Hydroflux Pty Ltd

- Rotary Below Ground Screen

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In industrial applications, screening is essential as the first stage of treatment to remove bulk solids that would otherwise increase the solids and organic load on downstream plant. Hydroflux Industrial can supply many different forms of screenings systems using various types of media and aperture size with each screen being selected based on the application, the solids load, type of solids and the hydraulic profile.

The development, selection and supply of screens is maintained in-house utilising one of a range of products from Hydroflux HUBER or Hydroflux Technology. In industrial applications, in-channel screens are often a cost effective option if the hydraulic profile permits, otherwise above ground rotary type screens are the alternative solution. Hydroflux Industrial can also offer screenings compaction and dewatering systems to reduce the volume of waste to be disposed of.

There are numerous advantages to the Ro9 and RPPS range of above/below ground screens:
  • Screening prior to pumping, increasing life of pumps and reducing solids accumulation in pump wells.
  • Screening prior to balance tank with no need for costly elevated screen platforms.
  • Suitable for channel depths of up to 5 metres.
  • Automatic operation via level control.
  • Low headloss to avoid upstream issues in manholes and sumps.
  • Integrated conveying and compaction of screenings.

There are numerous applications for Screens:
  • Meat and poultry industry
  • Dairies
  • Beverage sector
  • Fruit and vegetable processing
  • Potato and potato chips
  • Vegetable oil processing
  • General Food industry
  • Manufacturing, metal processing
  • Industrial laundries
  • Paper, cardboard and printing
  • Potable water treatment

The wastewater flows into the open end of the inclined screen basket and then through the screen. Floating and suspended materials are retained by the bars of the screen basket.
Blinding of the screen surface generates an additional filtering effect so that solids can be retained that are smaller than the bar spacing.

At a certain difference in the water levels up and downstream of the screen, which is caused by screen surface blinding, the rake arm situated on the axle centre starts to rotate. Its tines, extending completely through the screen bars, cleans the basket, removes all the screenings, and conveys them into the centrally positioned trough with integrated screw conveyor.

As the screenings are conveyed and compressed within the inclined pipe, they are dewatered and compacted without any odour prior to being discharged into the customers container or a subsequent conveying unit.

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