B2. Installation and small scale test drive


The objective of this acitivity is to install and test the system on site, in the bay of Malmfjärden.

The dredging system is designed to be automated and therefore this activity will be used to better understand the system and bring adjustments and calibration to use it in full scale. As a result of the lessons learnt an adjusted plan for the full scale drive of the project will be produced. This will include a final decision of the outlets of the treated sediments. This action is divided into three main phases.


The objective of sub-action B2.1 is to install the dredging system at the test location in Kalmar. This installation will consist of submerging the system down into the dredging area and install the wire system that controls the dredging units. This phase also includes the installation of the treatment system.

Testing of equipment

The objective of sub-action B2.2 is to test the system that includes both the dredging units and the treatment plant. Initially, all sub-systems will be tested individually to ensure their function. When ready, the sub-systems will be connected together and a test drive will be performed using the complete system. Several parameters need to be tested and optimized such as inflow, retention time, inlet and outlet quality and others.

This also includes operational aspects of dredging units such as the buoyancy of the underwater equipment and the towing speed of the control raft. This is to give a better understanding and final adjustments/optimizations before the full scale dredging starts.

Without testing it in a small scale and understanding the main parameters to be controlled, the full-scale process can be much more difficult, with higher costs and lower effectiveness.

Testing of extracting metals and/or phosphorus

The objective of sub-action B2.3 is to test and develop methods in laboratory scale for metals and phosphorus recovery from sediments. The idea is that these methods in the future can be scaled up and tested in pilot. The potential methods, to be investigated by Linnaeus University, for metals recovery are: physico-chemical methods (electricity-based processes) , biologically mediated extractive approaches (e.g. bioleaching) and hybrid technologies (Electrochemical simulation combined with bioleaching, Hydrometallurgy). Each method will have advantages and constraints and it will be of crucial importance to test a combination of either two or more technologies (hybrid technologies) in order to compensate the disadvantages inherent to each technology and maximize efficiency and recovery rates.

More pages within actions

A1. Planning and preparation

Project management and project partners need to plan and prepare for the stages in the project.

B1. Construction

Dredging equipment will be constructed to suit the project purpose and objectives.

B3. Large scale demonstration

Based on the knowledge of the small scale test, we will perform full scale dredging and treatment.

C1. Monitoring and evaluation

The focus for monitoring and evaluation is mainly to follow up the effects of the dredging activities.

D1. Dissemination

How to disseminate the technology and results of Life SURE.

Last updated: 12 January 2021
Published: 30 November 2018