Effect of in-process treatment on contaminant levels during the recycling of paper-mill water streams

Abstract

A simple mass balance model was developed to predict the contaminant levels which would arise if various fractions of process water were biologically treated, and then recycled within the paper mill. It is feasible to treat only a portion of the effluent prior to recycling and still maintain a sufficiently low concentration of contaminants so as to minimize any problems such as equipment plugging, runnability, or undesirable product appearance.