What is one of the primary uses of distillation technology in industrial wastewater treatment?

Distillation technology is primarily employed in industrial wastewater treatment for solvent recovery due to its effectiveness in separating volatile substances from liquids. The process involves heating the wastewater to convert the solvents into vapor, which is then condensed back into liquid form. This allows for the purification and collection of valuable solvents that can be reused, minimizing waste and reducing environmental impact.

In contrast, the other options do not accurately reflect the primary function of distillation in this context. Water filtration typically focuses on removing solids and particulates from water rather than separating solvents. Sludge removal addresses the solid waste by-products generated during treatment processes rather than focusing on volatile substances. Biological treatment relies on microorganisms to degrade organic pollutants, which is distinctly different from the physical separation method utilized in distillation. Thus, solvent recovery is the primary application of distillation technology in the realm of industrial wastewater treatment.