Moving bed biofilm reactors

rewatec white logo

What is a moving bed biofilm reactor?

A moving bed biofilm reactor (MBBR) is the ideal sewage treatment plant for commercial, community, institutional and industrial wastewater treatment projects with continuous fluctuations in flow and strength.

Rewatec glass reinforced plastic MBBR systems manage domestic and high organic loads in all seasons.


Rewatec moving bed biofilm reactor (MBBR)


Thanks to the modular design of our Rewatec MBBR systems, installations can be completed in phases and each component is perfectly adapted to the ground around it.


Example applications

  • caravan parks
  • service stations
  • pubs and restaurants
  • hotels and inns
  • commercial developments
  • residential developments
  • industrial applications
  • projects where space is limited

How do our MBBR systems work?

Primary treatment tank or fine screen

In typical installations, wastewater first flows into a primary treatment tank that allows liquids to separate from solids. Primary sludge that settles on the bottom of the tank requires removal by a licenced waste carrier as and when required.

In some systems, a fine screen is used instead of a primary treatment tank. This simple barrier removes wastewater solids before they can move downstream.

Equalisation tank (if needed)

After primary treatment, liquids move downstream and enter an equalisation tank. This tank collects wastewater from daily peak-use periods and then sends controlled doses to the Rewatec MBBR.

Rewatec MBBR

Inside the Rewatec MBBR, micro-organisms grow on floating biofilm media. They feed on organic wastewater pollutants, producing effluent composed of biomass particles and treated wastewater.

Our plastic biofilm media are specially shaped to increase the surface area on which micro-organisms grow. This maximises their ability to treat wastewater and helps you minimise the size of the reactor.

Biomedia used in a Rewatec SAF


Bubbles continuously mix the contents of the Rewatec MBBR to ensure optimal contact between wastewater and micro-organisms. Again, this improves their ability to remove wastewater pollutants.

Clarification tank and final discharge

After treatment in the Rewatec MBBR, wastewater flows into a clarification tank, where liquids are separated from biomass.

Sludge is sent back to the primary treatment tank or a sludge storage tank. Liquids are sent downstream for additional treatment or for safe discharge into the environment.

MBBR maintenance

Protect your investment in your MBBR sewage treatment plant by having it regularly inspected by Premier Tech.

The frequency of service depends on the size of your tank, the amount of wastewater your property generates, and the environmental regulations in your area. It is best to speak with us to determine servicing that is right for you.


Rewatec MBBR maintenance

We stand by our products

For over 50 years, we have proudly developed sustainable and long-lasting products that make a real difference for our customers, our professional partners, and, above all, our planet.

Our experience in the industry allows us to give you a 25 year warranty for our Rewatec MBBR sewage treatment plants and a 12-month warranty for our kiosks.

Rewatec 25 years warranty


Visit our office

​​​​​​At Premier Tech we strive to fully meet the requirements of our professional partners. If you require product functionality guidance or more detailed information for installations, we can provide a solution to meet your needs.

Contact us to find out more

Available products

We offer a complete range of bespoke Rewatec MBBR sewage treatment plants to meet your exact needs. Wherever your site, whatever the regulations, we have the right product to transform any challenge into a tailor-made solution.


UK lake on a sunny day

Free quote

We are here to help. Request a quote today and our team of experts will be in touch.

Request a quote