Screenings Processing and Handling

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The screening process removes objects such as rags, paper, plastics and any other solids that are found in wastewater. One of the significant costs incurred by wastewater treatment plants is the disposal of these solids. Selecting the correct combination and configuration of laundering, washing and compression equipment can reduce the amount of solids for disposal and reduce the overall operating costs considerably.

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Wash Press (Premium)
The Kuhn KWP-P (Premium) Wash Press is used to treat organic matter after the pre-separation of screenings. Screenings are transferred to the wash press where they are efficiently and effectively washed, dewatered and compacted.
Features

Features of the Kuhn KWP-P (Premium) Wash Press include:
- Multiple functions: washing, compression and dewatering, and transportation
- Wedge wire over the entire machine length provides an enlarged dewatering surface (particularly well-suited for launder charging)
- Washing potential up to 95%
- Dewatering up to 50% (depending on screenings)
- Unique wash system utilising a hollow core screw that promotes an exceptional degree of organic removal
- The position of the screw shaft can be adjusted from the outside
- Chromium coatings for wear protection
- An independent bearing system that is housed separately from the gearbox, protecting the longevity of the gearbox
- Removable inspection cover in the compression zone
- Powerful and robust design
- Easily removable drainage pan.
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Wash Press (Heavy Duty)
The Kuhn KWP-HD (Heavy Duty) Wash Press contains the many excellent features of the KWP-P (Premium). In addition, this high-quality, heavy-duty wash press is fitted with an extra stable and robust 3-D lasered separation screen. The screen’s enlarged open area makes it highly resistant to clogging. Both the separation screen and wear rails in the KWP-HD are replaceable. This wash press has a powerful, robust design and improved access for maintenance and cleaning.

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Whitetip Shark Washing Compactor
Hydro-Dyne’s Whitetip Shark Washing Compactors are robust, high performing and efficient. These compactors are available in different configurations, varying in type of flow, solids collected and washing processes. Standard model designs include:
- Whitetip Shark Washing Compactor — this compactor provides drainage, washing and compaction.
- Whitetip Shark Washing Compactor with enhanced dewatering — this compactor provides drainage, washing, rinse, dewatering and compaction.
- Whitetip Shark Washing Compactor with enhanced wash/dewatering — this compactor provides drainage, washing, enhanced washing, rinse, dewatering and compaction.
Features

Features of these compactors include:
- Designed to process screenings from any screen, launder/sluice or conveyor to any waste disposal drop point
- Weight reduction up to 80%
- Screening volume reduction to up to 85%
- Organic removal up to 95%
- Dewatered screenings dry solids content up to 40%
- Screenings meet USEPA 9095 landfill requirements
- T304 or T316 stainless steel fabrication
- Heavy duty AR400 auger for long wear life and ability to crush large objects
- Standard screw diameters.
For more information about each of the models download the brochure by clicking the link below.
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Macipump/Macerator Pump
The Haigh Engineering Company’s Macipumps have been designed to disintegrate sewage waste within a liquid medium. Process solids, together with wash water, enter a stationary cutter ring within which a tipped impeller with radial slots rotates. The combined action of the cutter ring and impeller shred the solids putting them in suspension for further processing.
Features

The Macipump mechanism shears the solids as they flow through the holes in the shearplate to a controlled particle size. Features include:
- Highly effective proven cutting action gives controlled particle size
- Strong agitation, provides homogeneous solids in suspension
- Cutters can be changed within minutes with perfect alignment
- No special tools required
- Enables flexibility in location of liquid separation and compaction phase.
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Lisep Liquid Separator and Lipactor Screenings Compactor
The Haigh Engineering Company’s high performance and reliable Lisep Liquid Separator and Lipactor Screenings Compactor produces washed, clean and compacted screenings, with maximum organics returned to the flow to improve downstream processes. The superior volume reduction the Lisep Liquid Separator and Lipactor Screenings Compactor produces results in reduced site traffic and skip transportation.

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ACE Pactor
The Haigh Engineering Company’s ACE Pactor has been designed to process screenings from any inlet screen and can handle up to 8 L/s of launder wash water. Control is via ultrasonic level transducer ensuring that the ACE Pactor only runs when there is adequate screening material present resulting in lower maintenance and whole life costs.

The ACE Pactor is a simple, economical solution for compacting screenings and creating clean, dry, low volume screenings product.
Features

Features include:
- Compliant with WIMES 6.03
- Large drainage deck
- Up to 8 L/s of launder wash water
- Zero wash water screw compactor
- Heavy duty auger with Hardox flights
- Heavy duty bearing assembly
- Hard wearing brush assembly
- Hardox shearing plate
- Robust stainless steel fabrication
- Low whole life costs
- All maintenance can be carried out in situ
- Minimal onsite requirements.
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Spiral Conveyor/Sluicing Launder
Kuhn KSF Spiral Conveyors are used for transporting solid matter and sludge, especially sludge which tends to be tacky and sticky — such as siftings and screenings from wastewater treatment plants.

Kuhn KLS Sluicing Launders are used for transporting screenings slurry via gravity from the discharge of a screen to screenings processing equipment. The Kuhn KLS Sluicing Launder utilises the same trough as the Kuhn KSF Spiral Conveyor.

All Kuhn spiral conveyors and sluicing launders can be designed as completely closed systems thereby avoiding dust, moisture and odour emissions. Their high-quality, wear-resistant materials ensure a long service life. The construction is modular in nature to ensure maximum flexibility and customisation.
Features

The Kuhn KSF Spiral Conveyor includes the following features:
- Hygienic protection measures
- Modular design
- Conveyor lengths of up to 20 metres without intermediate bearings are possible
- High inclination angle
- Wide inclination angle
- Robust high-quality materials
- Low maintenance requirements due to wear-resistant construction
- Replaceable wear liners.
Additional functions can be integrated along the conveying path (cooling, heating, washing, etc.)

The Kuhn KLS Sluicing Launder’s modular design offers flexibility and can be customised to include the following features:
- Hygienic protection measures
- Hinged and easily removed top covers
- Extended lengths
- Variable inclination level
- Fixed or adjustable height legs
- Robust high-quality materials used
- Low maintenance requirements due gravity transport
- Splitter boxes to allow selection of numerous screenings processing units
- Overflow weirs and level sensors
- Interconnecting dual launders allowing for additional flow and redundancy
- Grit removal stone traps.
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Screw Conveyor/Sluice Systems
Hydro-Dyne’s Spinner Shark Screw Conveyor and Sluice Systems provide a variety of choices for transporting solids. Both systems and are totally enclosed to ensure safety, odour control and provide aesthetics.
Features

Hydro-Dyne’s Spinner Shark Screw Conveyor is a simple and effective means of dewatering and transporting solids. It is available with hydraulic and electric drives, and single or double bearings. This conveyor comprises a stainless steel flight and has UHMWPE wear surfaces to reduce friction and repair. This conveyor is available in two models:
- Shafted flight model with the ability to add compaction, and with precision lasered, wedge wire or perforated plate dewatering zones
- Shaftless flight model with increased throughput and the ability to convey larger solids.
Hydro-Dyne’s Spinner Shark Sluice System is a simple and efficient method for transporting screenings. With no mechanical equipment this low-maintenance model:
- Is available in different configurations
- Has the option of manual or actuated sluice gates
- Has T304 or T316 stainless steel fabrication.
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Screenings Shredder
The Kuhn KRZ Screenings Shredder has been designed to be used in in conjunction with Kuhn wash presses. The screenings shredder can be flange-connected directly to the wash press discharge chute. A shaftless screw with multiple flights then shreds the previously washed, dewatered and compressed screenings.

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