Initiatives for Reducing Impacts on the Environment Back Number (2014)
Back to Latest Initiatives for Reducing Impacts on the Environment
Basic Approach
Plant effluents and emissions can be a source of water, air, and soil pollution that poses a threat to local communities. At the Minebea Group, we believe that harmony with local communities is indispensable to our business activities, and as such, we are striving to reduce our impact on the environment.
Results of FY2013 Initiatives
In order to ensure compliance with the environmental laws and regulations of each country and community, the Minebea Group has established environmental standards surpassing its legal requirements and undertakes daily compliance monitoring. In FY2013, there were no incidents which violated either the legal requirements or the Group's own standards. The Group also monitors the impact of its plants on the surrounding communities by conducting environmental patrols at all of its plants to ensure there are no leakages, foul odors, noise, or vibration caused by the plants.
Plant Initiatives
Plant Wastewater Purification
Prior to releasing wastewater into rivers, Minebea Group plants use their own processing equipment to purify wastewater to within fixed environmental standards. These plants adhere to environmental laws of the countries and localities in which they operate, and independently monitor such wastewater discharges, including regular testing for such metrics as pH*1, COD*2, BOD*3, SS*4, and the oil content of n-hexane extracts*5.
In FY2013, no anomalous monitored values were reported by any plant. In addition, no complaints relating to these metrics were received.
- *1 pH : A scale indicating whether substances are acidic or alkaline. pH7 is neutral. pH values below 7 indicate increasing acidity, while values above 7 indicate increasing alkalinity.
- *2 COD (chemical oxygen demand) : The amount of oxygen consumed to oxidize organic substances (pollution) in water. COD measurement takes less time than BOD measurement, but is less reliable. COD is generally used as a metric in wastewater management for sea, lake, and marsh waters.
- *3 BOD (biological oxygen demand) : The amount of oxygen required for bacteria to consume and decompose organic matter (pollution) in water. Higher values indicate greater degrees of pollution. Measurement takes several days. BOD is generally used to observe effluent water in rivers.
- *4 SS (suspended solids) : The volume of substances suspended in water. The higher the number, the greater the degree of water pollution.
- *5 n-hexane extracts : Substances extracted from oils and detergents that are difficult to volatilize in water using a substance called n-hexane as solvent. In this report they signify mineral oils.
Investigating Landfill Waste Sites (Japan, Thailand, China, etc.)
Inspection of waste disposal companies in Japan
At each plant and office, there are types of waste which are difficult to reuse or recycle within the site. In these cases, the waste is disposed of through third-party waste disposal companies.
The Minebea Group selects reliable waste disposal companies, and conducts regular inspections of their disposal sites to confirm the status of waste disposal and management. In Japan, employees in charge of waste disposal and management at each plant have begun using a common checklist form to confirm the on-site status of disposal sites. We will continue to cooperate with waste disposal companies to ensure that their waste disposal processes do not generate soil, water, or air pollution.
Inspections of waste and recycling operators in Thailand
Inspections of waste and recycling operators in China
Operation of Plant Wastewater Zero System (Thailand, China)
Minebea Group plants that use large amounts of water during processing are taking measures to reduce wastewater emissions. Though water is discharged from plants only after being purified to standards mandated by environmental regulations in each country and region, the wastewater may still have an impact on the local environment. To address this issue, in Thailand and China, where water use by the Group is high, plants have introduced the "Plant Wastewater Zero System" designed to reduce to zero the wastewater emissions and the impact on the environment.
Under this system, water that previously was purified and discharged is purified to a higher level and the entire discharge reused within the plant to eliminate external emissions. The "Plant Wastewater Zero System" has been introduced at the Bang Pa-in and Ayutthaya plants in Thailand along with the Shanghai and Xicen plants in China.
Bang Pa-in Plant "Plant Wastewater Zero System"
Xicen Plant "Plant Wastewater Zero System" building
Management of PRTR-controlled Substances (Japan)
In accordance with the Pollutant Release and Transfer Register (PRTR) Law, all of our places of business in Japan manage the amounts of PRTR-controlled substances used and transported.
Reported Results for FY2013
| Control number | Substance name | Volume handled | Emission Volumes | Transfer volumes | ||
|---|---|---|---|---|---|---|
| Air | Water | Landfill | Waste | |||
| 71 | Ferric chloride | 3.60 | 0 | 0 | 0 | 0 |
| 309 | Nickel compounds | 0.35 | 0 | 0.01 | 0 | 0.1 |
| 384 | 1-bromopropane | 15.63 | 15.09 | 0 | 0 | 1.88 |
| 438 | Methylnaphthalene | 5.46 | 3.11 | 0 | 0 | 0 |
| Total | 25.04 | 18.21 | 1.98 | |||
Training to Prevent Oil Spills (Japan)
Oil spill prevention training at the Karuizawa Plant
The Karuizawa Plant carries out disaster-prevention exercises three times a year and includes drills to contain an oil spill as part of its measures to prevent leak accidents. The training tests personnel under real-life disaster simulations. During the exercises, upon the announcement of an earthquake, radio communications are made to plant patrols and the disaster-response headquarters from a special oil spill countermeasures team, while responders deploy oil-absorbent mats to prevent the spread of oil.
Implementation of Emergency Response Training (China)
Emergency Response Training being conducted at the Shanghai Plant
The Shanghai and Xicen plants in China conduct emergency response training through chemical substance leak simulations.
The Environmental Safety Committee at each plant conducts the training to minimize human injury and environmental pollution by taking appropriate measures in the event of a leak. The training is held annually for manufacturing division employees handling hazardous chemicals substances, suppliers of hazardous chemical substances, hazardous materials recovery companies, and cleaning companies.
In FY2013, the Shanghai Plant held a training session on April 15 for 49 personnel, consisting of 34 manufacturing division employees and 15 employees of outside contractors. The Xicen Plant also held a session on April 16 for 31 of its manufacturing division employees as well as 17 employees from the Suzhou Plant. During the sessions, members of the Environmental Safety Committee's Chemical Substances Management Group and the local fire departments trained participants on deploying absorbent materials to prevent the spread of hazardous chemicals during a spill, measures to take in the event of injuries, and emergency communication procedures.
Future Issues and Goals
The Minebea Group continues to conduct business operations in compliance with environmental laws in Japan and around the world, and is proceeding with cleanup work in areas where it has caused environmental contamination in the past.
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