Abstract

The fumes emitted by thermomechanical and chemical-thermomechanical pulp and paper processes are respiratory tract and eye irritants. The products responsible for the irritation have not been identified.

A technical study of plant processes resulted in the identification of compounds emitted during thermomechanical pulp production. Only a- and ß-pinene, the principal components of turpentine, were present in significant concentrations. The contamination of workplace air by these substances is attributable to random equipment leaks. The integration of a caulking programme in the regular maintenance programme would reduce contaminant concentrations.

This project was launched at the request of the working community, and provided workers with information on the substances responsible for the irritation they reported. It is the first step in a comprehensive strategy aimed at resolving the problem of irritation in these plants.