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Solids Separation with Screens and Fine Screens

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The first step of operationally reliable and efficient wastewater treatment

The separation of solids in wastewater with screens and fine screening systems is the first step in municipal and industrial wastewater treatment.

The main task here is to remove all coarse and foreign materials that could inhibit or hinder the function of subsequent wastewater treatment stages.

The following factors, among others, must be taken into account when planning an operationally reliable solids separation solution:

  • Maximum required hydraulic throughput
  • Expected screenings quantities
  • Required bar spacing or separation capacity for solids
  • Influence of sewer system (surges, deposits, pumping stations, etc.)
  • Redundancy requirements
  • Installation situation (channel, tank)
  • Feeding (by gravity, pump, hoist, ...)

All this information and framework conditions are then taken into account for the choice of the right machine technology and determine the number, size and type of screening systems.

Learn more
Parallel installation of three HUBER Multi-Rake Bar Screen RakeMax® at a municipal WWTP
Parallel installation of three HUBER Multi-Rake Bar Screen RakeMax® at a municipal wastewater treatment plant
HUBER Multi-Rake Bar Screen RakeMax® CF: Due to its vertical installation, the screen requires very little space - ideal for confined spaces, deep channels and pumping stations
HUBER Multi-Rake Bar Screen RakeMax® CF: Due to its vertical installation, the screen requires very little space - ideal for confined spaces, deep channels and pumping stations
HUBER Belt Screen EscaMax®
HUBER Belt Screen EscaMax® with excellent separation performance due to perforated plate screen elements.
HUBER Coarse Screen TrashMax®
HUBER Coarse Screen TrashMax®
For deep channels with high water levels for high flow rates
For deep channels with high water levels for high flow rates
Two HUBER Fine Screen STEP SCREEN® SSF units installed in parallel channels
Two HUBER Fine Screen STEP SCREEN® SSF units installed in parallel channels
HUBER Rotary Drum Fine Screen ROTAMAT® Ro2
HUBER Rotary Drum Fine Screen ROTAMAT® Ro2
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Machine Technology

A Wide Range of Screens, Fine Screens and Ultra-Fine Screens for any Application

HUBER has decades of experience in dimensioning and selecting the optimum machine technology for each individual mechanical cleaning application.

As different requirements also demand different screen systems, HUBER has developed a wide range of various screens, fine screens and ultra-fine screens , which are in use in thousands of installations worldwide.

The separated and removed screenings with household waste, faecal matter, toilet paper and mineral solids are then passed on to the screenings treatment system, which is ideally planned together with the screening plant.

Case Studies

HUBER Solutions in Operation

A Wastewater Case Study for Severn Trent Water at Melton Mowbray STW

The HUBER ROTAMAT® family – proven technology for large projects

Multi-Rake Bar Screen 2.0: the HUBER RakeMax® CF, an all-rounder with powerful hydraulics

Two new HUBER Rotary Drum Fine Screens ROTAMAT® Ro2 2600 XL for Salzburg-Siggerwiesen WWTP

A HUBER Technology Wastewater Case Study at Chippenham STW for Wessex Water

Up to 400 million litre capacity: HUBER successfully commissions 18 RakeMax® screens in the Madrid-Butarque stormwater retention basin

From screen building to sewage sludge drying: complete modernisation of the La Crosse wastewater treatment plant with HUBER

The HUBER Multi-Rake Bar Screen RakeMax® – a success story with more than 3000 installed machines

An award winning design wastewater case study at Westnewton WwTW

Wastewater Screening and Screenings Processing Solution Case Study at Kinmel Bay STW

HUBER Multi-Rake Bar Screen RakeMax® CF: An innovative screen system convinces in practice

A Wastewater Screening and Screenings Processing Case Study at WWTP Hull (Saltend)

HUBER Drum Screen LIQUID - innovative overall process succeeds in Norway

Busy - the mobile plants with HUBER Drum Screen LIQUID help in planning and operation

HUBER extends its range of coarse screen systems with the HUBER Grab Screen TrashLift

HUBER combines proven RakeMax® with center flow screen

HUBER Rotary Drum Fine Screen ROTAMAT® on cruise ship of MV WERFTEN

HUBER’s Perforated Plate Fine Screen Brings STAR Power to Star Water and Sewer District

HUBER supplies a process system as replacement for the primary settling tank

Charfield STW Case Study: Inlet Screen Replacement Project

When big ROTAMAT® Ro5 machines find their place

Refurbishment project: regional STP Linz-Asten

Reliable protection of membrane plants with HUBER Perforated Plate Screen ROTAMAT® STAR liquid

Improvement of the Maer Lane STW Inlet Works

Flawless operation and longevity make the RakeMax® Multiple Rake Screen invaluable to Guelph’s Screening Process

New product HUBER Drum Screen LIQUID: Increasing requirements need adapted solutions

Pulborough STW Inlet Screen Upgrade - A Wastewater Case Study

Major order: 12 HUBER Multi-Rake Bar Screens RakeMax® for Vienna

Meadowhead STW Wastewater Case Study

Milford Haven STW - A Wastewater Case Study

RakeMax® HF combines the advantages of the wellproven RakeMax® and a bar rack with a very small inclination!

HUBER supplies the equipment for a major sewage treatment works in Berlin

Huber Technology upgrades the Inlet works at Duncrue Street, Belfast - a Wastewater case Study

Excellent 84% separation results due to the consequent further development of the EscaMax® Belt Screen

Multifunctional Complete Plant installed on STP Ortenburg

Further development of the well-proven ROTAMAT® screen concept: new Pro line

Three HUBER RakeMax® screens for STW Magdeburg / Gerwisch

Further developed ROTAMAT® Rotary Drum Fine Screen with increased hydraulic capacity: ROTAMAT® Perforated Plate Screen RPPS-Star

Mechanical wastewater pre-treatment for membrane bioreactors

HUBER supplies the machines for the mechanical treatment stage of the worlds’ largest wastewater treatment plant project

HUBER RoDisc® Rotary Mesh Screen ready for the future

28 RoDisc® Rotary Mesh Screens to treat Asia Olympics wastewater

Great HUBER Bar Screens and Wash-Presses in Dublin

Perforated Band Screens EscaMax® for Anglian Water

Twelve 2.6 diameter Ro1 screens in China’s boom town

HUBER Belt Screen EscaMax® installation
A Wastewater Case Study for Severn Trent Water at Melton Mowbray STW

HUBER Technology are pleased to of recently completed the installation and commissioning at Melton Mowbray STW.

Fully assembled ROTAMAT® Ro2 with screen basket cover.
The HUBER ROTAMAT® family – proven technology for large projects

The HUBER ROTAMAT® family is the foundation on which HUBER SE started its development in wastewater technology. On this basis, the company has been able to grow and develop continuously. 

The HUBER Multi-Rake Bar Screen RakeMax® CF in Bartow, Florida
Multi-Rake Bar Screen 2.0: the HUBER RakeMax® CF, an all-rounder with powerful hydraulics

It's the next chapter in the success story of the HUBER Multi-Rake Bar Screen RakeMax®, which has been on the market for many years. In the North American market the all-rounder began with the sale of the first HUBER RakeMax® CF screen in 2020.

HUBER Rotary Drum Fine Screen ROTAMAT® Ro2 2600 XL
Two new HUBER Rotary Drum Fine Screens ROTAMAT® Ro2 2600 XL for Salzburg-Siggerwiesen WWTP

The Salzburg-Siggerwiesen wastewater treatment plant has received two new HUBER Rotary Drum Fine Screens ROTAMAT® Ro2 2600 XL with 3 mm gap width. These machines are the largest screens in southern Germany/Austria.

New HUBER EscaMax® Inlet Screens & WAP® L BG6 Screenings Handling Plants
A HUBER Technology Wastewater Case Study at Chippenham STW for Wessex Water

HUBER Technology recently completed a project for Wessex Water at our local treatment works Chippenham STW in Wiltshire.

HUBER has successfully commissioned 18 RakeMax® screens in the Spanish capital Madrid
Up to 400 million litre capacity: HUBER successfully commissions 18 RakeMax® screens in the Madrid-Butarque stormwater retention basin

It is a successful large-scale project at the gates of the Spanish capital: HUBER successfully commissions 18 HUBER Multi-Rake Bar Screen RakeMax® units in the Madrid-Butarque stormwater retention basin.

From screen building to sewage sludge drying: complete modernisation of the La Crosse wastewater treatment plant with HUBER

HUBER Technology Inc., the Denver, North Carolina-based subsidiary of HUBER SE, was awarded the contract for the modernisation of the La Crosse wastewater treatment plant located on Isle La Plume. The scope of supply includes a HUBER Multi-Rake Bar Screen RakeMax® CF in the screen building in the inlet to the WWTP, a HUBER Belt Dryer BT 18 for sewage sludge drying, and a HUBER Sludgecleaner STRAINPRESS® for primary sludge screening. The total investment volume of the modernisation package amounts to about 60 million US dollars.

The “anniversary machine” RakeMax® in its basic version in the main inlet of a wastewater treatment plant.
The HUBER Multi-Rake Bar Screen RakeMax® – a success story with more than 3000 installed machines

At HUBER SE, the 3,000th RakeMax® screen has left the factory at the company’s headquarters in Berching. In the course of its almost 20-year success story, the RakeMax® has become the flagship among screening systems.

HUBER Micro Strainer ROTAMAT® Ro9 at Westnewton WwTW
An award winning design wastewater case study at Westnewton WwTW

HUBER Technology supplied, installed and commissioned a duty/standby 3 mm 2D inlet screening package.

Wastewater Screening and Screenings Processing Solution at Kinmel Bay STW, Wales
Wastewater Screening and Screenings Processing Solution Case Study at Kinmel Bay STW

HUBER Technology recently supplied, installed and commissioned three HUBER Belt Screen EscaMax®, a 6 mm 2D perforated plate fine screen and two HUBER Screenings Wash Press WAP® L BG8’s to Kinmel Bay, a Dwr Cymru Welsh Water coastal site in North Wales.

HUBER Multi-Rake Bar Screen RakeMax® CF
HUBER Multi-Rake Bar Screen RakeMax® CF: An innovative screen system convinces in practice

According to the motto "two become one", the HUBER Multi-Rake Bar Screen RakeMax® CF combines optimally matched technologies in one machine.

HUBER Multi-Rake Bar Screens RakeMax®
A Wastewater Screening and Screenings Processing Case Study at WWTP Hull (Saltend)

HUBER Technology recently supplied, installed and commissioned coarse and fine inlet screens, launder systems and screenings handling plant for both sets of screens at one of Yorkshire Water’s largest wastewater treatment, Hull (Saltend). The new elevated inlet works that houses the HUBER equipment is designed to treat the flow to full treatment of 2140 l/s and a population equivalent approaching 450,000. In addition to the construction of a new inlet works, HUBER were successful in securing the subcontract to supply 2 No. Ro3 sludge screens as part of the upgrade of the sludge treatment facility.

Complete HUBER solution, installed and ready for operation
HUBER Drum Screen LIQUID - innovative overall process succeeds in Norway

In Øygarden, one of the most modern wastewater treatment plants in the country was built - with innovative and optimally matched HUBER technology.

Validation operation - a pump sump was retrofitted into an existing buffer tank with concrete shaft segments.
Busy - the mobile plants with HUBER Drum Screen LIQUID help in planning and operation

Our demonstration plants with the HUBER Drum Screen LIQUID for the reduction of the pollution load in the inlet to wastewater treatment plants are in great demand and fully booked until 2020.

HUBER extends its range of coarse screen systems with the HUBER Grab Screen TrashLift

Coarse screens are the protective equipment of a screening system. Their task is not removing the incoming screenings from the water flow, but coarse screens are used to protect downstream finer screening systems (or machine technology in general) in the event that massive amounts of coarse material or extreme-size debris occur.

The new HUBER Multi-Rake Bar Screen RakeMax® CF
HUBER combines proven RakeMax® with center flow screen

HUBER presents the HUBER Multi-Rake Bar Screen RakeMax® CF, an innovative variant of the well-proven RakeMax® system with a Centre Flow screen.

Cruise Ship
HUBER Rotary Drum Fine Screen ROTAMAT® on cruise ship of MV WERFTEN

Two HUBER Membrane Screen ROTAMAT® RoMem 780 units with 0,5 mm mesh size will be installed on a cruise ship of the Endeavor series to clean the wastewater from the cabins.

The HUBER unit prevents harmful screenings from reaching the plant’s membrane bioreactor
HUBER’s Perforated Plate Fine Screen Brings STAR Power to Star Water and Sewer District

Consultants and engineers pointed the district to HUBER and its ROTAMAT® STAR fine screen as a replacement that would take the plant into the future.

 

The installation of a HUBER CarbonWin® system with fine screening technology saves the costs for a biological treatment stage.
HUBER supplies a process system as replacement for the primary settling tank

In 2017, HUBER was successful with its innovative HUBER CarbonWin® system for carbon removal, winning projects in two federal states of Germany and now working busily on implementing the projects in Saxony-Anhalt and Baden-Württemberg.

HUBER Micro Strainer ROTAMAT® Ro9 installed at Charfield STW
Charfield STW Case Study: Inlet Screen Replacement Project

As part of the Wessex Water inlet screen replacement projects, HUBER Technology completed the delivery and installation of a new inlet screen and screenings handling project at Charfield STW near Wooton under Edge.

When big ROTAMAT® Ro5 machines find their place

Especially the installation of the huge HUBER Complete Plant ROTAMAT® Ro5 units is an important moment in the execution of the project.

Most advanced technology: HUBER machines on STP Linz-Asten, the largest sewage treatment plant in Upper Austria
Refurbishment project: regional STP Linz-Asten

On the largest sewage treatment plant in Upper Austria with a design size of 950,000 PE, the coarse screens were replaced and the screenings treatment system was refurbished.

Several HUBER ROTAMAT® screens installed directly in the channel of the STP
Reliable protection of membrane plants with HUBER Perforated Plate Screen ROTAMAT® STAR liquid

HUBER fine screening plants can look back on a very long tradition in the USA. Constant further development, offers our customers tailor-made solutions, such as for Morgantown STP.

New RakeMax® screen installed on top of the existing balance tank
Improvement of the Maer Lane STW Inlet Works

HUBER Technology recently completed and commissioned a large project for South West Water to improve the inlet works facility at the above site which treats the sewage from the town of Exmouth in Devon.

"Nothing slips by the RakeMax®."
Flawless operation and longevity make the RakeMax® Multiple Rake Screen invaluable to Guelph’s Screening Process

“Nothing slips by the RakeMax®. Its operation is absolutely flawless. After three years, we look at the components in amazement because they are ageless – it’s as if they were just installed yesterday.”

Design sketch of HUBER Drum Screen LIQUID
New product HUBER Drum Screen LIQUID: Increasing requirements need adapted solutions

The new HUBER Drum Screen LIQUID is a machine that is available in different designs and suitable for numerous applications of solids-liquid separation. Depending on the specific application requirements the horizontal drum is covered with a mesh, wedge wire or perforated plate.

Inlet screen upgrade at Pulborough STW
Pulborough STW Inlet Screen Upgrade - A Wastewater Case Study

Huber Technology UK completed the inlet screen upgrade at Pulborough STW, installing two HUBER Micro Strainer ROTAMAT® Ro9 / 700’s on an elevated inlet works.

HUBER Multi-Rake Bar Screen RakeMax® unit at Vienna STW with 8 mm bar spacing
Major order: 12 HUBER Multi-Rake Bar Screens RakeMax® for Vienna

Extensive modernisation of the Vienna wastewater screening plant: six HUBER Multi-Rake Bar Screen RakeMax® units with 8 mm and 3 mm bar spacing, six HUBER Wash Press WAP® 8 HD units and screenings conveying system.

Inlet works at Meadowhead STW
Meadowhead STW Wastewater Case Study

HUBER Technology UK has completed the upgrade of the inlet works at Meadowhead STW. The project involved the installation of 4-off HUBER RakeMax® Multi-Rake Bar Screen 6300/2752/19 Coarse Screens and 2-off 12 m³/hr HUBER WAP-L Wash Press Screening Handling units for the Coarse Screens and 2-off 15 m³/hr WAP-L Wash Press Screening Handling units for the retrofitting into the existing inlet works for handling screenings from the Fine Screens.

Huber Technology recently completed the installation of new escalator inlet screens and screenings handling plant
Milford Haven STW - A Wastewater Case Study

Huber Technology recently completed the installation of new escalator inlet screens and screenings handling plant for Welsh Water (DCWW) at Milford Haven STW.

Due to the extremely flat installation of the bar rack the screen section through which the flow passes is always double the water level in the channel.
RakeMax® HF combines the advantages of the wellproven RakeMax® and a bar rack with a very small inclination!

On the basis of the successful RakeMax®, another new screen for headworks has been developed in the course of continuous further development: the L-shaped RakeMax HF® (high flow).

Line 1 shortly after start-up
HUBER supplies the equipment for a major sewage treatment works in Berlin

The wastewater in Germany’s capital Berlin is cleaned by a total of 6 large sewage treatment plants. One of them received a complete re-equipment of the machine technology in the screen building from HUBER SE.

Huber Technology upgrades the Inlet works at Duncrue Street, Belfast - a Wastewater case Study

Huber Technology successfully completed a large £1.2 million project at Duncrue Street, Belfast. The project consisted of supply of equipment and mechanical installation to the inlet works.

The basis for our EscaMax® success: convincing functionality, consequent further development, and high manufacturing quality
Excellent 84% separation results due to the consequent further development of the EscaMax® Belt Screen

The HUBER Belt Screen EscaMax® is a system that especially offers our customers excellent separation results.

The plant in Ortenburg
Multifunctional Complete Plant installed on STP Ortenburg

The new sewage treatment works at the city of Ortenburg is designed for 11,000 PE and provides state-of-the-art wastewater treatment.

HUBER ROTAMAT® Membrane Screen RoMem Pro 1600 installed on STP Bitterfeld-Wolfen
Further development of the well-proven ROTAMAT® screen concept: new Pro line

The municipal wastewater of the Bitterfeld-Wolfen sewage treatment plant is prescreened in our ROTAMAT® Membrane Screen RoMem Pro 1600 to protect the heat exchangers.

Three HUBER RakeMax® screens on WWTP Magdeburg/Gerwisch
Three HUBER RakeMax® screens for STW Magdeburg / Gerwisch

When the sewage treatment works in Magdeburg was planned 15 years ago for the installation of three fine screens, additional space was already planned.

Star-shaped screen drum of the ROTAMAT® Perforated Plate Screen RPPS-Star
Further developed ROTAMAT® Rotary Drum Fine Screen with increased hydraulic capacity: ROTAMAT® Perforated Plate Screen RPPS-Star

On the basis of the worldwide known and well-proven system of HUBER ROTAMAT® fine screens with wedge wire screen basket we developed the ultra-fine ROTAMAT® Perforated Plate Screen RPPS with perforated plate. The two-dimensional screen (perforated plate) ensures the reliable removal of hairs and fibres.

Coarse and ultra-fine screening at the plant in Glessen / Germany
Mechanical wastewater pre-treatment for membrane bioreactors

When membrane technology solutions appeared on the market for the treatment of municipal wastewater, the requirements on mechanical wastewater treatment systems changed fundamentally.

WWTP Atotonilco is built on an area of 1.580.000 m³
HUBER supplies the machines for the mechanical treatment stage of the worlds’ largest wastewater treatment plant project

The largest sewage treatment plant under construction in the world lies in the Mexican Tula Valley of Hidalgo. HUBER SE will supply the complete equipment for the mechanical pre-treatment stage and in this way contribute significantly to the future improvement of the country’s water shortage problems.

HUBER Rotary Mesh Screen RoDisc®
HUBER RoDisc® Rotary Mesh Screen ready for the future

With the HUBER Rotary Mesh Screen RoDisc® we have risen to the challenge of increased requirements on future wastewater treatment. New technical developments combined with innovative manufacturing technology ensure the HUBER RoDisc® Rotary Mesh Screen is ahead of future requirements in wastewater treatment.

5 RoDisc® 24 screens in the factory just before delivery with the clearly visible discs consisting of individual plastic segments
28 RoDisc® Rotary Mesh Screens to treat Asia Olympics wastewater

HUBER SE received the order for the supply of 28 RoDisc® Rotary Mesh Screens for the largest WWTP in the city Lie De. The screens will treat the daily produced wastewater of in total more than 2.15 million inhabitants from a connected area of 150 square kilometres.

Great HUBER Bar Screens and Wash-Presses in Dublin

HUBER Technology UK was chosen as supplier of seven bar screens and seven screenings wash-presses for the Dublin Bay Inlet Works at Ringsend.

Sleaford, UK: Perforated band screens EscaMax® 4000
Perforated Band Screens EscaMax® for Anglian Water

The operators are delighted with the new equipment and we are using this site as an excellent reference for the HUBER EscaMax®. 

Twelve 2.6 diameter Ro1 screens in China’s boom town

A total of twelve HUBER Fine Screens ROTAMAT® Ro1/2600 were supplied for the second construction phase of WWTP Zhuyu

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FAQ

Frequently Asked Questions

The size of the opening width on the one hand and the shape of the screening element on the other.

With one-dimensional screening elements such as bars, the separation efficiency is generally lower than with two-dimensional elements such as perforated plates, mesh, etc. This is mainly due to the fact that it is very difficult for long-fibre material such as hair to pass through a perforated plate.

This requirement can only be met by a screen that covers the full range of screen opening widths from fine to coarse screens.

In addition, the screen bars must be designed with the respective geometry to meet the corresponding requirement.

A typical screen that fulfills all these requirements is our HUBER Multi-Rake Bar Screen RakeMax®

Machines with a steep installation angle are best suited for such applications.

This screen installation option allows the installation space to be very compact, especially in the direction of flow.

Typical examples are our HUBER Multi-Rake Bar Screens RakeMax® and RakeMax® CF as well as the HUBER Belt Screen EscaMax®, HUBER Coarse Screen TrashMax® and HUBER Grab Screen TrashLift.

News

Related News

22-03-rakemax-3000-01
22/03/2022

The HUBER Multi-Rake Bar Screen RakeMax® – a success story with more than 3000 installed machines

At HUBER SE, the 3,000th RakeMax® screen has left the factory at the company’s headquarters in Berching. In the course of its almost 20-year success story, the RakeMax® has become the flagship among screening systems.

The HUBER Multi-Rake Bar Screen RakeMax®, firmly established in the market and first presented to the public at the International Trade Fair for Sewage Technology IFAT 2005, has meanwhile proven itself more than three thousand times on the worldwide market of wastewater technology due to its versatile application possibilities.

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