Sperta System
What is the Retention Time of MBR Tank

What is the Retention Time of MBR Tank?

Table of Contents

When it comes to wastewater treatment, every detail matters. One term that often pops up is “retention time.” But what does it mean, and why is it essential, especially in the context of MBR (Membrane Bioreactor) tanks?

The specific retention time of an MBR (Membrane Bioreactor) tank can vary based on several factors, including the system’s design, the type and concentration of pollutants in the wastewater, and the desired quality of the treated effluent. The retention time for MBR systems can range from a few hours to several days.

For instance:

  • The retention time might be between 3 to 10 hours in a municipal wastewater treatment setting.
  • For industrial wastewater with higher concentrations of pollutants, the retention time might be longer, possibly up to 24 hours or more.

Ready to dive deeper? Let’s explore the ins and outs of retention time in MBR tanks.

What Exactly is Retention Time?

Think of retention time as the time a drop of water spends inside the MBR tank. From the moment it enters until it’s treated and leaves the tank, that duration is its retention time. It’s like baking a cake; you need to keep it in the oven for the right amount of time to get the best results.

Why Does Retention Time Matter in MBR Tanks?

The right retention time ensures that pollutants in the wastewater have enough time to break down. It also gives the membrane in the MBR tank enough time to filter out any remaining contaminants. In short, retention time plays a significant role in ensuring the treated water is clean and safe.

What Factors Affect Retention Time in MBR Tanks?

Several things can influence retention time:

  • Tank Size: A bigger tank can hold more water, which means longer retention time.
  • Flow Rate: How fast wastewater enters and leaves the tank can change the retention time.
  • Type of Waste: Different pollutants might need more or less time to break down.
  • Conditions Inside the Tank: Temperature and pH can affect how fast reactions happen inside the tank.

How Does Retention Time in MBR Tanks Compare to Other Systems?

MBR tanks are designed to be efficient. This means they often have shorter retention times than older, traditional wastewater treatment systems. But even though the time is faster, the treatment is usually better because of the advanced technology in MBR tanks.

Can We Adjust the Retention Time?

Yes, we can! If tests show that the water coming out of the MBR tank isn’t as clean as it should be, we can look at retention time. By adjusting how fast water flows into and out of the tank, we can change the retention time to get better results.


Understanding retention time is vital to getting the best performance out of an MBR tank. By ensuring wastewater spends the right amount of time in the tank, we can ensure it’s treated properly and that the water that comes out is clean and safe.

The above is the information about the retention time of the MBR tank. If you still have questions about the membrane bioreactor or need to purchase MBR membranes, don’t hesitate to contact SPERTA.

Shanghai SPERTA Environmental Technology Co., Ltd. has specialized in producing water treatment products for many years. The company has the core technology of producing MBR membrane components. It has a high production capacity, aiming to build a high-quality brand of MBR production and sales all over the world. If you have any needs, please feel free to contact us.

Kevin Chen

Kevin Chen

Hi, I'm the author of this post and have been in this field for over 5 years. If you have questions regarding the MBR membrane products or want to purchase the MBR membrane, please feel free to contact me by email. kevin@spertasystems.com

Like this article?

Share on Facebook
Share on Twitter
Share on Linkdin
Share on Pinterest

More to explorer

When & How to Replace the MBR Membrane?

When & How to Replace the MBR Membrane?

MBR membrane has a good effluent quality and significant treatment effect and is often used in advanced sewage treatment. During operation, the MBR membrane may be damaged or polluted due to improper operation or other reasons, so it is necessary to make the replacement.

What's the lifespan of the MBR membrane?

What’s the lifespan of the MBR membrane?

The lifespan of the MBR membrane mainly depends on the type of water to be treated. There is still a certain difference in the service life of MBR membrane for municipal sewage and industrial sewage treatment.

How to Prevent Package MBR System Corrosion?

How to Prevent Package MBR System Corrosion?

Packaged MBR (Membrane Bioreactor) systems are integral to modern wastewater treatment processes, providing an efficient and compact solution for wastewater treatment. However, like all equipment that comes into contact with water and various chemicals, they are susceptible to corrosion.

Need MBR Membrane for your plants?
Get The Latest Updates

Subscribe To Our Newsletter

No spam, notifications only about new article updates regarding MBR membrane Technologies.

Sperta System

Ask For A Quick Quote

We will contact you within 6 hours, please pay attention to the email with the suffix “@spertasystems.com”.