Thermal design
Site characterization defines electrode spacing, energy balance, vapor capture, target temperatures, and monitoring.
Electrical Resistance Heating for complex source zones
Thermal remediation for safer environmental decisions
Doxor applies ERH to contaminated soil and groundwater where schedule, access, safety, and regulatory closure matter.
15+years applying ERH in Brazil
23full-scale ERH projects completed
3active thermal projects
30 mdocumented full-depth heating
Technology
Heat the source zone. Control the risk. Compress the cleanup schedule.
Electrical Resistance Heating uses current between electrodes to heat the subsurface matrix. Doxor integrates energy delivery, vapor recovery, safety, and sampling around each site's conditions.
- Active industrial facilities with operating production lines
- Parking garages, residential buildings, and dense urban sites
- Sensitive properties such as schools and occupied public areas
- Deep heterogeneous plumes with chlorinated solvents or petroleum impacts
Controlled ERH heating
Current between electrodes heats soil and groundwater, increasing contaminant volatility and recovery.
Vapor and water management
Vapors and fluids are extracted, treated, and monitored with electrical, structural, and air controls.
Performance closure
Temperature, energy, mass removal, and environmental data guide optimization until cleanup goals are met.
Field experience
A Brazilian ERH portfolio built in real operating conditions.
Industrial, residential, public, and redevelopment projects across heterogeneous soils, shallow and deep groundwater, and demanding stakeholder environments.
Field results
Evidence from occupied, sensitive, and technically difficult sites.
Urban school
Thermal remediation at a sensitive school property
680 m² treatment area39 electrodes151 operating days
Benzene targets were reached in less than 110 days, 765 kg of VOCs were removed, and energy use finished 17% below estimate.
Read case studyActive industrial site
ERH with subsidence controls at an industrial facility
900 m² treatment area53 electrodes90–120 day window
After structural investigation, reinforcement, and monitoring, operations restarted and soil and groundwater goals were achieved.
Read case studyDeep CVOC plume
Full-depth ERH heating for chlorinated solvents
149 electrodes6 heating phasesUp to 31 m per electrode
Full-depth heating reached the 100 °C target, with peak readings of 138.9 °C and reductions above 99% in several wells.
Read case studyTechnical basis
Designed for regulators, consultants, owners, and communities.
Doxor's experience is documented through project records, technical summaries, and conference work on performance, safety, electrode design, and treatability testing.
INMETRO ISO 17025
Battelle · I2T2 · RemTech · AESAS
VOC · CVOC · BTEX · TPH
Projects across multiple Brazilian states