The objectives of this program were to characterize the various effluents from a newly built Kraft pulping mill, study the high rate of anaerobic digestion of a selected wastewater from the Kraft mill, study of photosynthetic system which can treat the effluent from the digester in high-rate oxidation ponds, and operation of a bench scale system for the treatment of the selected mill wastewater, incorporating the results of the two explored technologies.