In accordance with the Waste Disposal and Public Cleaning Law, we report our waste through electronic manifests.
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Environmental Protection
Industrial Waste
The Mitsui Chemicals Group aims at minimizing the landfill rate for industrial waste to 1% or less. We promote waste recycling, waste reduction by incinerating it using recovered energy, and reduction of industrial waste emissions outside of our plants in order to reduce the amount of waste ultimately disposed of. We have continuously succeeded in minimizing the volume of industrial waste, reaching another landfill rate target for industrial waste in fiscal 2022.
*Please refer here for scope of data.
Industrial Waste Minimization Initiatives
To minimize industrial waste, the Mitsui Chemicals Group is working to understand and reduce the negative impact of generated waste on the environment and society by improving manufacturing processes and monitoring the waste disposal status at companies to which we outsource work.
On-Site Initiatives
- Raw polymers generated in the manufacturing process are returned to the ethylene cracker and recycled. (Chemical recycling)
- Incineration of waste oil, including fuel use and energy recovery.
- Reduction of waste emissions outside the plant by neutralizing and dehydrating waste acid.
Off-Site Initiatives
- Reuse as solid material for fuel.
- After incineration, the ash is recycled into concrete materials and roadbed materials.
- Fuel use and energy recovery from waste oil.
Industrial Waste Treatment Process (FY2022)
*Unit: Thousand tons
*Any minor discrepancies in percentages are due to rounding.
*The calculation is based on the volume of hazardous industrial waste generated by Mitsui Chemicals, Inc. and Domestic subsidiaries & affiliates.
*1 Volume of generated waste:
Calculated based on the type of industrial waste as defined in the Waste Disposal and Public Cleaning Law, including sludge (after dewatering), waste plastic, soot, and dust.
*2 Onsite Recycling volume:
Recycling within plant facilities.
*3 Onsite Incineration with energy recovery:
Amount of reduction in waste discharged outside the plants from within plant facilities. All incinerated ash after incineration is included in the total amount of offsite industrial waste volume.
*4 Offsite Recycling volume:
Amount recycled off-site, including waste reused as cement raw material, etc.
*5 Offsite Incineration with energy recovery:
Volume disposed of by incineration off-site. The figures assume total loss and incinerated ash is counted as landfill waste.
*6 Final disposal amount (landfill):
Includes landfill of incinerated ash after incineration.
Recycling of Waste Plastics
Among waste materials, the Mitsui Chemicals Group maintains a recycling ratio of more than 90% for waste plastics discharged outside its plants.
In particular, in response to the Law for Promotion of Recycling of Plastic Resources, we are striving to maintain a high recycling rate, targeting an annual waste plastic volume of 20,000 tons or less and a recycling rate of 95% or higher in fiscal 2030.
In fiscal 2022, our waste volume was 16,200 tons and the recycling rate was 95.8%, achieving the target.
Processing of plastic industrial waste (Mitsui Chemicals, Inc. : FY2022)
*Unit: Thousand tons
Landfill Rate for Industrial Waste (Mitsui Chemicals Group)
*Landfill rate for industrial waste = Landfill volume/Volume of generated industrial waste
Recycling Ratio (Mitsui Chemicals Group)
*Recycling ratio = Offsite recycling volume/Offsite industrial waste volume (generated outside the factory premises)
Initiatives to Reduce Disposal of Hazardous Waste
The Mitsui Chemicals Group has established disposal rules for waste containing hazardous substances as industrial waste to be disposed of as specified controlled industrial waste. This is in accordance with company rules, and strict management is in place to ensure that the waste is disposed of appropriately.
First of all, the Mitsui Chemicals Group is eliminating hazardous substances by incineration or detoxifying them to the extent possible. For example, acidic toxic gases are alkalized (neutralized) through a detoxification facility and converted to other non-toxic substances before disposal.
In addition, off-site hazardous waste is disposed of at a specified controlled disposal facility and reported in an electronic manifest.
In accordance with the "Act on Preventing Mercury Pollution of the Environment," no new mercury-containing substances will be used. Mercury contained in fluorescent lamps, etc. in use is disposed of appropriately as specified controlled industrial waste in accordance with company rules.