High-performance sewage treatment system

High-performance sewage treatment system for sites with 25–2000 persons

The HiPAF® SAF (Submerged Aerated Filter) is a market-leading sewage treatment system. Its simple and innovative design combines efficient processing and reliability contained within a robust GRP construction.

Designed to order the system features:

Guaranteed performance
Techology used by all the major Water Utilities
Innovative and simple process
No moving parts
Minimal visual impact
Small installation footprint
Able to cope with variable flows

Camping and caravan sites
Construction Sites
Garden centres
Golf and leisure centres
MOD Facilities
Motorway Service Stations
Nursing homes
Public houses
Large country estates
Villages, rural communities and housing associations
Zoos/theme parks/leisure attractions
Inside the HIPAF® Sewage Treatment Plant

Primary settlement tank
Settled solids at bottom
Unique air lift forward feed into biozone
Biological treatment unit (biozone)
Air diffusers at the bottom of each chamber
Filter media
Settled sludge air lift back to primary
Final (humus) settlement tank
The HIPAF® 3-Stage Treatment Process
Primary - Primary settlement is in accordance with BS6297, giving the required hydraulic retention time and ensuring that 30% of the BOD will settle out in the primary tank. HiPAF plants below 500 persons will have sludge storage integral to the primary tank. The primary settlement tank is equipped with baffles to prevent floating scum entering the biological phase of the treatment process. It also incorporates a unique forward feed system which lowers the level in the tank, during periods of low flow, to provide a buffering capacity for possible surges in the
Biological - After primary settlement, the settled liquor flows to the biological treatment unit by displacement and via the air lift forward feed. The biozone is fully segmented internally to eliminate the risk of process short cuts. Each biozone segment is filled with high voidage plastic filter media, where both carbonaceous and nitrifying processes take place, mitigating process risks associated with variable loads. Air to oxygenate the influent and to scour excess biomass from the filter media is introduced continuously below each chamber by a series of diffusers.
Final - Following biological treatment the effluent flows into the final (humus) settlement tank where the excess biomass settles out. The humus tank is equipped with air lifts which are arranged to automatically transfer settled humus sludge to the primary tank for co-settlement. The treated effluent flows under gravity to the works outfall.
HIPAF® Range
HiPAF® Compact Plant (single-tank) 1-60 Persons
Compact below-ground GRP package plant containing primary settlement, biological treatment and final settlement modules

HiPAF® Midi Plant (single-tank) 60-250 Persons
Below ground GRP package plant containing primary settlement, biological treatment and final settlement modules

HiPAF® Modular Plant (multi-tank) 250-3000 Persons
Below ground GRP package plant containing individual primary settlement,  biological treatment and final settlement modules

HiPAF® Transportable and Temporary SAF Plant
Ideal for temporary use (e.g. construction sites) or where existing plant is failing. The HiPAF-2-GO incorporates primary settlement, biological treatment and final settlement all contained within an easy to transport steel container.

The right solution for you
To discuss your requirements and arrange a no-cost survey please contact Watling Hope on 01789 740757 or use our on-line enquiry form.