Facet International is the world leader in jet fuel handling, industrial coalescer separators, bilge water separator and other separation technology. Advanced filtration and separation products and systems for aviation, marine, petrochemical, water tretment, power genreation and general industrial markets.

Facet’s STP Series Sewage Treatment Plants for inland applications have been designed for gravity or pumping treatment of domestic sewage, and they're intended for surface installation.. These plants carry out the sewage treatment by biological means. STP units are of the "active sludge aerobic and extended aeration type," and they don't require dosing or other additives.

The Plant consist of a single-built prefabricated steel module (settling and disinfection chamber) outside an aboveground concrete pit (aeration chamber) built “in situ”. This configuration has been developed to allow transport inside a standard 40’ container and facilitate installation. This modular construction allows the increase of the processing capacity by placing more plants in parallel.

The air diffusers responsible for the oxygenation and agitation of the water to be treated, are placed within the aeration chamber. The biological filter and pipes that recirculate sludge and grease towards the aeration chamber, are located, also, in the prefabricated steel module. The settling is pressurized in the settling chamber facilitating the deposition of solids.

All the instruments and control elements of the plant are located on a prefabricated steel frame inside a concrete room built “in situ” close to the concrete pit. The connections between the instruments inside the room and the prefabricated steel module are through the pipes of the corresponding section.

Facet’s STP-HA Series Sewage Treatment Plants meet the spillage requirements of 91/271/CE regulation. The sound level is lower than 55 dB(A) at 6 meters from the room where the instruments are located. These Plants do not generate sludge nor do they produce odors due to the enclosed modular construction. The Plants are supplied fully pre-assembled and tested, so that they can be installed in their final location in one day.

• Meet the performance requirements of 91/271/CE regulation.
• Sound Level <55 dB(A) at 6 m from the room limit.
• No sludge generation.
• No odor generation.
• Automatic operation driven by PLC.
• Inside protection of prefabricated steel module: 250 micron epoxy paint.
• Outside protection of prefabricated steel module: 3 layers of 250
  micron paint and RAL 6016 finish.
• Aeration system composed by a blower, an air supply pipe, bubble diffusers, a filter and air relief valves.
• Automatic sludge recirculation system.
• Access and inspection registers.
• Equipment rests on a self supporting soleplate, and hoisting eyes are supplied for their direct
   installation inside the concrete room.   
• Soleplate protection: 3 layers of 250 micron paint and RAL 6016 finish.
• IP-55 electric control panel, including operation synoptic panel.

•Prefabricated steel module: S-275-JR Carbon Steel • Soleplate: S-275-JR Carbon Steel • Air Diffusers: AISI-304 Stainless Steel • Air diffuser pipe (within the aeration chamber): AISI- 304 Stainless Steel

• Two (2) Elevating grinding-pumping group (one operation, one stand-by) submersible type    with level start up/stop automatic control. Inside a built "in situ" prefabricated pumping well. • Flow rate electromagnetic meter. • Flow totalizer. • Disinfection circuit by ozonization, composed by a pump, recirculation pipes    and an air refrigerated ozone generator.