Dredging
Nexco Trading supplies specialty polymers and treatment chemicals to support dredging operations across municipal, industrial, and infrastructure projects. Our solutions are applied in waterways, ports, harbors, rivers, canals, and municipal or industrial lagoons where efficient management of dredged sediments is critical.
By leveraging a broad portfolio of water-soluble polymers sourced from proven global manufacturers, Nexco Trading helps dredging contractors and project owners improve solids–liquids separation, reduce sediment volumes, and accelerate project timelines. Our technical support team works with clients to develop practical, site-specific treatment programs suitable for both short-term and long-duration dredging projects.
APPLICATION OVERVIEW
Municipal and industrial dredging
Waterway and channel maintenance
Port and harbor construction
Lagoon and pond clean-out
Contaminated sediment management
SETTLING AND THICKENING
Polymer treatment plays a critical role in accelerating the settling and thickening of fine dredged sediments. Nexco Trading supplies polymers that enhance floc formation, allowing faster clarification of supernatant water and improved solids capture.
Typical settling and thickening applications include:
Hopper dredges: Enhanced settling of fine particles to improve overflow water clarity prior to discharge
Pre-settlement ponds or lagoons: Improved sediment capture reduces required land area, shortens residence time, and enables faster reuse or discharge of clarified water
By improving sediment consolidation, polymer-assisted settling significantly reduces the footprint and duration of sediment management operations.
DEWATERING OF DREDGED SEDIMENTS
Nexco Trading supplies polymers specifically selected to improve dewatering performance of dredged or pre-thickened sediments. Polymer conditioning produces friable, stackable cake solids suitable for reuse, reclamation, or disposal.
Common dewatering methods supported include:
Geotextile tubes
Belt filter presses
Plate and frame filter presses
Centrifuges
Our chemical solutions help increase solids capture, reduce filtrate turbidity, and minimize overall disposal volumes.
PORT AND WATERWAY CONSTRUCTION PROJECTS
In port construction and large-scale waterway dredging projects, untreated sediments often require extensive land area and long drying periods when managed through conventional settling alone. Nexco Trading supports alternative treatment approaches by applying polymers prior to settling or thickening within containment ponds or lagoons.
This approach promotes formation of uniform, stable flocs of sand and fine particles, enabling faster consolidation and dewatering. As a result, land requirements are reduced, containment areas can be reused more quickly, and overall project costs are lowered compared to traditional sediment handling methods.
CONTAMINATED SEDIMENTS
For dredging projects involving contaminated sediments, Nexco Trading’s polymer solutions enhance dewatering efficiency while improving discharge water quality. Reduced sediment volumes lower transportation and disposal costs and support compliance with environmental and regulatory requirements for hazardous or restricted waste handling.
SERVICES FOR DREDGING PROJECTS
Nexco Trading provides end-to-end support for dredging applications, including:
Review of project objectives and site conditions
Selection and supply of appropriate polymers
Guidance on polymer preparation and dosing systems
Field start-up assistance and performance optimization
Ongoing technical support throughout the project lifecycle