Expand wastewater treatment site capacity with WPL-Hybrid-SAF™

WPL’s patented Hybrid-SAF process technology employs a submerged moving-bed, fixed-film reactor which can treat wastewater with greater energy efficiency compared to traditional submerged aerated filters (SAFs), in a tighter site footprint whilst meeting environmental compliance.

Adaptable technology

A key advantage, the WPL Hybrid-SAF modular technology cells can be retrofitted into any onsite vessel, regardless of shape or size. This reduces the high cost of rebuilding infrastructure, minimises onsite disruption, reduces waste and optimises site footprint.

Containment vessel options

The WPL Hybrid-SAF consists of a containment vessel made in either GRP, GRP with a steel exoskeleton, steel, stainless steel or concrete.

The Hybrid-SAF is available as follows:

  •  Standardised modular packaged plant
  •  Custom-built cells
  •  Above or below ground

The modular cells can either operate as individual treatment plants or connected in series to form larger plants

Key benefits

  • Enhanced hydraulics for high-rate processing
  • Optimising new or existing vessels of any shape and size
  • Site footprint 30% smaller than comparable technologies
  • Energy consumption reduced in line with site footprint
  • Achieving <0.4mg/l ammonia discharge
  • Modular off-site build
  • Low maintenance
  •  Technology can be retrofitted in to existing on-site tanks

Our service extends to the hire of packaged wastewater treatment to ensure your site is not disrupted and compliant.

Images:  technology installed into an existing asset (left) standardised modular Hybrid-16 units (right)

Applications:

  • Utilities and municipal
  • Industrial (trade effluent) sites
  • Commercial sites
  • Ideal for environmentally-sensitive areas

 Quick links

Full features and benefits:

Specification:

Why you should choose the WPL Hybrid-SAF:


Low Maintenance

  • Fully optimised plant – maximum of one visual check a week
  • No mechanical or electrical moving parts within the cells
  • No need to drain tanks or remove the media during maintenance
  • No need to desludge process technology cells
  • Does not require additional equipment or adaptation to scour within the biological reactor
  • Cells can be removed, repaired and reinstalled individually without impacting on the process and discharge standard
  • No need for high-level access for internal maintenance


Installation and commissioning

  • Technology installed within days
  • Modular cells overcome site access restrictions
  • Off-site build significantly reduces installation time
  • Health and safety risk minimised
  • Can be delivered by Hiab loader crane
  • Reduced commissioning times


Design and off-site build

  • UK manufacture in a quality-controlled environment
  • 25-year design-life
  • Technology is patent pending
  • Interlocking modular units for larger capacities


Above ground standardised option

  • Scalable to accommodate growing populations
  • Cells can operate individually or connected in series to form a larger plant
  • Can redeploy elsewhere if existing installation becomes redundant before end-of-life


Repurpose of onsite vessels

  • CFD modelling carried out
  • Vessel scanned to ensure precision fit


Treatment standards

  • The technology meets high treatment standards for biochemical oxygen demand (BOD), ammonia, and soluble chemical oxygen demand (COD)
  • Additional equipment can be added to remove phosphorus (P)
  • The process can also be configured to provide anoxic conditions for nitrate (NO3) removal


Hydraulic design and control

  • Higher process treatment capacity achieved within each vessel, reducing the physical footprint, which in turn optimises energy per m³ treated
  • Hydraulic design ensures even and constant flows of nutrients and oxygen over the high specific surface area media, even during peak and low flow situations, providing ideal conditions for biological growth and treatment
  • The slow-moving media bed and hydraulic design ensure that the suspended solids that normally settle out are carried up and through the process to be captured in the final clarification stage


Options

  • Secondary and tertiary treatment process
  • Standardised or repurpose options
  • Telemetry control system for the blowers
  • Variable speed drive blowers can deliver 50-100% of design requirements, allowing greater headroom for power optimisation
  • Control kiosks with blowers, panels and optional telemetry equipment are also factory built to reduce onsite installation time


Fully compliant

  • WIMES specification
  • British Standards
  • European Norms
  • Designed to meet individual UK water utility specifications
  • Designed to BS12255 – parts 1 to 15


Standard technical specification

The standardised above ground modular Hybrid-16 option (containment vessel made in GRP with a steel exoskeleton) is within the Assets section on this page. For a containment vessel made in either GRP, steel, stainless steel or concrete, please contact WPL.

  • UK water utility and industrial site references

Ebbsfleet video (below) – The modular configuration of WPL packaged plant designed to be highly flexible – serving the town as it expands