1. Typology of different options for metal recycling by Private Sector
3/November/2016
Takanobu Tachikawa
DOWA Eco-System Co., Ltd.

2. The origin of DOWA -Established in 1884 as mining company
-Treating “black-ore” which contains a lot of impurity
-Changed materials from “ores” to “recyclables”

3. Mining to Waste Management & Recycling
<Mining and Smelting Business>
Minerals
Air Pollution Control
Metals : 99.99%
Gold, Silver, Copper,
Zinc, Cadmium, etc.
Smelting
& Refining
Exploration
Mining
Transportation
Separetion
Ore
Copper 1%
Zinc 5～8%
Mineral Concentration
Copper 20～30%
Zinc 50%
Rocks
Ore Deposits
Gold, Silver, Copper, Zinc, Lead, Cadmium, Arsenic, etc. +
Minerals
Rocks
Mine Waste Deposit (Dam)
Metal Recycling
<Environmental Management Business>
Clean-uped Soil for reuse
Soil Remediation
Soil
Metals
Survey
Excavation
Transportation
Decontamination
Soil contamination
Lead, arsenic, cadmium, etc.
Residue + + +
Mine Waste Deposit (Dam)
Metals
Oils
VOC
Soil
Landfill Site
※Soil Contamination = contaminants created by humans
Waste management
Examination
Collection/Transportation
Separation/Incineration etc.
Air Pollution Control

4. Metal Recycling Technology of DOWA
New Type Furnace for Secondary Materials Au Ag Zn Ga Bi Pt Pd Rh Sb Ru Sn Cu Cd Pb Ge In Se Te S Co Li Ni

5. DOWA’s Network in Asia Metal Recycling Soil Remediation
Waste Management
(Landfill)
Soil Remediation
Waste Management
(Incineration)
Waste Management
(Landfill)
Metal Recycling
Soil Remediation
Waste Management
(Landfill)
Metal Recycling
Soil Remediation
Waste Management
(Incineration)
Metal Recycling

6. Establishment of inter Asian recycling system
３R Framework in Asia
Recycling and suitable treatment system
in each country.
Now, each country is operating their own recycling. But sometime those are only manual separation. Thus, it is useful to establish ‘Inter Asia Recycling System’ in order to increase recycling efficiency by applying a sophisticated process and to protect environment.
Establishment of inter Asian recycling system

7. Waste/Recycle material flow
＝DOWA’s target
Generator
collection
Regulated by law
Municipal
waste
Industrial
waste
Food
waste
Wood
sewage
Home
appliance
Car
dismantling
Domestic waste
package
Soil
remediation
segregation/
separation
Segregation/separation
segregation/
separation
Construction
scrap
Oil recovery
Biomass
Incineration
PCB’s
incineration
Recycle
melting
Cement
Nonferrous
metals
Landfill
Thermal recycle/
Electric generation
composting
paper
aluminum
iron
concrete
Rare
metals
BDF
wood
plastics
gypsum
ASD・SD

8. Key Points from our experience
Generator
collection
Collection
How to collect recyclables/waste efficiently
Regulated by law
Municipal
waste
Industrial
waste
Food
waste
Wood
sewage
Home
appliance
Car
dismantle
Domestic waste
package
Soil
remediation
2. Treatment
How to treat recyclables/waste properly, flexibly
segregation/
separation
Segregation/separation
segregation/
separation
Construction
scrap
Oil recovery
Biomass
Incineration
PCB’s
incineration
Need to consider more close co-operation, industry reorganization, cross-border co-operation in Asia-Pacific (e.g. Asia Pacific Waste Management & Recycling Centre)
Recycle
melting
Cement
Nonferrous
metals
Landfill
Thermal recycle/
Electric generation
composting
paper
aluminum
iron
concrete
Rare
metals
BDF
wood
plastics
gypsum
ASD・SD

9. Key Factors for Promoting 3R Activities
1. Law enforcement
2. Manufacturing
5. Waste management/
Recycling
4. Awareness of citizens
3. Collection

10. “Operation oriented” to “3R oriented”
1. Law enforcement
Opinion, Request,
Advice, etc
2. Manufacturing
5. Waste management/
Recycling
4. Awareness of citizens
3. Collection

11. Our mission at DOWA ECO-SYSTEM is
to discover, nurture and bring to life the ideals
of people and companies who share our planet.