Initiatives for Reduce Waste

At Ushio, waste processing information is shared between Group companies and business sites in Japan. In addition, initiatives such as recycling have been strengthened, aiming to curb total waste emissions.

Collection of Lamps for Recycle

A recycling program was started in 2007 for super high-pressure UV lamps for semiconductor and LCD exposure operations. We have since also launched a recycling initiative for xenon lamps for cinema projection equipment. Xenon lamps contain tungsten, one of the rare metals. Lamps collected by the program are turned into products or returned to society through 3R activities.

Xenon lamp recycling flowchart

Initiatives for Reduce Water Use

From 2020 onward, we have positioned the reduction of water usage as an important theme, and have set a goal of reducing the water usage of the Ushio group by 3% compared to FY2019 by 2025, and we have started our initiatives to reach our goals.
 
This goal was set based on the results of analyzing the water usage and usage of the entire group. As Ushio group entered a semiconductor manufacturing business, we recognized a sharp increase in water consumption. In addition, we found out that a circulating water system has already been installed, and there is little room for reduction of water usage. However, we are working on improvements by considering savings through ingenuity, reviewing the manufacturing process, and installing additional circulating water system.

Reducing the Amount of Harmful Chemical Substances Used

In fiscal 2011, our efforts to reduce the amount of harmful chemical substances used included conducting a survey of the status of usage at each business site. Based on the survey findings, we decided to reduce our use of volatile organic chemicals (VOCs) in line with the recommendation of four electrical machinery and electronics associations in Japan. Since fiscal 2012, we have been reducing the consumption of VOCs by means of reviewing our production facilities.

Initiatives at the Harima Division

The Harima Plant is working to reduce the use of chloroform, which may cause pollution due to air release that occurs in our lamp manufacturing process. Specifically, we introduced two sealed automatic equipment, reduced the opening of the hood, and consolidated facilities using chloroform from two tools to one. However, in recent years, the number of productions has been increasing and the size of products has been increasing. As a result, the volume of use has been increasing more than the amount generated by reduction efforts, we are further strengthening our efforts to this end.
 
Furthermore, as regulations on chemical substances have become stricter year by year, we expect to reduce the use of chemical pharmaceuticals other than chloroform by reducing the size of hood openings and reviewing the amount of wind drainage when changing the layout, and also by reducing the amount of evaporation.
In addition, in order to create a safer work environment, we are taking an initiative in eliminating hazardous substances by examining chemical pharmaceuticals with a high-level risk assessment for chemical substances as substitutes.

Amounts of Chloroform Usage

Fiscal 2016 Fiscal 2017 Fiscal 2018 Fiscal 2019
7.0 t 8.7 t 9.3 t 9.0 t

In addition, Ushio makes a concerted effort to act appropriately, including by using alternatives to other chemical substances.

Initiatives at the Gotemba Division

Since 2017, we have been reviewing risk assessments by visualizing chemical substances through monitoring the amount of chemical substances used once every 6 months and by patrolling chemical substance storage sites every month.
In order to prevent the leak of hazardous substances into rivers and underground infiltration, we constantly monitor the pH and fluorine concentration when releasing them from our fluorine wastewater treatment facilities. To deal with an event of an abnormal pH and fluorine concentration, we have introduced a facility that stops it.

As for underground permeation, all pipes through which hazardous substances flow are double-walled so that anomalies in the pipes can be detected immediately without burying them as much as possible.
In addition to installing a dike in the place where hazardous substances are stored, and we put a coating on the concrete surface to prevent permeation so that underground permeation does not occur.