However, even with sophisticated effluent treatment systems, many pulp mills continue to release large quantities of dissolved organic matter such as tannins and other highly coloured humic substances.
Toutefois, malgrÃ© les systÃ¨mes perfectionnÃ©s de traitement des effluents, maintes usines de pÃ¢te continuent de rejeter de grandes quantitÃ©s de matiÃ¨re organique dissoute, comme des tannins et dâ€™autres substances humiques trÃ¨s colorÃ©es.