Sequencing batch reactor (SBR) sewage treatment plants 

Registered white Rewatec logo.
Residential model of the Rewatec Solido SBR sewage treatment plant

What is a sequencing batch reactor?

A sequencing batch reactor (SBR) treats wastewater in optimised batches using tried and tested biological processes that deliver exceptional reliability and efficiency. They are an ideal sewage treatment plant for residential or commercial projects striving for high performance, with minimal energy consumption. 

If your needs evolve after installation, our systems have the versatility to keep pace. They can be altered to cope with changes in population, periods of limited or no usage, and their treatment parameters can be personalised for your individual requirements. This is turn can reduce energy usage and as such, reduce your energy bills. 

Solido Smart 

The Rewatec Solido Smart is the next generation of domestic wastewater treatment. Suitable for a population of up to 25 people, it meets stringent UK regulations and exceeds the high demands of contemporary sewage treatment plants with regards to efficiency, performance and reliability.  

With a fully pre-assembled, plug and play design and a small tank footprint, the Rewatec Solido Smart is extremely quick and easy to install. Due it to its robust and reliable polyethylene design, it can also be installed in all groundwater environments. 


Our robust glass reinforced plastic (GRP) systems provide a reliable wastewater treatment solution for larger commercial and industrial applications.  

Manufactured as a single tank solution, our SBR GRP systems are suitable for a population of over 25 people. With a team of expert in-house engineers, we can design and manufacture a bespoke solution to meet virtually any wastewater treatment challenge or population requirement.

Solido Smart (8 to 10 PE)

​​​​​​Our most popular range of Rewatec Solido Smart, suitable for properties of up to 10 people, comes with a variety of features and benefits to provide an unrivalled wastewater treatment solution for those requiring an off-mains sewage treatment system. 

Benefits of a Rewatec Solido Smart sewage treatment plant

How do our SBR systems work?

Inside our SBR systems, intermittent aeration cycles break down solids and provide oxygen to microorganisms that feed on organic wastewater pollutants.

After aeration, remaining solids – including microorganisms – sink to the bottom of the tank. Some remain inside the tank to treat the next batch of wastewater and are known as activated sludge. Remaining solids are extracted and returned to the primary treatment tank or a sludge storage tank.

During periods of very high flow, the system can shift from a batch-flow strategy to a continuous-flow strategy with intermittent discharge. This versatility eliminates the need to overdesign the system to cope with fluctuating flow rates, and it has no effect on treatment performance.

Receiving system and final discharge

As solids settle on the bottom of the SBR, treated wastewater forms at the surface. A floating decanter with a solids-exclusion feature drains this wastewater so that it can be safely released into the environment.

SBR maintenance

Protect your investment in your SBR sewage treatment plant by having it regularly inspected and pumped by a qualified service professional.

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 a local professional to determine servicing that is right for you.

When your service provider visits your property to inspect your system, they should:

  • check for cracks and leaks in the tank
  • measure the scum and sludge layers
  • pump the SBR tank, if needed
  • clean the effluent filter in the outlet pipe
  • keep and update maintenance records for your system
  • explain any areas of concern and recommend next steps

Our SBR warranty

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 complete warranty for our sequencing batch reactor sewage treatment plants

Solido Smart 

  • Industry leading 25 year shell warranty 
  • 3 year Solido Smart technology warranty 
  • 3 year pump warranty (where applicable)

Solido Smart (pre-february 2022 model)

  • 10 year shell warranty
  • 3 year Solido Smart technology warranty
  • 1 year pump warranty (where applicable)


  • 25 year shell warranty  
  • 1 year electro-mechanical warranty

Activate your warranty

CPD training course

Our 45-minute CPD certified course "An introduction to off-mains wastewater management" is ideal for Architects, Consultants, Engineers, Installers and Specifiers looking to learn more about what wastewater treatment is and why it is important, regulatory bodies and the current UK regulations, how systems are designed, and what systems are available.

Request a CPD course

Rewatec Solido Smart 

With a robust a reliable design, and low running and maintenance costs, the Rewatec Solido Smart is the domestic sewage treatment plant for total peace of mind. It is suitable for a population of up to 25 people and can be supplied with a gravity or pumped outlet. 


Rewatec SBR GRP 

Manufactured in the UK as a single tank solution, our Rewatec SBR GRP sewage treatment plants are suitable for a population of over 25 people. With a team of expert in-house engineers, we can design and manufacture a bespoke solution to meet virtually any PE requirement, making it the ideal system for larger commercial and industrial applications.  


Additional options

Protect your property and preserve sensitive environments for future generations by adding additional dosing options to your Solido Smart sewage treatment plant.

Phosphorus removal 


Take wastewater treatment to another level and protect the rivers around your property with our safe and simple phosphorus removal solution - the Solido Smart +P.

Learn more

Rewatec phosphorus removal sewage treatment plant with a gravity discharge


Free quote

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

Request a quote