Pure SBR

Compact and flexible SBR plant capable of scaling to successfully treat a range of wastewater needs – municipal, commercial and industrial

Advanced WaStewater Treatment Solution

The PWS Pure SBR is a more efficient, reliable and robust improvement on continuous flow systems, with proven benefits that make for a greener and simpler solution to a number of different wastewater challenges. It is suitable for all biologically treatable waters, occupies comparatively little space and can recycle grey or black water without significant additional treatment. All this translates into a more environmentally and financially beneficial system.

The Pure SBR is easily installed, easily operated and maintained and is virtually odour free, which makes it ideal for new developments, country estates and commercial sites. It is also capable of growing as the development grows, with the reactors being installed in stages as and when they are required to treat additional flow. Furthermore, the Pure SBR still averages significantly lower energy consumption rates than alternative technologies, translating into further operating savings.


Suitable for all biologically treatable wastewaters
The Pure SBR technology has been used to treat effluents from food processing factories to caravan parks as well as municipal wastewater.

Grey or Black water recycling
The Pure SBR is ideal for use on sites where recycling of grey or black water is an important consideration due to its ability to produce very high quality effluent without requiring significant additional tertiary treatment.

Application as ‘side stream’ technology
Where existing works are struggling to cope with increased hydraulic and contaminant loads, a Pure SBR reactor can be installed in parallel to the process stream. A portion of the flow can be diverted to this reactor, treated to a good standard and then returned to the main process line. This technique reduces the strain on both the secondary and tertiary treatment equipment on-site and can significantly extend the life of an STW.

Phased Developments
When being installed for use with a new or growing development, the reactors can be installed in stages as and when they are required to treat additional flow. This makes it a very CAPEX competitive solution for developers looking to spread the cost of their development.

Treatment works likely to be subjected to contaminant and hydraulic shock loading
The Pure SBR technology has been designed and implemented successfully to treat flows with Flow to Full Treatments (FFTs) up to 6 times Dry Weather Flow (DWF). Flows arrive at an equalisation tank before being distributed to the reactors. If incoming influents are heavily contaminated, they can be held in this tank without being allowed to enter the reactor spaces and damage the naturally balanced ecology.


  • Small footprint – To meet suspended solids effluent standards below 10mg/l, no primary or tertiary clarifiers are required, translating in to significant space savings.
  • Competitive whole life costs – In addition to saving space, the lack of requirement for primary or tertiary clarifiers reduces the capital build cost of a works and also helps to reduce energy usage. Due to the batch nature of treatment, the process alters during periods of low flow to use less aeration and save energy.
  • Odour control – Pure SBR reactors are virtually odour free, even in very hot summers at full loading. If odour is of key concern then the screening, grit removal and sludge handling elements of the process can be housed within an indoor structure to guarantee odour control.
  • Easy to install – The Pure SBR can be installed in a variety of different configurations dependent on the specific site requirements. For example, where aesthetics are an issue the system can be predominantly submerged and covered. Aesthetically appealing structures can be used to house equipment and the system could be surrounded by a reed bed or integrated with a SuDS scheme. This would both enhance the appeal of the site, and act as a final polishing aid.
  • Easy to maintain – A high level of automation is involved within the Pure SBR including failsafes and alarm systems. Wastewater treatment plants would typically consist of two or more reactors. When maintenance is required within a reactor then it can be drained down. The remaining reactors will then deal with the flows whilst the maintenance is carried out.
  • Easy to operate with minimal training – Operating the Pure SBR system requires very little training for wastewater treatment plant operators. The plant and technology involved is no different to that found in traditional Activated Sludge works.
  • Low total sludge production – An extended sludge age leads to the breakdown of a greater amount of sludge than conventional AS processes. The Pure SBR therefore produces significantly less sludge than alternatives.
  • Low energy use – The Pure SBR averages an energy consumption rate of 0.6-1.2 kWh/kgBOD which is significantly lower than alternative technologies such as AS, IFAS, MBBR or MBR.