Case Study

Sulzer Submersible Aerator Mixer Improves Wastewater Treatment In A Cardboard Mill

OKI-in-aeration-tank

Europac is a paper, cardboard, and packaging company with mills in Spain, France, and Portugal. The French site near Rouen specializes in corrugated cardboard and has a production of more than 300’000 tons per year. In the cardboard production process, Sulzer pumps and agitators are widely used.

The mill has its own biological wastewater treatment plant with a total capacity of 350’000 population equivalent. Once treated, the water is recycled in the mill or restored to the natural environment. The WWTP has been modernized regularly during the past years.

The effluents from the paper mill contain a high amount of organic matter. In the wastewater treatment plant, the effluents go through an anaerobic tower reactor prior to being aerobically treated in an activated sludge process. The aeration of the wastewater is done in successive basins — first in a circular tank with external bottom jet aerators and then in a rectangular lagoon with surface aerators. With the increase of the WWTP capacity, the oxygenation of both basins, especially the first one, had become insufficient. Therefore, Europac decided to upgrade the aeration performance of the existing installation with minimum capital expenditure in 2014.

access the Case Study!

Get unlimited access to:

Trend and Thought Leadership Articles
Case Studies & White Papers
Extensive Product Database
Members-Only Premium Content
Welcome Back! Please Log In to Continue. X

Enter your credentials below to log in. Not yet a member of Water Online? Subscribe today.

Subscribe to Water Online X

Please enter your email address and create a password to access the full content, Or log in to your account to continue.

or

Subscribe to Water Online

Sulzer Pumps Solutions Inc.