Pollution Prevention and Resource Recycling

Basic Approach

The management of hazardous chemicals, waste, and wastewater must be reliably handled in accordance with laws and regulations. The Daifuku Group has been working to reduce the burden on the global environment, including local communities, through the prevention of environmental pollution and resource conservation. We have also set building a foundation to promote the resource recycling as a critical issue area in the Daifuku Environmental Vision 2050, and we are working on improving the recyclability rate of our products and establishing a system for resource recycling at our production sites.

Green procurement

We believe that it is our mission to manufacture environmentally friendly products as we expand our business globally. Under the motto, “We will not buy, use, or sell any hazardous materials,” we formulated our Green Procurement Guidelines in November 2005 to eliminate certain hazardous chemical substances and prioritize the purchase of materials and products that are resource- and energy-saving and reusable.

Major Initiatives

Resource saving

We are committed to reducing defective products from our manufacturing processes, reducing packaging materials, and conserving water at our production sites and offices.

Waste generated (Japan) *Including valuable wastes

Recycling rate of waste (Japan) *Including valuable wastes

Water consumption (Japan)

Water consumption (Non-Japan)

Ensuring appropriate waste disposal

Site reviews conducted by Daifuku's employees
Site reviews conducted by Daifuku's employees

Waste generated by business activities is processed appropriately in accordance with laws and regulations. Even when waste processing is outsourced to a subcontractor, meaning that the outsourcing operator takes responsibility for proper processing, Daifuku carefully chooses the best outsourcing companies and visits their facilities annually to ensure that waste is handled properly.

Pollutant reduction

Management of chemicals

Paints and organic solvents are the primary chemical substances used by Daifuku in its production facilities. The Company manages and controls the usage amounts of special chemical substances on-site as designated under the PRTR (Pollutant Release and Transfer Register) Law.*

  • *A law that requires enterprises to submit a report to their national governing authority specifying the number and volume of chemical substances they are releasing into the environment. This is aimed at voluntary management of chemical substances and the prevention of environmental pollution.
Emission and transfer volume of chemical substances related to PRTR Law

Shiga Works

  FY2018 FY2019 FY2020 FY2021
Emission and transfer (kg) 23,765 18,531 16,880 20,542
Amount of PRTR-related chemical substances handled in FY2021

Shiga Works


Control No. Chemicals Transaction Volume Emission to Transfer to
Air Public water Soil Land Total emissions Sewage Misc Total transfer
37 Bisphenol A 1,247.40 0 0 0 0 0 0 24.95 24.95
53 Ethylbenzene 5,014.59 5,014.59 0 0 0 5,014.59 0 0 0
80 Xylene 6,219.47 6,219.47 0 0 0 6,219.47 0 0 0
296 1,2,4-Trimethylbenzene 589.10 589.10 0 0 0 589.10 0 0 0
297 1,3,5-Trimethylbenzene 222.09 222.09 0 0 0 222.09 0 0 0
300 Toluene 8,059.42 8,059.42 0 0 0 8,059.42 0 0 0
  • Note:Chemical substances of which less than 100 kg is handled are omitted as the amounts are negligible.

Compliance with European harmful substance regulations

The entire Daifuku Group focuses on the European REACH (Registration, Evaluation, Authorization, and Restriction of Chemicals) regulations,* and goes to great lengths to visualize and remove any harmful chemicals in its products. The Company continues to offer environmentally friendly products through implementation of Green Procurement Guidelines by looking at its entire supply chain.

  • *Companies must register and evaluate the safety of chemical substances contained in the products they manufacture and sell in Europe.

Air pollution prevention

Based on Ordinance 25, Clause 1 of the Ordinance Concerning the Reduction of Impact on the Air Environment of Shiga Prefecture, the Shiga Works is designated as a "place of business subject to a plan to reduce its environmental impact on the air." We are striving to control and reduce smoke-related air pollutants.

Result of final air pollutant measurements in FY2021

Shiga Works (according to the Hino Town environmental pollution control agreement)

Material Facility Regulation value Results
Max Min Avg
Dust (g/m3N) Dynamos 0.1 0.006 0.004 0.006
Sulfur oxide (SOx) (m3N/h) Dynamos 2.31 0.060 0.050 0.057
Nitrogen oxide (NOx) (ppm) Dynamos 950 920 750 825

Preventing water pollution

Water quality survey
Water quality survey

The Shiga Works, which accounts for approximately 80% of Daifuku’s water consumption in Japan, maintains a 24-hour continuous monitoring system with three wastewater treatment facilities that ensure water quality on par with agricultural water by thoroughly complying with drainage standards established by the Shiga Prefecture Ordinance and Pollution Control Agreement with Hino Town. In addition, we invite neighboring residents and provide opportunities to visit our wastewater treatment facilities and see our thorough water quality management systems, which facilitates good relationships with stakeholders.

We recognize that water pollution is an important issue that broadly affects soil, agricultural produce, living environments, and more. We not only comply with laws and regulations, but also make meticulous efforts to manage and reduce wastewater.

Result of final effluent quality measurements in FY2021

Shiga Works (in accordance with the Water Pollution Prevention Act, prefectural ordinances, and the Hino Town pollution control agreement)

Measurement item Regulation value Results
Max Min Avg
Amount of drainage (m3/day) - 443.3 73 307.7
pH 6.0~8.5 7.4 6.7 7.1
SS (mg/ℓ) 20 or less 0.8 0.5 0.6
COD (mg/ℓ) 20 or less 2.4 0.3 0.7
BOD (mg/ℓ) 20 or less 3.0 1.0 1.4
Total phosphorus (mg/ℓ) 1 or less 0.1 0.1 0.1
Total nitrogen (mg/ℓ) 10 or less 1.2 0.5 0.6
  • Note:The average value is the weighted average.
  • Effluent treatment facilities

    Effluent treatment facilities

  • Effluent before (left) and after (right) treatment

    Effluent before (left) and after (right) treatment

Recycling sludge into cement materials

At the Shiga Works' wastewater treatment facility, it is necessary to treat the sludge produced to maintain stable water treatment. The dewatered sludge withdrawn from the facility is treated using a dryer and is turned into dried sludge with 20% water content. This has led to a large reduction in excess sludge as well as a reduction in waste treatment cost. Furthermore, dried sludge is put to good use as a raw material for cement.

  • Sludge recycling facility

    Sludge recycling facility

  • Dried sludge

    Dried sludge

Resource recyclingKPI

We offer a large-scale material handling system consisting of many parts and materials. Daifuku Environmental Vision 2050 aims to circulate resources not only when waste is generated from business activities but also when equipment delivered to customers is removed. From that point of view, we will review the product materials and improve the ease of disassembly from the design stage.

In addition, we have positioned the stable operation of the system for a long period of time and delaying the timing of disposal as an important initiative, and will enhance after-sales services such as maintenance.

Daifuku Environmental Vision 2050

  Scope FY2021
Recycling rate of waste Global 99%
Recyclability rate for new products Global 86%