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Dredged Material Dewatering

The Problem

Much of the material collected from dredging is pumped directly onto a land source or back into the water, which only defers the problem rather than solving it. This material, if even accepted at landfill, would be very expensive to dispose of, due to its composition and weight.

Dredged material also often contains contaminants that need to be removed before the material can be pumped back out to sea.

 

Our Solution

CDEnviro provide equipment solutions for both contaminated and non-contaminated dredged material.

The first important step in the process is dredging dewatering. Our sophisticated screening system dewaters non-contaminated dredged material and removes particles down to 400 mesh (35 micron). This results in 90% of water being removed from silt and grit so the need for solidifying with Portland[RA1]  cement or sawdust is eliminated and disposal costs are kept to a minimum.

The CDEnviro equipment solution removes any contaminants found in sediment and therefore clean sand and stone can be generated for re-use and pumping costs become a thing of the past.

A turnkey solution will be required for full decontamination of dredged material. This includes a range of scrubbing, washing, dewatering and purification equipment. Our system can be combined with tertiary water treatment to allow customers to discharge treated water back into the bay. The salinity of the discharged water is in balance with water in the harbor, except it's much cleaner.

Our solutions can be commissioned on a barge reducing the need for jetties and eliminating the costs associated with them.

A bespoke solution can be provided to suit each company's needs.

 

The Result

Maximum dewatering and recycling of the material on-site reduces pumping and transport costs to confined disposal facilities, reducing the overall carbon footprint to the environment.

Through the use of the CDEnviro processing system the need for additional drying agents is eliminated. Sediment is dewatered in-situ and costs are kept to a minimum. This also ensures any waste going to landfill is now drier and easier to manage.

90% of water and sand is recovered from the recycling solution and the output products generated can be reused or sold for revenue gain in various applications such as top soil, pipe bedding and backfill.

Whatever your business case for processing dredging materials, we have a solution for you.

Before and After Images

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