why distillation is not used in town and cities
Answers
Answer:
Distillation is one of the oldest methods of water treatment and is still in use today, though not commonly as a home treatment method. It can effectively remove many contaminants from drinking water, including bacteria, inorganic and many organic compounds.
Your first step toward solving a suspected water quality problem is having your water analyzed by the local health department or a reputable laboratory. A water analysis not only verifies if a water quality problem exists, but is essential to determine the most appropriate solution to the problem. State or local health officials can interpret water analysis results. Some labora- tories may also provide this service.
Home water treatment should be considered only a temporary solution. The best solutions to a contaminated drinking water problem are to stop the practices causing the contamination or change water sources.
Distillation
Distillation relies on evaporation to purify water. Contaminated water is heated to form steam. Inorganic compounds and large non-volatile organic molecules do not evaporate with the water and are left behind. The steam then cools and condenses to form purified water.
Distillation effectively removes inorganic compounds such as metals (lead), nitrate, and other nuisance particles such as iron and hardness from a con- taminated water supply. The boiling process also kills microorganisms such as bacteria and some viruses. Distillation removes oxygen and some trace metals from water. For this reason some people claim distilled water tastes flat.