Soil Remediation Process
Nelson Environmental Remediation uses a Direct Fired Thermal Desorption process that eliminates toxic organics from contaminated soil. This entire process is done on site and allows NELSON to provide – “Clean Dirt, No Doubt!”
The TDU process eliminates client liabilities associated with transportation of contaminated material to landfill or other off site locations and sourcing and transportation of clean backfill. Thermally desorbed soils result in a positive social outcome of beneficial re-use availability and reducing the possibility of contaminated material sitting in landfills. The result is recycled soil with enhanced community partnerships for our stakeholders.
NELSON has worked hard to deliver a service where we can guarantee success, and retain the trust of our clients — past and present. We’ve delivered on our slogan of “Clean Dirt No Doubt!”, for more than 22 years offering soil remediation services using our mobile, on-site Thermal Desorption technology.
Oxidizer
The dust free volatilized contaminant gas stream leaves the baghouse and enters the thermal oxidizer where they are oxidized into CO2 and water, with a destruction removal efficiency (DRE) capable of 99.99% depending on the contaminant concentrations.
Clean Offgas
The remediation process results in clean offgas. As constituents are oxidized, there are no toxic compounds released into the atmosphere.
Baghouse
The volatilized vapours pass through a baghouse filtration system. Dust particulates are removed from the soil within the bag house, allowing cleaned vaporized contaminants to enter the Oxidizer
Excavate
The contaminated soil is excavated through the use of heavy machinery and piled on site for preparation and homogenization.
Material Handling
Materials to be processed are prepared by screening or running through an Allu bucket to ensure homogeneous particle size, prior to loading into a feed hopper and then directed to a conveyor which operates at a controlled rate.
Desorber
The prepared soil are fed into the thermal desorber drum. In the drum, an evaporative process volatilizes the organic contaminants in the soil into a vapour phase (gases) which in turn, separates them from the solid material. The process is not a form of incineration and is defined by the (EPA) as “a physical separation process”. The volatilized vapours pass through a baghouse filtration system then into a thermal oxidizer and are oxidized into CO2 and water. The soil is heated in a rotating drum, separating the associated hydrocarbons via desorption, according to the concentration of contaminant in the soil and other factors.
Clean Soil
The desorbed soil is then discharged in a quench drum, where it is cooled and re-hydrated. The remediation process is complete and the treated soil is ready for beneficial re-use.
Oversized Debris
The oversized debris is sorted and removed from the process.The oxidizer oxidizes the desorbed contaminant gas stream from the baghouse, converting them to Carbon Dioxide and Water. The destruction removal efficiency (DRE) is capable of up to 99.999% depending on the contaminate concentrations.