TenCate Geosynthetics Netherlands bv

Geotube Dewatering Technology Provides Expertise in the Clean-Up of Contaminated Sediments - Case Study


Courtesy of TenCate Geosynthetics Netherlands bv

Geotube units offer an effective solution for contaminated sites to manage the recovery and containment of PCBs, heavy metals, BTEX, PAHs, PACs, and other hazardous materials.

Contaminated sediments are a common problem for communities and industries around the world. Past spills, leaks, discharges, and improper disposal or management of hazardous materials and wastes often result in contaminated land and water. Geotube dewatering technology has proven successful in the cleanup of municipal and industrial byproducts.

TenCate, manufacturer of Geotube materials, develops and produces materials that function to increase performance, reduce cost, and deliver measurable results by working with our customers to provide advanced solutions.

The Issue of Contaminants

From PCBsto PAHs, to arsenic and heavy metals, contaminants invade our soil and waterways. Sediments can enter through municipal storm water systems. Various industries discharge hazardous materials and wastewater into rivers, creeks, and ponds. These areas often have collected contaminated sediments from industrial runoff for decades. Such contaminated marine sediments pose significant environmental hazards that impact fish, wildlife, people, and communities.

Not only does the contaminated sediment need to be removed, it must be done in such a way as not to inflict further damage on the environment. Geotube units offer a safe, economical cleanup method for the following contaminants:

  • PCBs
  • BTEX
  • PAHs
  • PACs
  • Lead
  • Copper
  • Zinc
  • Arsenic
  • Creosote
  • Chromium
  • Beryllium
  • Cadmium
  • Mercury
  • Selenium
  • Thallium
  • and more

Environmental & Marine Remediation

Environmental remediation projects are typically expensive, complex, and fraught with containment and disposal challenges. Geotube dewatering technology addresses these inherent issues with custom-designed plans for each clean-up and recovery project The technology is simple and effective to implement And this process is much more cost-effective than belt presses or other dewatering methods.

Geotube dewatering technology works well with various removal methods: pumping, excavation, hydraulic dredging, and mechanical dredging. Whether dealing with excavated contaminated soil or sediment deposits dredged from a river or harbor, the Geotube process effectively dewaters and contains the sediment and hazardous materials in a single operation. This drastically reduces the material volume and saves thousands of dollars in disposal costs by consolidating higher solids in a manageable form with limited maintenance.

A key component to the Geotube dewatering system is the proper use of polymers and chemical conditioners. They're used to promote flocculation and improve solids retention and filtrate quality. When polymers are added to the slurry mix, it increases the coagulation of sediment particles. 'This allows us to optimize the slurry material flow,' explained Glenn Lundin, TenCate Market Manager. 'It greatly improves the efficiency of the dewatering and containment of the contaminants.'

Total Solution

TenCate provides complete assistance from job planning to waste disposal. 'Our experienced team of managers and installers understand the complexities of hazardous material containment,' said Mark Gunzenhauser, Vice President Sales -Geosystems. 'We know how to safely manage the clean-up of PCBs and heavy metals — from sizing and design, to staging and operations. We are committed to improving our waterways and the environment.'

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