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 is single-built in a closed steel module inside which are three chambers for aeration, settling and discharge-disinfection. Because everything is in one unit, this facilitates transport and installation. Every chamber has been provided with the necessary access and inspection registers. Modular construction allows for increased processing capacity by placing more units 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 the pipes that re-circulate sludge and grease towards the aeration chamber are located in the settling chamber. The settling is pressurized in this chamber, facilitating the deposition of solids. All the instruments and control elements of the plant are housed inside a vandalism-resistent cabinet. The connection between the instruments inside the cabinet and the plant is through pipes or conduit.

Facet’s STP Series Sewage Treatment Plants meet the spillage requirements of 91/271/CE regulation. The sound level is lower than 55 dB(A) at 3 metres from the limit of the parcel where it is located. These Plants do not generate sludge nor do they produce odors due to the en closed 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 3 m from the parcel limit.
• No sludge generation.
• No odor generation.
• Automatic operation driven by PLC.
• Inside protection: 250 micron epoxy paint.
• Outer protection: 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 an air relief valve.
• Automatic sludge recirculation system.
• Access and inspection registers in every chamber.
• Anti-vandal control cabinet internally covered with sound insulating material and with the same
   outer finish as the Plant. It includes a self-supporting soleplate and hoisting eyes, for their direct
   installation in the open air.
• IP-55 electric control panel, including operation synoptic panel.

• Vessel: S-275-JR Carbon Steel • Cabinet and soleplate: S-275-JR Carbon Steel • Air Diffusers: AISI-304 Stainless Steel • Air diffuser pipe (within the aeration chamber): AISI- 304 Stainless Steel • Ozonization Circuit Piping: AISI-304 Stainless Steel (optional).

• Inlet: DIN 2576 PN10 • Outlet: DIN 2576 PN10 • Venting: DIN 2576 PN10 • Overflow: DIN 2576 PN10 • Sampling: 1/2” NPT

• Elevating grinding-pumping group, with level start up/stop automatic control,    and high vacuum protection with vacuostat. • Flow rate electromagnetic meter. • Flow totalizer. • Disinfection circuit by ozonization, composed by a pump, recirculation pipes and    an air refrigerated ozone generator. • Transmission of information about the Plant status via GSM modem.