Municipal Wastewater


Municipal wastewater screening to adapt to flow and debris conditions

Plant resiliency starts at the headworks – with screening made simple

Removing non-biological solids early in the wastewater treatment process translates into more efficient and reliable operation of downstream equipment. Thus, effective preliminary treatment is an important determinant of overall plant performance.

Duperon offers screening solutions and expertise to build wastewater plant resilience.

  • It begins with simple, reliable, and adaptive screening that handles the unique conditions of your plant, with minimal downtime or maintenance.
  • Removing the bulk of the solids allows the downstream treatment processes to operate as it should; problem-free, reducing operation and maintenance costs and ensuring process integrity.
  • Screening improves the efficiency of biological and chemical wastewater treatment processes to meet regulations, NPDES permits and maintain environmental compliance.
  • Washing and compacting cleans organic material from screenings allowing for more nutrients in the biological process and cleaner solids going to the landfill. Washer compactors also reduce disposal costs by reducing both volume and weight of screenings.
  • All of which allows your team and resources to focus on other treatment demands.

More than 35 years ago, Duperon set out to build a better screening system. We learned about the known challenges and predictable results of existing options. By applying innovation, Duperon led the market to a new standard of simple, low maintenance and adaptable equipment with the invention of the FlexRake®.



Innovation remains a design standard as we continue to creatively solve problems and invent new products for liquid/solids separation applications:

  • Headworks
  • Preliminary treatment
  • Septage receiving
  • Sludge screening
  • Combined Sewer Overflows (CSOs)
  • Prisons
  • Raw water intakes
  • Piped influent
  • Pump stations
  • Lift stations
  • Manholes
  • Membrane Bioreactor (MBR) prescreening
  • Algae screening (typically pre-disinfection)

Solutions to address the following

Every process has its unique challenges. Duperon engineers will work with you to achieve your specific process goals, while bringing decades of liquid/solids separation experience and know-how to the conversation in the following areas:

  • Fine screens
  • Coarse screens
  • Mechanical bar screens
  • Perforated screens
  • Drum screens
  • Flushable wipes removal
  • Washing compacting
  • Debris handling
  • Conveyance

The Duperon®


‘You’ll like working with us’ is a commitment and way we deliver extraordinary customer care for the full life-cycle of your equipment. This is how we strive to earn the privilege to serve your continued screening needs

Process resilience

Effective solids removal through a broad range of flow and debris conditions so downstream assets remain protected

Reliable operation

Duperon adaptive technologies handles grease, grit, first flushes, rags, large or unusual debris (like 2x4s, bricks or sewer plugs) without shutdown or operator intervention

Low cost of ownership

With few parts and minimal maintenance required, Duperon equipment is easy to install, own and operate

Ongoing Innovation

You can count on continuous development of products that are responsive, intelligent and meet the demands of your plant now and in the future

Municipal Wastewater
Solutions we provide

Coarse Screening

Bar openings greater than ½ in

Preliminary treatment screening. Pump protection.

Fine Screening

Openings ½ in down to 0.020 in

Solids removal before secondary or tertiary treatment.

Debris Management

Collection and Conveyance

Processing and transport of collected screenings.

You’ll like
working with us

Top notch in simplicity and reliability

Jim Kerezman
WWTP Superintendent, Goshen Wastewater Treatment Plant
Goshen, Indiana

Municipal Wastewater Treatment Products

By employing liquid/solids separation technology, inorganic materials can easily be removed at the headworks and effectively prevent costly downstream disruptions. Proper screening at the influent protects your processes, improves system sustainability and overall life-cycle costs. Solids handling equipment is also available for a fully automated system.

Duperon® Conveyance

Shaftless Screw Conveyor

Alternate to discharging onto the deck by application. Mechanical transportation and processing of captured debris.

Duperon® Dual Auger System

Dual Auger System

¾ in bar opening

Coarse, slotted 5 in 1 bar screen with vertical dual augers and discharge extension chute that captures, dewaters, compacts, transports and stores screenings. Ideal for flushable wipes. Connects to sewer inlets.

Duperon® FlexRake IQ®

FlexRake IQ

⅛ in – 4 in bar openings

In-channel fine or coarse, slotted bar screen with re-imagined FlexLink™ and Thru-Bar™ technology. Smart Raking™ enhancements and Smart LogIQ™ Sequence of Operations.

Duperon® FlexRake IQ2®

FlexRake IQ 2

¼ in – 4 in bar openings

In-channel fine or coarse, slotted bar screen with re-imagined FlexLink and Thru-Bar™ technology. Smart Raking™ enhancements, Smart Bar Screen®, and Smart LogIQ™ Sequence of Operations.

Duperon® FlexRake® FP

FlexRake FP

Bar openings greater than ½ in

In-channel coarse, slotted bar screen with FlexLink™ and UHMW Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.

Duperon® FlexRake® FPFS

FlexRake FPFS

¼ in – ½ in bar openings

Fine, slotted bar screen with FlexLink™ and SSTL Thru-Bar™ technology. Ideal for ‘sticky’ or matting debris. SSTL construction.

Duperon® FlexRake® FRHD

FlexRake FRHD

2 in – 4 in bar openings 

In-channel coarse, slotted bar screen with serrated UHMW scrapers and FlexLink™ Jam Evasion™ technology. SSTL construction used for wastewater.

Duperon® Internally Fed Drum Screen

Wedge wire, perforated plate, and wire mesh. Available in various opening sizes and as individual screen panels or single-screen wrap. The design eliminates trunnion wheels, sprockets, and chains, which reduces the wear and tear points and increases the product’s lifespan.

Products quick guide

Product Name Screen Type Bar Opening Bar Type Engineering
Dual Auger System Coarse ~¾  in Slotted Bar, SSTL Pre- Engineered
FlexRake® IQ™ Coarse & Fine ⅛ in to 4 in Slotted Bar, SSTL Site Specific
FlexRake® IQ2 Coarse & Fine ¼ in – 4 in Slotted Bar, SSTL Site Specific
FlexRake® Full Penetration Fine Screen Fine ¼ in to ½ in Slotted Bar, SSTL Site Specific
FlexRake® Full Penetration Coarse Greater than ½ in Slotted Bar, SSTL Site Specific
FlexRake® Heavy Duty Coarse 2 in – 4 in Slotted Bar, SSTL in wastewater Site Specific
FlexRake® Low Flow ¼ inch, ½ inch, ¾ inch, 1 inch Removable Bar, SSTL Pre- Engineered

Learn how four FlexRakes® endured back-to-back hurricanes, dealt with profound grit, improved worker safety & drastically reduced maintenance Read case study

How can we help

Tell us about your project

Do you have a liquid/solids separation challenge for a wastewater application? Let’s solve it together.


Design Collaboration

To build your solution, our engineers take the time to understand your facility, process, and goals.

We’ll combine our team’s experience with water screening, cleaning, and processing with your team’s detailed understanding of your product and process, so we can develop a reliable and cost-effective solution.