How do factories clean water?

Factories typically clean water through various treatment processes, including filtration, sedimentation, and chemical treatment. Filtration removes solid particles, while sedimentation allows heavier contaminants to settle at the bottom. Chemical treatments, such as the addition of chlorine or other disinfectants, eliminate harmful bacteria and pathogens. Advanced methods, like reverse osmosis or UV treatment, may also be employed for more thorough purification, ensuring the water meets environmental regulations before discharge or reuse.