What is a common characteristic of wastewater generated from paper mills?

Wastewater generated from paper mills is typically characterized by high concentrations of dissolved solids. This is mainly due to the process of pulping and the chemicals used in the treatment and production of paper. During these processes, various materials, including wood fibers, fillers, and additives, are released into the wastewater. These components contribute significantly to the total dissolved solids (TDS) present in the effluent.

High levels of dissolved solids can pose environmental challenges when discharged into water bodies, as they can impact water quality and aquatic life. Understanding the composition of this wastewater is essential for treatment processes that aim to reduce its environmental impact before it is released into the environment.