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Contaminated Dredgings Processing

Much of the contaminated dredging material collected today is pumped directly onto a land source, 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.

Our Solution

CDEnviro solutions can process and treat contaminated dredgings to avoid landfill costs and create products for re-use and for sale in the market.

The first important step is to dewater the dredgings to make it easier to process. Without dewatering, it is highly unlikely that this material would be accepted at any landfill site. 

The output products that can be reused or sold include sand and stone for use in the construction industry or landscaping and bedding.

The final clay content contains contaminants that are seperated from the output products and is further dewatered to ensure easy and cheap disposal at landfill.

Organics can also go to landfill, or on for further treatment. The recovered excess water typically goes through a tertiary treatment process and can be returned to the original water channel.

Further processing can remove heavy metal and hydrocarbon constituents from the waste water stream. This enables a wider range of more difficult, more lucrative waste streams to be processed.

Before and After Images

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