The standard ATAC SAF units range from ATS24, ATS32, ATS44, to ATS55; however,
bespoke SAFs can be designed and manufactured depending on specific requirements.
SAFs can provide treatment for a range of populations and loadings. These units can
be installed above or below ground, providing flexibility in their configuration to suit
site requirements. ATAC SAF units utilise a series of individual cells through which the
wastewater flows to maximize retention time. Each cell contains rigid block media with
a high specific surface area, promoting the growth of biomass. Fine bubble diffusers
provide even air distribution and maximum oxygen transfer efficiency to each cell.
This process allows the SAF to effectively remove contaminants from the wastewater,
producing clean effluent.
The operational processes of SAF
units are designed for robustness,
reliability, and minimal operator
involvement. The wastewater
enters the first cell of the SAF unit
and flows through the biomass
media. The biomass feeds on the
organic matter present in the
wastewater, reducing the levels of
BOD (Biochemical Oxygen Demand)
and other contaminants. The clean
effluent then exits at the surface of
the final cell. SAF units are equipped
with air control valves near access
hatches, allowing for easy access
and accurate process trimming to
optimise performance.
Versatile Applications
SAF units can be used in various
applications, including stand-alone
treatment, emergency cover during
refurbishment or breakdowns of
other systems, supplementing or
replacing existing systems, and as
part of a complete sewage treatment
works.
SAF units require minimal operator involvement
and maintenance. The lack of moving
parts and the use of stainless steel in their
construction contribute to their low maintenance
needs. However, regular inspections and
occasional servicing are necessary to ensure
optimal performance.
High Treatment Efficiency
SAF units are designed to meet stringent effluent
quality standards. Typical effluent quality
after treatment by SAF units and settlement
can easily meet 20mg/l TSS (Total Suspended
Solids), 10mg/l BOD (Biochemical Oxygen Demand),
and 5mg/l Ammoniacal nitrogen as N,
or better, with results verified by the Environment
Agency.
Emergency Hire Units Available
SAF units are available for emergency
hire. These units provide a temporary
solution to maintain wastewater
treatment while repairs are being
carried out. The hire units are easily
transported and can be delivered
by HIAB lorry for convenient
offloading. Additionally, installation
and commissioning services are
available to ensure the seamless
integration of the emergency hire
units into the existing wastewater
treatment infrastructure.
