original_query: What is direct spray distillation?
query: What is direct spray distillation?
answer: Direct spray distillation (DSD) is a water treatment process used in seawater desalination and industrial wastewater treatment, brine and concentrate treatment, as well as zero liquid discharge systems.  It's a physical water separation process driven by thermal energy involving evaporation and condensation on water droplets sprayed into an evacuated chamber.