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| In-House Treatment of Used Developer to Produce No Polluted Mud |
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At the Fukuyama site where ICs are manufactured, we used to hire a subcontractor to incinerate spent developer, which makes up 70% of all our industrial waste. This method placed a significant burden on the environment, including the energy used for incineration and exhaust gas from the vehicles transporting the waste. Treatment costs swelled as production increased. It was a challenging issue for us, from both an environmental and managerial standpoint.
We at the Fukuyama site had been pursuing in-house treatment for spent developer, and we finally completed a fluidized waste treatment system using natural purification in 1996.
This system is based on a concept of purifying spent developer by natural processes. Built according to our proprietary design, it is a state-of-the-art system that produces no hazardous sludge during the treatment process. |
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| Microorganisms Purify Water, Sustain Monitoring by Fish |
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Sharp's system makes the maximum use of materials existing in nature. In the microorganism treatment process, microorganisms cultured to high levels of density are used to decompose most of the main components in spent developer that have strong alkalinity.
In the oyster shell treatment process, neutralizing treatment is carried out using a film of microorganisms that forms on the surface of oyster shells to decompose other organic substances.
In the Bincho charcoal/bio-activated charcoal treatment process, charcoal agents absorb a slight amount of the remaining organic substances. The charcoal is cleansed automatically, as the absorbed organic substances are treated by microorganisms growing on the surface of the charcoal.
In the fish monitoring process, in addition to measuring instruments, water safety is monitored with freshwater fish, such as roaches and Japanese bitterlings, which are sensitive to environmental changes. |
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| A Major Contribution to Management |
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hrough the development of the fluidized waste treatment system, treatment costs have been reduced by approximately 1/30 compared to that of commissioned treatment.
Evaluated for its promotional efforts, the Fukuyama site received the 1997 ChairmanŐs Prize and the 1999
Ministry of International Trade and Industry Prize, Recycling Promotion Achievement Award, from the Recycling Promotion Association.
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| Certificate of honor:1999 Ministry of International Trade and Industry Prize from the Recycling Promotion Association |
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| Natural purification waste fluid processing system |
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| Features of fluidized waste treatment system using natural purification |
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Based on microorganic cultures that exist in nature. |
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Maximizes use of materials existing in the natural world. |
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Complate decomposition produces no waste. |
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Spent developer is treated without using chemical agents. |
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Treated water is safe for the natural environment. |
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| The treated water becomes clean enough for environmentally sensitive freshwater fish to live in.(an image photo) |
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