Pulp & Paper Industry: Industrial Effluent Treatment and Water Recycling

The use of decentralised and production-integrated wastewater treatment has considerably contributed to the reduction of water consumption in the production of the pulp and paper industry. Yet the reduced wastewater volumes contain a higher concentration of contaminants, which keep exceeding the discharge limit values for the wastewater, especially when producing wood-pulp paper, waste paper or pulp. Besides, the wastewater from the pulp and paper industry cannot be compared to conventional municipal wastewater due to the different products and production types, the acid sulphite or the alkaline sulphate process and lime precipitations.

Apart from their disadvantages, such as space requirement, odour formation, consumption of chemicals, etc., this is one of the reasons why conventional aeration tanks are more and more replaced with modern processes adapted to the requirements
of the industry.

In many cases, these modern processes also allow an easy upgrade for water recycling, i.e. cycle closing of process water, and contribute thus significantly to an economical production.

WEHRLE owns a wide range of experience and technologies in regard to raw water and effluent treatment and is able to use tailor-made processes or process combinations. Not only the technical solution but also the best possible cost-effectiveness
of the plant is thus a priority to us.