Efficiency of ozonation as a unit process in the treatment of secondary effluents form pulp and paper industry

摘要

Experiments were run in a batch reactor on samples of wastewater form pulping processes and paper makign after biologicla treatment (secondary effluent).The smaples were then treated in the following technological systems: ozonation alone; ozonation with alum or lime coagulation as a prior step,and ooznation with chlorination as a prior step.Of these,te coagulation-ozonation system was found to be the most effective,yielding high removal efficiencies.