Design your own MBBR with a handy calculation tool

05 May 2022 - Published by Charlotte Boeckaert
Nitrates in drainage water can be removed from water by means of a Moving Bed Biofilm Reactor (MBBR). This has been proved in several NuReDrain field cases. NuReDrain partner KU Leuven developed a tool to help third parties develop their own MBBR.


Bacteria in the Moving Bed Biofilm Reactor convert nitrates to nitrogen gas. To have this denitrification process as optimal as possible, it is important to create ideal conditions to accommodate the bacteria: i.e. enough food and pleasant temperatures. The happier the bacteria, the better the conversion rates!

Excel tool

Therefore, an optimal design of the MBBR reactor is important to ensure high removal efficiencies ranging between 60 to 90%. KU Leuven developed the MBBR design tool to assist you with the correct dimensioning of your reactor. It is an Excel spreadsheet which needs to be completed with information about amongst others the influent nitrate concentration, the water temperature and the flow. Based on this input, the reactor volume and the carbon dosing rate will be calculated.


Download the design tool here


Eager to know more about the MBBR working principlesRead the field case description.

Do you want to roll up your sleeves and build a MBBR yourselfConsult the DIY manual

If you have further questions about the moving bed biofilm reactor, contact NuReDrain’s project coordinator Charlotte Boeckaert: