Noggerath® Band Screen Centre-Flo™

Noggerath® Band Screen Centre-Flo™

Technological solutions inspired by nature


Noggerath® Band Screen Centre-Flo™ is an exceptional quality coarse and fine screening screens that addresses a wide range of wastewater treatment challenges, including the treatment of municipal freshwater, seawater, municipal wastewater and industrial wastewater, and the protection of downstream treatment processes. They use state-of-the-art technological solutions to ensure:

  • Improved hydraulic performance due to higher flow capacity.
  • More efficient collection of drowned materials due to the extremely large open screening area.
  • Efficient handling of high gravel and sand loads.
  • Long service life without the need for increased maintenance.
  • Savings in construction costs and space due to retrofitting and customisation options.

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Description

Noggerath® Band Screen Centre-Flo™ the New Generation of fine screening

Noggerath® Band Screen Centre-Flo™ is an innovative wastewater treatment unit for municipal and industrial wastewater treatment.  It is definitely the perfect solution for those who want to achieve efficient wastewater treatment and comprehensive environmental protection. In addition to providing long-term reliable performance, the grate offers the following advantages:

      1. Innovative chainless drive system.

The Noggerath® Band Screen Centre-Flo™ features a revolutionary chain-free drive mechanism. This drive system consists of a shaft and a pinion, mounted on the outer, clean side of the grille bar and features:

  • no accumulation of dirt and grime on the drive elements and a completely free discharge area inside the grill bar.
  • the actuator connections are made of oil-impregnated PE, which not only ensures resistance to wear and tear but also a long service life.
  • no need to change circuits, ensuring non-stop operation and reducing maintenance costs.

      2. Large open filtration area.

The innovative design of the belt grate, where the surface of the belt is parallel to the direction of flow and the effluent reverses direction 90 degrees in both directions and partially downwards after passing through the grate gates and hitting the back wall, offers many advantages:

  • the open filtering area increases by up to 90%, which significantly reduces flow losses and at the same time increases the hydraulic capacity.
  • The clean side of the screen is strictly separated from the dirty side, which prevents drowned solids from entering the clean side of the water, ensuring cleaning efficiency.
  • more efficient collection of sieved materials with lower construction costs, as a smaller channel is sufficient to pass the flow.

      3. Increased throughput and maximum retention.

Inspired by nature, Aqseptence group engineers have developed the innovative honeycomb structure sieve Honeycomb Hex Hi-Flow. “The Honeycomb filter plate is very stable and offers many advantages:

  • the surface open area is increased by up to 90%, maximising space utilisation and flow capacity.
  • less material is needed to produce the mesh, as the hexagonal perimeter is up to 10% smaller than other perimeters of the same area, which reduces the use of resources for production, thus contributing to the preservation of nature.
  • minimum drowning materials, maximum retention, guaranteeing high treatment efficiency and protection of downstream treatment plants (e.g. membrane bioreactors).

      4. Flexibility and easy adaptability.

The modular design of the belt grate allows the height and width of the belt grate to be optimised to meet the requirements of the channel, the capacity and the pressure loss, thus offering many advantages:

  • they can be designed to be easily adapted to existing infrastructures and retrofit projects to improve plant hydraulics and screening efficiency.
  • when designing new infrastructures, channel widths can be reduced, saving construction costs.
  • the system can be easily equipped with washing and compacting screw presses. Which saves floor space and allows efficient further washing of organic material and recycling of sieved material.

      5. Easy maintenance and installation.

The belt grate is a particularly robust and safe unit made of high quality materials. They have a unique, sophisticated design that offers many advantages:

  • easy to install, as the base plate assembly is bolted to the floor of the duct and the deflector plates seal the unit to the duct walls.
  • no abrasion-sensitive circuitry and the drive mechanism is mounted on the outside of the bar, making them resistant to aggressive sewage environments and reducing maintenance costs.
  • the unique honeycomb screen panels are easy to replace in segments, while the dual flushing system and inspection hatches on all sides facilitate maintenance and upgrades.

How it works

After entering through the barrier gate and hitting the back wall, the waste water reverses direction by 90 degrees and flows in both directions and partly downwards. The solids accumulate on the surface of the bar, forming an additional filter. When the level of the accumulating water rises to the specified working level, the belt starts to move and works until the normal working water level is reached. Accumulated sieved materials are lifted by the cellular filter plates and larger solids are lifted by rakes to the discharge point. At the upper turning point, the sifted materials are washed out by a double spray system located on the outside of the belt into an exhaust duct located near the top of the unit. The screen washing cycle is carried out over the entire width of the belt to improve treatment processes and reduce disposal costs.

As an additional option, a washing and compacting press may be used. The separated solids are then captured by a screw in the feeding zone and transported to the washing/compaction zone. In the compaction zone, the waste is washed/compacted, further dewatered and pressed through a friction pipe into the disposal unit.

Specification

Model designation by width and depth.. e.g.CF 450-600

Belt depth (panel length)

300 450 600 750 900 1050 1200 1500 1800 2100
Gate width 300 x x x
450 x x x x x
600 x x x x x x
750 x x x x x x
900 x x x x x x
1050 x x x x x x
1200 x x x x x x

 

Flow rates from 200 l/s to 3000 l/s   (can be higher depending on channel dimensions and downstream level)

Opening / opening

  • Gap/hole width 1-6 mm
  • Hexagonal panel (honeycomb) hole opening 2-10 mm

Open plate area

  • 64 % polyurethane for perforated panel (with multiple heads)
  • 92 % stainless steel Hex Hi-Flow filter plate (“Bee comb”)
Components Materials
Sieve plates Polypropylene PP

Ultra-high molecular weight polyethylene (UHMWPE) or stainless steel AISI 304 or 316L

Guide chains Ultra-high molecular weight polyethylene (UHMWPE)
Lifts Moulded PVC
Gaskets EPDM rubber
Fasteners, frame, etc. Stainless steel AISI 304 or 316L (others on request )

 

The technical data provided in this presentation are indicative only and must be determined on a case-by-case basis. Subject to technical changes.

Application and areas of activity

  • Seawater and municipal freshwater
  • Conventional wastewater treatment processes
  • Fine screening / fine sieving before membrane bioreactors (MBR plant)
  • Industrial wastewater systems

 

Additional options

Choice of belt

  • Reinforced tape. Stiffer tape for larger installations and/or installations with high level differential (more than 0,5 m)
  • Standard tape . Unreinforced tape for smaller installations and low differential (less than 0,5 m) installations
  • Polyurethane tape 10 ± 0,25 mm thick, cut to size and drilled using a multi-head drill
  • Stainless steel Honeycomb Hex Hi-Flow tape 0,2 mm wall, 10 ±0,05 mm thick, made to specification

Choice of emergency bypass

  • Integrated emergency overfill opening on the rear panel (Figure 1)
  • Integrated emergency overflow sluice gate.

Option for removal of sieved drowning materials

  • “The Noggerath® Centre-Flo™ CF belt grate can be supplied with an integrated debris washing press.
  • The belt grate can be supplied with an integrated dewatering and compacting screw press.
  • Centre-Flo™ can be combined with a wide range of solids handling equipment.