Built on a Rolba MediumCombi with Masko Zoll technology.

The product is based on well-proven technology. The vehicle can be used both as a sludge dewatering and MediumCombi. When used as a MediumCombi for conventional suction, the two sludge tanks hold 12,000 liters each.

Benefits of dewatering sludge in a three-chamber tank

In traditional emptying, the organisms responsible for biological activity accompany the sludge to the disposal site, and the activity ceases in the three-chamber tank. When using the MazkoZoll technology, the living organisms are returned to the three-chamber tank via the reject water.

But it’s not just benefits for the owner of the tank. Transporting water is expensive, and water itself has become a cost for many today. Draining directly at the triple-chamber well and refilling with the well’s own water saves both weight and volume while providing numerous environmental benefits. A typical sludge unit has a capacity of 4–5 triple-chamber wells per disposal session. Rolba Masko Zoll Dewatering units, the capacity increases to approximately 35 wells before disposal is necessary. So, transportation costs can be significantly reduced compared to conventional sludge suction.

Description of the dewatering principle

The tank is emptied in the same way as during a regular sludge emptying, and the sludge ends up in the front sludge compartment (dewatering compartment). At the same time as suction, water mixed with polymer is dosed. This causes the sludge to coagulate into a firmer form in the dewatering compartment.

From the dewatering compartment, the sludge is pumped further to the MaskoZoll unit where the sludge is then separated from the water. The sludge reaches 15–20% dry matter content through this process and transfers from the unit to the vehicle’s transport compartment (rear sludge compartment).

The reject water returns back into the well. This provides a capacity to empty approximately 35 tanks before disposal. The time required per tank varies depending on the amount of sludge in the tank.

Feel free to contact us, and we’ll tell you about additional benefits for both you, the customer, and the environment!

Equipment options

– Tank in stainless steel.
– Volume: 13,500 liters in three compartments, 7,000 liters in the rear sludge compartment, 5,000 liters in the front sludge compartment, and 1,500 liters in the water compartment.
– Tipping function and opening rear hatch.

Vacuum pump:
– Hydraulically driven, Lob pump type.
– Capacity: 22,000 l/min.
– Separator designed to achieve optimal efficiency and prevent oversuction.
– The system is adapted to minimize vacuum losses.

High-pressure jetting:
– Type: Pratissoli piston pump, hydraulically driven.
Mounted in stainless steel cabinet.
Capacity: 122 liters per minute, 150 bars with a ½” hose, 60 meters placed in the machinery cabinet.

Suction hose reel:
– Swivel suction hose reel with storage for up to 70 meters of 3″ suction hose on the rear door.

Other standard equipment:
– Åkerströms radio.
– Long hose box on the left side on top of a storage cabinet made of stainless steel with rubber sealing and lockable doors.

– The system is adapted to minimize vacuum losses.
– Adjustable high-pressure jetting on the radio.