Belgium: Damen Delivers Customised DOP Pumps for Antwerp Super Project

Damen Dredging Equipment has delivered 2 customised DOP submersible dredge pumps plus their ladders to SeReAnt for the Antwerp harbour clean up project. The enormous construction project is running smoothly, and the DOP pumps are mounted on trolleys over the settling tanks. The use of a standard DOP pump in a customised execution is another sound example of the relevance of the Damen standard concept.

The AMORAS project in the Antwerp harbour is an enormous construction project including all phases required from removing in situ harbour sludge to final storage of dry filter blocks. One phase is the storage of silt, which is to consolidate to its near in situ density. This storage is done in 4 wedge-shaped settling tanks of 120.000 m3 each. Over these storage tanks runs a fixed 173 m long 24 m high bay, to which 2 controllable trolleys are connected. Attached to each trolley is the Damen ladder with integrated DOP submersible dredge pump.

The standard 150 kW hydraulically driven dredge pump, type DOP2320, has an average production per hour of 1.000 m3 each. The working angle of the DOP pumps, which are identical and interchangeable, can be adjusted by means of a hydraulic cylinder. Depending on the amount of silt stored, it works at a maximum dredging depth of -6 m. The ladder-based DOP pump is fitted out with a hydraulically driven auger head to maximise the mixture concentration. The ladder integrates the DOP pumps discharge piping, plus its hydraulic piping and signal cables. The customer has chosen the DOP pump because of its compactness and as it has proven itself to be a reliable part of the long production line.

Damen Dredging Equipment is proud that their another of her customised standard dredging tools an indispensable element in the permanent and innovative solution of SeReAnt to the treatment and storage of dredged sediments of the Port of Antwerp.

About Damen Dredging Equipment

Damen Dredging Equipment is a specialised supplier of dredging equipment and dredging instrumentation & automation. The company, based in Nijkerk, the Netherlands, has over 60 years of experience in the construction of dredging equipment serving the worldwide dredging industry. The dredging tools made are all built to specific customer requirements, making use of a wide range of standard equipment. The company is fully owned by the Damen Shipyards Group. More information can be found on

About SeReAnt

SeReAnt is a joint venture company in which 2 major contractors, Dredging International and Jan de Nul, have combined the forces of their respective specialised environmental subsidiaries DEME Environmental Contractors and Envisan. SeReAnt will design and build the silt treatment and storage system, followed by the exploitation of the project for the next 15 years. More information can be found on and


In order to guarantee sufficient draught to shipping traffic in the Port of Antwerp for the coming decades, the Flemish Government and the Port of Antwerp have launched one of the largest silt dredging and treatment projects of the world. The project, called AMORAS, covers the entire process from dredging to responsible storage of the contaminated material of which high volumes have to be dredged and stored annually. The process starts with one of the current dredgers of the Port of Antwerp depositing silt and sludge in a closed part of the harbour, the under water depot.

Here, the Damen cutter suction dredger is located to pump this sediment continuously to a shore-based plant where the sand is regained from the sludge. The silt is then pumped to settling tanks where it dewaters to decrease volume. Then, 2 Damen DOP pumps fitted out with auger heads pump the material to a plant where the fully dewatered silt is pressed to filter blocks. These dry filter blocks are stored on land for future use in for instance infrastructural works.


October 18, 2010