J+A Washpactor-Jet™ System

Screened solids must be washed prior to compaction in order to prevent bacteria and other contaminants from fouling dewatered waste products. The J+A Washpactor-Jet™ system is an improved raw sewage screening and compaction system that can handle capacities up to 24m3/hr. The screenings are discharged into a U-shaped, perforated sieve-like trough that drains the liquids out as the solids are moved through the machine via an Archimedean screw.
  • The Jones+Attwood Washpactor-Jetsystem is available in three models (200, 300 and 500) capable of treating screenings up to 12.0 cubic meters per hour depending on model selection. A duplex unit with an increased capacity up to 24.0 cubic meters per hour is available, although increased screw speeds and corresponding motor powers are necessary.
  • This unit can sit directly beneath the screen discharge and process screened solids immediately.
  • Liquids drained from the unit are either channeled into the works drainage system or back into the incoming flow of effluent.
  • Screenings can be delivered by conventional conveyor systems or washed launder method.
  • Archimedean screws available in a variety of materials to suit any application
  • Capacities range up to 24.0m³/hour
  • Exclusive steady-bearing is mounted to the discharge and compaction end of the screw
  • Robust screw mechanism operates in a perforated-plate trough
  • Various outlet chute styles and arrangements to accommodate the majority of collection methods
  • High quality stainless steel construction
  • High capacity mechanical / electrical drive system with ample overload capacity
  • Rotatable steady bearing increases the life of the Washpactor-Jet
  • High-rated drive end thrust and radial bearing
  • Reduces screened solids volume for easy disposal
  • Designed to accept water-borne solids from screening systems
  • Internal machine wash system with automatic on / off flow control
  • Drop box and bagging units available

As the collected screenings enter the Jones+Attwood Washpactor-Jet they are deposited into a U-shaped, perforated trough that acts as a sieve to drain off excess water. The wastewater removed by the compacting process and from the initial dewatering is returned to the trough collection tank and discharged to a local drain or screening channel.

The solids are conveyed to the compaction / washing sections via an Archimedean screw. Brushes are installed on the outer edge of the screw flights, which are in contact with the base of the trough to ensure that the drainage holes are wiped clean of grease and organic material during operation.

The washing action of the compactor is housed within the steady bearing sleeve. Washwater is fed to the sleeve from 4 to 6 locations via a main washwater manifold. The compacting and dewatering begins within the compacting-cone area. The washed screenings are forced by the mechanical action of the screw through the tapered cone section where the screenings are compacted and dewatered, and then the screenings are forced past the cone into an outlet chute, which provides the back pressure required for the satisfactory dewatering of the material.

A range of outlet chute arrangements are available to suit most collection methods. These are generally comprised of parallel or tapered chutes of various lengths and are capable of incorporating a single cassette bagging unit.

What is the advantage of the Washpactor-Jet over a screw compactor?

In addition to compacting and dewatering screenings, the Washpactor-Jet also utilizes a washing system to reduce fecal content.

What should the washwater quality be?

Pre-screened to 1mm or better, with a minimum pressure of 2 bar.

Can you offer a stainless steel screw?

We can offer the screw in several different materials, including stainless steel, but we recommend mild steel due to its superior wearing qualities.

What kind of screenings transfer systems can be accepted by the Washpactor-Jet?

The Washpactor-Jet will accept screenings from either a water-borne launder system or screw conveyors.

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