HOME >> CSR 2013 Top >> Feature3 DOWA's Eco-products

Environmental ReportFeature3 DOWA's Eco-products

The DOWA group promotes production of eco-products that considers environment throughout their life cycles from the production process to the disposal process.

In four fields of 1) Materials, 2) Parts and Components, 3) Products and 4) Services, we strive to develop and produce eco-products. Eco-products mean those products and services that are eco-friendly considering conservation of resources and environment at each stage of production, usage and disposal. We try to reduce environmental burden when we produce our products. We endeavor to offer parts and components contributing to energy saving of end products and reduction of environmental burden. We try to recycle metals after they are used as well as disposing of waste.

Diagram 11.Surface treatment, Cr-Dope-N9.Energy-saving heat treatment furnace7.Nitride-based HEMT structure epitaxial substrates10.Silver powders for solar panelsMR* (laminate) LED6.Deep ultraviolet LED5.Low lead zinc4.Biodiesel fuel3.Technology to remove radioactive cesium from incinerator fly ash2.Recycling of cerium from glass grinding materials

Recycling of heavy and rare metals with bryophytes

Recycling of heavy and rare metals with bryophytes

Services
Development of metal recycling technology with funariales (Joint study with German Institute of Physical and Chemical Research)
Targets
Heavy and rare metals (lead and gold, etc.)
Environmental performance
Conservation of resources and water environment/at recycling
Feature
Recycling technology to use completely new function of plants

Recycling of cerium from glass grinding materials

Recycling of cerium from glass grinding materials

Services and Materials
Recycling of grinding materials for glass and lenses
Targets
Rare earth (cerium)
Environmental performance
Reduction of waste/at disposal Conservation of rare earth resources/at recycling
Feature
Approximately 90% of high recycling rate

Technology to remove radioactive cesium from incinerator fly ash

Services
Effective removal of water soluble cesium from incinerator fly ash. Development of materials and the separation process through joint study with the Jikei University
Targets
Incinerator fly ash generated by burning waste affected by a nuclear power plant accident
Environmental performance
Safe waste disposal/at disposal
Feature
Reduction of concentration of radioactive cesium from 3,800Bq*/kg to 1,500Bq/kg in the demonstration experiment
*Bq: Becquerel (Unit to indicate the amount of radioactivity)

Biodiesel fuel

Biodiesel fuel

Services
Recycling of diesel engine fuel (alternative fuel for light oil) from used cooking oil jointly with Okayama City
Targets
Used cooking oil from households, restaurants and food manufacturing factories
Environmental performance
Reduction of CO2 emission/in use
Reduction of waste/at disposal
Feature
Okayama City uses the fuel for garbage trucks and buses.

Low lead zinc

Low lead zinc

Materials
High quality zinc ingot of 1ppm or less that is one tenth of conventional lead component
Applications
High safety for new applications for medical and food fields
Environmental performance
Improvement of safety/in use
Reduction of hazardous substances/at disposal
Feature
Prevention of environmental contamination and risk to health by lead

Deep ultraviolet LED

Deep ultraviolet LED

Parts
LED that can output deep ultraviolet of 350 nm or less
Applications
Resin hardening, adhesion, drying, medical treatment, analysis, photocatalyst or water purification
Environmental performance
High efficiency, long life cycle and energy saving/in use
Reduction of hazardous substances (lead-free)/at disposal
Feature
Wavelength (300nm or less) to realize disinfection and sterilization of water or material surface efficiently

Nitride-based HEMT structure epitaxial substrates

Nitride-based HEMT structure epitaxial substrates

Materials and Parts
Materials for power semiconductor devices
Applications
Power supply of household electric appliances, high output products including servers and antennas for base stations of cell phones, hybrid cars and electric cards
Environmental performance
Energy saving/in use
Feature
Resistant to high voltage and with low electric resistance to reduce power loss to one thirds compared to conventional silicon-based substrates

MR* (laminate) LED

MR* (laminate) LED

Parts
High output infra-red LED chips with a bonding technology that bonds a highly functionalized epitaxial thin film substrate consisting of several tens of crystalline layers in a nanometer order to the substrate with a metal reflection part.
Applications
Proximity sensors for smart phones
Environmental performance
Energy saving/in use
Feature

Less power consumption by high output
*MR: Metal Reflection

Energy-saving heat treatment furnace

Energy-saving heat treatment furnace

Products
Carburizing furnace for heat treatment of automobile parts
Targets
Automobile parts including engines and transmissions
Environmental performance
Energy saving and reduction of CO2 emission/in use
Feature
Approximately 50% reduction of CO2 emission from existing facilities

Silver powders for solar panels

Silver powders for solar panels

Materials
Silver powders to cater for various particle shapes (spherical and flakes) and distribution of granularity
Applications
Sliver paste used for electrodes of photovoltaic cells (crystal, silicon-based photovoltaic cell)
Environmental performance
Improvement of functions of photovoltaic cells/in use
Feature
World top share of silver powder production for photovoltaic cells

Surface treatment, Cr-Dope-N

Surface treatment, Cr-Dope-N

Services
Surface treatment of metal materials (physical vapor deposition)
Targets
Mold to form powder, plastic and rubber
Environmental performance
Energy saving, reduction of CO2 emission and reduction of hazardous substances/at production
Longer life of products/in use
Feature
Safe without hazardous substances such as hexavalent chromium, cadmium and lead
←Prev Next→ ↑Page Top