DOWAエコシステム List of Products and Services

The DOWA Ecosystem is a business company of DOWA Holdings that expands the engineering capabilities cultivated in mining and smelting into environmental and recycling businesses. With three core businesses: recycling, waste treatment, and soil purification, we also engage in consulting that organically connects these areas, as well as a green technology business to respond to a low-carbon society, actively working on a wide range of environmental initiatives as a comprehensive environmental company. We are committed to actively contributing to environmental improvement, promoting the 3Rs, and addressing global warming not only within Japan but also in our business areas overseas. 【Business Activities】 ■ Metal Recycling ■ Resource and Energy Recycling ■ Waste Neutralization and Management ■ Soil and Groundwater Contamination Measures ■ Environmental Consulting, etc. For more details, please refer to our catalog or feel free to contact us.

• Other services
• Hazardous material processing
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Organic chlorine compounds such as trichloroethylene (TCE) are decomposed and purified using iron powder for soil remediation, which has been uniquely developed and improved by the DOWA Ecosystem Group.

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DOWA Ecosystem's soil purification business conducts a comprehensive process from investigation to purification treatment and monitoring. We assess all conditions comprehensively to select the optimal treatment methods such as soil washing, chemical/thermal decomposition, and biodegradation. We respond broadly not only to heavy metals but also to VOCs (volatile organic compounds), oil contamination, as well as buried waste and complex pollution. DOWA Ecosystem has evolved various professional technologies developed from mining and refining techniques into soil purification technologies, providing solutions at the highest domestic level. ■ Exploration technology ■ Water treatment and groundwater purification technology ■ Research and technology development ■ Concentration technology Through various organic collaborations within the DOWA Group, we are developing comprehensive environmental businesses, achieving true recycling. ■ Soil purification plant: 50,000 tons/month ■ Thermal treatment plant: 78,000 tons/month ■ Managed final disposal site: 4,700,000 m³ ■ For other functions and details, please download the catalog or contact us.

• Hazardous material processing
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DOWA Ecosystem's soil purification business conducts a comprehensive process from investigation to purification treatment and monitoring. We assess all conditions comprehensively to select the optimal treatment methods such as soil washing, chemical/thermal decomposition, and biodegradation. We address a wide range of issues, including not only heavy metals but also VOCs (volatile organic compounds), oil contamination, buried waste, and complex pollution. ■ Soil and groundwater contamination investigation - Abundant track record - With over 20 years of experience and know-how, we conduct efficient, accurate, and detailed investigations and consulting. - Since we can handle everything from investigation to purification consistently, we provide reliable and reassuring support. ■ Decomposition using iron powder for soil purification - Iron powder for soil purification developed and improved uniquely by the DOWA Ecosystem Group. - Efficient construction DIM (Direct Iron Mixing) possible up to 60m with a three-axis auger. - Pre-treatment allows for the purification of "complex contamination with oil and VOCs." ■ Metal recycling from contaminated soil - Recycling lead from soil containing lead bullets at shooting ranges. - Various treatment technologies (pumping treatment, biodegradation, chemical oxidation decomposition). ■ For more details, please download the catalog or contact us.

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The DOWA Ecosystem Group's waste management operates under a comprehensive system that handles everything from collection and transportation to intermediate and final processing within its own group. Through proper management that ensures complete traceability of this waste, we completely avoid risks associated with illegal dumping and improper processing. We take full responsibility from start to finish, ensuring that processing is carried out reliably and sincerely. We are confident in this. ■ Treatment of waste containing "mercury" We have obtained processing permits for mercury-containing waste at two factories, which is difficult to acquire. ■ Complete harmless treatment of fluorocarbons At our three facilities—Ecosystem Sanyo, Ecosystem Akita, and Ecosystem Chiba—we have obtained permits for fluorocarbon destruction and conduct thermal decomposition treatment of fluorocarbons through effective utilization of the heat generated from waste incineration. ■ Dioxin countermeasures ■ Optimization technology for waste energy and input resources ■ For more details, please download the catalog or contact us.

• Hazardous material processing
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Responding to soil and underground contamination with a variety of combinations! DOWA Ecosystem's soil purification business conducts a comprehensive process from investigation to purification treatment and monitoring. We assess all conditions comprehensively to select the optimal treatment methods such as soil washing, chemical/thermal decomposition, and biodegradation. We address not only heavy metals but also VOCs (volatile organic compounds), oil contamination, as well as buried waste and complex contamination. ■□■Features■□■ ■ A reliable and reassuring support system due to the ability to handle everything from investigation to purification consistently ■ Conducting investigations with a focus on purification design ■ Advanced simulation analysis by geological specialists ■ Support for risk management ■ In addition to nationwide operations, we also widely respond to overseas investigations ■ For more details, please download the catalog or contact us.

• Hazardous material processing
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DOWA Ecosystem's recycling business has developed advanced technology capable of recycling 17 types of metals, including gold and silver, based on the mineral processing and smelting techniques cultivated in the metal smelting industry. Through this processing technology and DOWA Ecosystem's recycling network, we contribute to the establishment of a circular society. ■ Recovery of 17 Elements of Metals DOWA Ecosystem has established high-level technology for recovering precious metals such as gold and silver, which are contained in trace amounts in ores, through many years of mining and smelting operations. Currently, based on this technology, we recycle 17 types of metals. The recovered metal resources are transformed into products such as accessories, electronic circuit boards, films, and wires, circulating back into society. For more details, please download the catalog or contact us.

• Hazardous material processing
• Other services