Soil remediation session 4 of Remtech Europe 2019

Session 4 is chaired by Frank Swartjes and Natalia Rodriguez Eugenio is about the Soil Remediation case studies and tecnologies. Here you find some rumors about it.

1st speech is about an international project in Lebanon about contamination of PCB that will be presented by Lucia Mastacchini and Marcello Iocca (Waste and Chemicals). First part of the project was about on-field controls and the application of a check list (equipment type, the estimated installation date, equipment conditions leaks). A list of alternatives for the treatment of the most critical areas including an estimation of costs for collections of equipment and their treatment in compliance with international BAT and the remediation of polluted areas was proposed. The execution will be defined in a specific international tender.

2nd speech is a case study of soil remediation presented by Michela De Camillis, Rogier De Waele, Marijke Van Camp, and Martin Slooijer (GreenSoil). The remediation consists of excavation and 100% on-site landfarming for soil (completed) and biosparging for groundwater (ongoing). During the project, innovative techniques like Biopile Air Filtration Technique (BAFT), and Regenerative Bioscrubber (RBS) were successfully developed to reduce costs, especially related to activated carbon consumption. Both the ‘BAFT process’ and ‘RBS’ reached removal efficiencies between 60-90% in treating highly loaded soil vapors (up to 2000 ppm xylene) originating from other active landfarm depots.

Source: https://www.greensoilgroup.com/en/project/westerlo-full-scale-btex-soil-and-groundwater-remediation/1

3rd speech by Katia Pacella, Jan Haemers (Haemers) and Sadjad Mohammadian would address the problem of mixture of contaminants (organic and heavy metals) that often are a problem that could be solved with a technology train: a combination of two innovative techniques: In Situ thermal desorption (ISTD) and In Situ stabilization (ColFerroX). The innovative ISTD system developed by Haemers consists of heating the soil by conduction: hot air produced by Smart BurnersTM circulate through stainless steel tubes that are placed into the contaminated volume. This thermal technique volatilizes the pollutant by heating the soil to a target temperature. Once in vapor phase, the pollutant is extracted and treated by a Soil Vapor Extraction. ColFerroX Technology is focusing on removal of heavy metal contaminants, originally from groundwater, using iron oxide nanoparticles. These particles are colloidal and remain stable in aqueous suspension, therefore they can be easily delivered into the porous matrix of soil and aquifers in desired concentrations.

Source: https://haemers-technologies.com/smartburners/

4th speech is presented by Joseph F Guarnaccia (BASF) and Michael Ayers (WatershedGEO). It is a landfill closure case study using novel capping system, called the ClosureTurf system. The system is essentially a surface cap which replaces the soil cover layer with an engineered synthetic turf that provides ballast and generates a turbulent boundary layer, both attributes to prevent uplift, moderates liner expansion and contraction due to temperature changes, and protects the liner from weathering. The system installation cost is on par with ‘traditional’ cover systems, and it requires de minimis maintenance compared to a vegetative cap, thus providing a cost-effective application.

Source: https://watershedgeo.com/closureturf/

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