Effluent treatment is one of the chief concerns of pulp and paper mills. Pulp mills need to efficiently produce pulp as well as treat the effluent at a reasonable cost. Typical BOD5 (biochemical oxygen demand) concentrations from pulp mills range from 100 to 5,000 ppm BOD5. In addition, this wastewater is toxic to fish, low in dissolved oxygen levels, and usually hot. Prior to discharge, wastewater needs to be neutralized, oxygenated and cooled to properly control the organics in the wastewater.

Jet aeration systems use a combination of pumps and blowers to provide efficient oxygen transfer and mixing. Jet aeration systems efficiently treat pulp and paper mill wastewater while requiring little maintenance. For these reasons, jet aerators are often considered the best method of treating wastewater for pulp and paper mills.