Further treatment of drinking water: แบบฝึกหัด

Which of the following further treatment methods uses ultraviolet (UV) light to make water safe for consumption?

Which of the following describes the correct position of further treatment in the overall process of making water safe for drinking?

Ozone (\(O_3\)) is a powerful disinfectant used in further treatment, but it must be generated on-site at the treatment plant. Which statement best explains why?

In the further treatment of drinking water, which of the following lists contains three methods specifically used to kill microorganisms?

Even after water has undergone sedimentation and filtration at a treatment plant, why is it still essential to carry out 'further treatment' using agents like ozone or ultraviolet light?

During the further treatment of drinking water, why is fluoride sometimes added, and what is its intended benefit?

Even if water appears clear after sedimentation and filtration, it must undergo further treatment. Explain why disinfection methods, such as the use of ozone or ultraviolet light, are biologically necessary before the water is considered potable.

Drinking water undergoes several treatment steps to ensure it is safe for human consumption.

a) Name two common methods used to kill harmful microorganisms present in drinking water.
b) Explain the primary reason why fluoride is sometimes added to drinking water.

A remote village relies on a nearby river as its primary source of drinking water. Analyses show the river water contains visible suspended impurities like silt, microscopic bacteria, and some dissolved mineral salts. The village plans to build a simple water treatment system.