Soil Remediation
![Soil Remediation](/content/images_en/business/soil_p_01.jpg)
Flow Diagram of Soil Investigation (Detail)
![Flow Diagram of Soil Investigation](/content/images_en/business/soil_p_02.gif)
PHASE 1
Investigation
- Buying and selling of the land
- Environmental due diligence
PHASE 2
Investigation
- Buying and selling of the land
- Environmental due diligence
![Investigation](/content/images_en/business/soil_p_03.jpg)
Electromagnetic Survey
- Measuring of soil conductivity
- Sludge conductivity is lower than natural soil conductivity
- Estimating distribution of sludge
![Electromagnetic Survey](/content/images_en/business/soil_p_04.jpg)
PHASE 3
Research and development of Remediation Methodology
Remediation planning and management
Technology | Effect | Contaminant |
---|---|---|
Thermal Decomposition | Decompose | VOCs, Oil, Pesticides |
Thermal Desorption | Remove | VOCs, Hg |
Soil Washing | Remove | Heavy metals, Oil |
Chemical Decomposition | Decompose | VOCs, Oil |
Bioremediation | Decompose | VOCs, Oil |
Soil Washing removes heavy metals from contaminated soil
![Soil Washing removes heavy metals from contaminated soil](/content/images_en/business/soil_p_05.jpg)
Zero Valent Iron decomposes chlorinated VOCs in soil and groundwater
VOCs are decomposed within a few months after mixture of iron powder.
PRB (Permeable Reactive Barrier) with zero valent iron granular decomposes VOCs in groundwater.
![Zero Valent Iron decomposes chlorinated VOCs in soil and groundwater](/content/images_en/business/soil_p_06.jpg)
Oxidation (Chemical Decomposition)
Oxidative agent (such as hydrogen peroxide) or micro babble with ozone is injected or mixed into contaminated soil and groundwater.
![Oxidation (Chemical Decomposition)](/content/images_en/business/soil_p_07.jpg)
Aerobic Bioremediation
Aerobic bioremediation is applied to oil contamination. Land farming method is effective on a large scale site.
It takes a few months to complete a batch of remediation.
![Aerobic Bioremediation](/content/images_en/business/soil_p_08.jpg)
Anaerobic Bioremediation
Anaerobic bioremediation is applied to relatively low concentration groundwater contamination by injecting bio-activating reagent.
![Anaerobic Bioremediation](/content/images_en/business/soil_p_09.jpg)
Pump & Treat for Groundwater
Pump & treat is used at contamination source area or site boundary to prevent migration of contaminated groundwater.
![Pump & Treat for Groundwater](/content/images_en/business/soil_p_10.jpg)
Framework
![Framework](/content/images_en/business/soil_p_11.jpg)
Thailand, Indonesia, Singapore
Work is managed by resident engineers and Japanese experts.
Other countries
Work is managed by Japanese experts.
Achievements
We have investigated and remediated in over 80 countries.
![Achievements](/content/images_en/business/soil_p_12.jpg)