and precise bubble size. Its primary function is to

blend gases into liquids without disruption efficiently. The device’s unique structure, made of sintered metal powder, features countless tiny pores, producing numerous small bubbles. This technology is crucial in various industries for mixing gas with liquid.


What Is the Working Principle of Porous Sparger?

A porous sparger disperses gas into a liquid through numerous small pores. This design creates many tiny bubbles, which is more effective than more giant bubbles produced by other methods like drilled tubes. The key aspects of a porous sparger include:

  1. Efficient Gas Distribution: The tiny pores ensure a uniform and efficient gas distribution throughout the liquid.
  2. Increased Surface Area: Smaller bubbles mean a larger surface area for gas-liquid interaction, improving the efficiency of processes like oxygenation in fermentation or aeration in wastewater treatment.
  1. Material and Design: Porous spargers are made from stainless steel or sintered glass, chosen for their chemical resistance and durability.
  1. Applications: They are widely used in bioreactors, chemical reactions, and environmental engineering, particularly in wastewater treatment.

In essence, porous spargers are effective for evenly distributing gas in a liquid, enhancing the efficiency of gas-liquid interactions in various industrial and laboratory processes.

What are the main applications of a porous sparger? 

The porous sparger emerges as a pivotal instrument in industrial mechanics, diversifying its utility across numerous sectors. Herein, we delve into a variety of its applications, offering insights into the multifaceted nature of porous spargers.

  1. Enhanced Microbubble Generation: Unlike conventional spargers, the porous variant generates diminutive bubbles, typically in 0.5 to 12 microns. This feature finds its prime application in fermentation processes, such as vinification, where it augments cellular proliferation by meticulously infusing oxygen.
  2. Culinary and Libation Industries: The sintered porous sparger, adept in gas-liquid interfusion, finds extensive use in the food and beverage domain. A notable application includes carbonating beer, thereby prolonging its freshness. Nitrogen sparging in juices and oils effectively supplants oxygen, enhancing shelf life.
  3. Aquatic Oxygenation: These spargers outperform their counterparts in gas generation by boasting a porosity as high as 55%. This characteristic makes them ideal for oxygenating aquatic environments like fish ponds and aquariums.
  4. Pharmaceutical Applications: Committed to safety, porous spargers crafted from non-toxic metals are indispensable in pharmaceutical contexts. The ozone sparger, for instance, plays a crucial role in water system sanitation, mitigating adverse effects.
  5. Eco-Friendly Chemical Processes: Our sintered porous spargers excel in gas-liquid transfer efficiency with porosity precision ranging from 0.5 to 12 microns. Their application in the green chemical sector facilitates enhanced oxygen quality, optimizing availability while curtailing expenses.
  6. Microalgae Cultivation: In the burgeoning fields of cosmetics, dietary supplements, and pharmaceuticals, microalgae serve as a fundamental raw material. Porous spargers are instrumental in escalating microalgae biomass and product yields within photobioreactors, amplifying profitability with reduced costs.


  1. Bioreactor Enhancement: The Saifilter air sparger significantly augments bioreactor performance with its superior chemical attributes. It ensures ample air or pure oxygen supply, enhancing reactions driven by enzymes or microorganisms.
  1. Hydrogenation Processes: Saifilter’s porous sparger is adept at hydrogen sparging for various chemical reactions, including hydrogen water filters and hydrogen-rich water makers. Its ability to generate nano-sized hydrogen bubbles facilitates their seamless integration with water molecules.

Upon perusing the applications above, one understands the widespread industrial utility of sintered porous spargers. Saifilter’s sintered stainless steel porous filter, composed of stainless steel 316L and accredited with FDA food-grade certification, is an exemplary choice for industries with stringent health and safety standards.


Recommendation of Porous Sparger

In selecting a superior porous sparger, our advocacy aligns with the Saifilter 316L stainless steel porous sparger, renowned for its FDA food-grade authentication. Herein, we expound upon a pair of these choices for your contemplation.

1. Stainless Steel 316 Micro Spargers and Filters in Bioreactors and Fermentors

At the heart of a bioreactor’s functionality is its adeptness in nurturing an ideal environment, thus propelling an organism’s abundant generation of a sought-after product.

  • Cellular biomass
  • Metabolic byproduct
  • Biocatalytic derivative

The air sparger is crucial in subdividing incoming air into minuscule, effervescent globules. Crafted with ingenuity, the sparger features an adapter of novel design, ensuring smooth integration with its respective sparger tip and easy removal after each batch cycle. This prevents the need for re-welding the information or cleansing the entire system. Characterized by its robustness and imperviousness to corrosion, the sparger’s porous structure shines in its mass transfer efficacy, imbuing the whole vessel.





  • Crafted from 316L alloy, this material is synonymous with culinary-grade robustness, ensuring safety and enduring use.
  • The dimension of effervescence it generates is remarkably expansive, ranging from 10 to 100 times greater than typical pore sizes.
  • Exhibits resilience in scorching temperatures and hostile, corrosive milieus while maintaining structural integrity.
  • It boasts an impressive capacity for enduring countless sterilization processes or can be disposed of after a single utilization.

Applications: Predominantly employed in large-scale fermentation apparatuses.


    Porous diffusion stone in fermenter              Oxygen sparger tube in chemical reactors


2. Sintered Microsparger in Bioreactor System for Green Chemistry industry

In green chemistry, the pivotal role of aeration and gas dispersion in fostering optimal oxygen mass transfer is paramount. This process lies at the core of microbial and cell

culture systems, facilitating the essential respiration required for vigorous cell growth and metabolic activity.

At the heart of this system lies the micron sparger ring, outfitted with micro spargers of 20 microns (or an option for even finer microns), engineered to deliver a maximum airflow of 0.1 VVM and an equal measure of oxygen. These diminutive spargers generate minuscule bubbles beneath the pitched blade impeller, ensuring their thorough amalgamation into the broth. This results in a uniform dispersion, optimizing oxygen availability for efficient mass transfer into the cells.




  • Aquaculture
  • Cosmetology
  • Human Nutritional Science
  • Pharmaceutical Development
  • Nutritional Supplements
  • Extraction of Natural Pigments

In crafting this innovative approach, the focus remains steadfast on utilizing less conventional terminology, weaving a tapestry of unique and profound words that remain comprehensible. This method ensures the content resonates with a professional tone, imbued with depth and complexity.


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