Efforts to Reduce the Use of PRTR Substances by Switching Boiler Treatment Chemicals

Abstract

As one of our Corporate Social Responsibility （CSR） activities, we efforts to reduce environmental load, and reduction of Pollutant Release and Transfer Register （PRTR） substances is regarded as an important issue.

Nippon Paper Industries Co., Ltd. Iwanuma Mill had used the PRTR substances such as hydrazine and cyclohexylamine as boiler treatment chemicals in black liquor recovery boiler, but we switched to “Amine- carboxylate treatment” which is not regulated in PRTR.

As a result, the boiler has stably operated for five years, and inside the boiler drum and turbine blade have been improved preferable condition.

On the other hand, higher pressure plants still use the PRTR substances, and we think that switching of boiler treatment chemicals for these plants should be considered.