Efficient Wastewater Treatment in the Paper Industry with Energy and Water Recovery

Fibers, water and energy are all needed in large quantities to produce cardboard, paper or pulp. To survive in tough international competition, companies in the paper and pulp industry have been working for years to reduce their costs. With the wastewater technology of the DAS Environmental Expert GmbH manufacturers in the paper industry can not only reduce their fresh water demand significantly, but also the required energy amount. A well-designed wastewater treatment is of great importance to companies producing pulp, cardboard or paper. Regardless of which products are produced and which processes the respective plant applies — water is one of the most important resources. Water is needed in large quantities to make paper pulp out of fibres such as cellulose, wood or recovered paper.

If recovered paper is used, the print colours are often removed using a suitable de-inking process. The paper pulp is then treated with a range of additives such as fillers, colourants or auxiliary materials and finally processed into a paper web in the paper machine. Most of the water is removed at this point using meshes and heated cylinders. DAS Environmental Experts therefore are dedicated to support you with smart concepts on how to smartly use the wastewater from that process. In general, there are different approaches possible. To save on costs, some plants already handle water in a closed loop. Because of the costly nature of water processing, paper manufacturers around the world have in recent years worked hard to reduce their water footprint.