Rinsing and Suction System with Continuous Water Recycling

Environmentally Responsible Cleaning Technology

This rinsing and suction system is designed to deliver powerful, continuous cleaning performance while significantly reducing environmental impact. Through an advanced 8-stage water treatment and recycling process, wastewater is continuously cleaned, filtered, and reused during operation.

This closed-loop recycling system drastically reduces freshwater consumption, minimizes wastewater discharge, and eliminates unnecessary trips to refill freshwater tanks. The result is a more sustainable, cost-effective, and environmentally responsible cleaning solution for demanding industrial and municipal applications.

Its large operating capacity and ability to handle heavy sludge loads make the WRS 1 especially efficient in long-duration and high-intensity cleaning operations.

 

Key Environmental Benefits

• Continuous recycling and reuse of rinsing water
• Significant reduction in freshwater consumption
• Reduced wastewater disposal requirements
• Fewer transport movements for water refilling
• Lower fuel consumption and emissions
• Cleaner and more sustainable site operations
• Reduced operational downtime

 

Application Areas

• Hydrodynamic pipe cleaning
• Hydrodynamic sewer cleaning
• Continuous duct cleaning with integrated water recycling
• Surface cleaning
• Tank and container interior cleaning
• Industrial cleaning operations

 

Main Features

• Combined suction and high-pressure rinsing operation
• Continuous onboard water treatment system
• Variable water chamber configuration
• Free-flow emptying system
• Pressure emptying via vacuum pump
• Pneumatic discharge piston system
• Optional multi-chamber tank system

 

Tank and Container System

• Sludge compartment sized to customer requirements
• Tank air volume up to 20,000 litres
• Cylindrical sludge chamber design
• Manufactured in steel or stainless steel
• Fully opening rear closure door for efficient unloading
• Integrated water chamber options:
  • Internal tank construction
  • Cylindrical chamber configuration
  • Side-mounted water tanks
• Fill level monitoring via sight glass or float indicator with scale

 

Rear Closure Door

• Full cross-section opening for rapid discharge
• Dished construction for increased strength
• Available in steel or stainless steel
• Hydraulically operated upward opening
• Central locking system available in:
  • Pneumatic
  • Hydraulic
  • Manual operation

 

Vacuum Pump System

Available with leading vacuum pump manufacturers, including:

• CVS
• Gardner Denver Wittig
• SIHI
• Jurop
• Samson

 

Specifications

• Single or dual pump configuration
• Suction capacity up to 4,000 m³/h
• Mechanical or hydraulic PTO drive
• Optional separate engine drive

 

Optional Equipment

• Suction hose systems
• Telescopic booms
• Boom box systems
• Hose cassette systems

 

Vacuum System Options

• Suction hose cassette
• Injection hose reel
• Telescopic boom
• Suction hose with telescopic boom
• Swivel boom and suction head systems
• Simultaneous boom operation

 

High-Pressure Pump System

Available with premium high-pressure pump manufacturers, including:

• URACA
• Hammelmann
• WOMA
• KAMAT
• Pratissoli

 

Specifications

• Single or dual pump setup
• Water flow up to 600 litres per minute
• Operating pressure up to 400 bar
• Pneumatic pressure control valve
• Variable pressure and speed control
• PTO or independent engine drive

 

 

High-Pressure Hose System

• Large hydraulic hose reel with infinitely variable drive in both directions
• Fixed or swivel-mounted reel systems
• Optional telescopic boom mounting
• Hose sizes:
  • DN19
  • DN25
  • DN32
  • DN38
• Hose lengths up to 360 metres
• Optional custom lengths up to 500 metres

 

Auxiliary Hose Reel

• Hydraulic or manual operation
• Suitable for 40–120 m DN13 high-pressure hose

 

Advanced Water Treatment System

Continuous Water Recycling with Pneumatic Piston Technology

The KROLL Water Recycling System (WRS I) is an advanced water-sludge separation and recycling system designed for continuous suction and high-pressure jetting operations without dependence on an external freshwater supply.

By continuously treating and reusing water during operation, the WRS I significantly reduces freshwater consumption, minimizes wastewater disposal, lowers transport movements, and decreases fuel usage and emissions. This environmentally responsible process delivers substantial operational savings while supporting sustainable cleaning practices.

The system is capable of recycling up to 600 litres per minute, allowing uninterrupted operation even during demanding sewer, industrial, and hydrodynamic cleaning applications.

Integrated with a pneumatic piston system, the WRS I provides highly efficient sludge separation, maximized tank utilization, and reliable operation under heavy sludge conditions.

Environmental Advantages

• Continuous reuse of rinsing water
• Major reduction in freshwater consumption
• Reduced environmental discharge and wastewater handling
• Fewer refill journeys and lower fuel consumption
• Lower operating emissions
• Reduced downtime during operation
• Improved sustainability for municipal and industrial cleaning operations

 

8-Stage Water Recycling and Treatment Process

 

PHASE 1 — Primary Separation in the Sludge Chamber

Sand, sludge, debris, and wastewater are vacuumed into the sludge compartment located behind the pneumatically movable partition wall (piston).

At this stage, heavy solids and debris settle naturally at the bottom of the sludge chamber while muddy water remains above the sludge layer, initiating the primary separation process.

 

PHASE 2 — Coarse Filtration

The muddy water passes through a system of coarse-mesh filter walls integrated into the rear door ahead of the rotating filter drum compartment.

These filters retain larger debris and materials that are not permitted to pass through the filtration openings. The filter openings vary in size at different levels to optimize separation efficiency.

The pre-filtered muddy water then collects in the rotating filter drum compartment.

 

PHASE 3 — Precision Filter Drum Separation

A hydraulically driven stainless steel precision slit-drum filter separates smaller debris particles from the sludge water down to approximately 500–800 microns.

The rotating filter drum is continuously cleaned by:

• Mechanical scraper systems
• Periodically activated high-pressure spray bars using clean water
• Automatic internal back-flushing cycles

This self-cleaning process ensures consistent filtration performance and uninterrupted operation.

 

PHASE 4 — Cyclone Separation System

A hydraulically driven transfer pump delivers the pre-filtered water to two specially designed cyclone separators mounted sequentially on the upper sides of the tank.

The transfer pump operates at a constant hydraulic speed, ensuring maximum water flow and pressure regardless of engine speed fluctuations. This maintains optimum cyclone efficiency and prevents clogging.

 

PHASE 5 — Clean Water Chamber and Cascade Zone

The cyclone-treated water is transferred into the clean water chamber, which incorporates a specially designed calming and cascade zone.

This controlled flow design slows water movement and improves fine-particle separation before final clarification.

 

PHASE 6 — Final Sedimentation and Pure Water Chamber

Water flows gently over the cascade wall into the pure water chamber at low velocity, allowing the finest suspended solids to settle naturally.

To protect the high-pressure pump from particulate contamination, the suction inlet for the high-pressure pump is positioned approximately 500 mm above the tank floor.

 

PHASE 7 — Automatic Water Level Regulation

Within the pure water chamber, the recycled water level automatically fluctuates between minimum and maximum operating levels.

• When the maximum level is reached, the transfer pump switches off while water continues circulating through the cyclone system.
• When the water level falls to the minimum level, sensors automatically reactivate the transfer pump, restarting the recycling cycle through the filter drum and cyclone separators.

This automated regulation ensures continuous and efficient water management throughout operation.

 

PHASE 8 — Automatic Sludge Return and Reuse

Any debris or settled material accumulating in the lower regions of the settling and pure water chambers is automatically returned to the sludge tank.

The purified recycled water is then supplied directly to the high-pressure pump for continued jetting and cleaning operations.

This closed-loop recycling process enables fully continuous operation with minimal environmental impact and dramatically reduced freshwater demand.

 

Control System

• LOGO control system
• CAN-BUS control technology
• Pressure and speed management
• Remote-control operation
• Central stainless steel operating platform

 

Standard Equipment

• Aluminium or stainless steel discharge apron
• Side-mounted toolboxes and hose troughs
• Additional storage toolbox
• High-pressure sewer cleaning accessories
• Low-water warning system
• Residual water drainage system
• Bench vice
• Spray gun and spray lance
• Halogen work lights

 

Emptying Systems

Available discharge systems include:

• Pneumatic piston discharge
• Drag piston system
• Rear tipping system

Optional Equipment and Accessories

• Air compressor
• Hydraulic winch
• Rear-view camera system
• Meter counting system
• Heated storage compartment
• Fully enclosed body design
• Cold and hot-water hand wash system
• Advertising panels
• Odour neutralisation system
• Deep suction system
• Winter heating package
• Anti-aerosol protection system
• Nozzle sets
• Additional custom accessories available on request