What is the primary goal of lime treatment in water systems?

The primary goal of lime treatment in water systems is to soften water. Lime, which is calcium hydroxide, is commonly used in water treatment processes to reduce hardness caused by minerals such as calcium and magnesium. When lime is added to water, it reacts with the hardness ions, precipitating them out of solution and thus lowering the overall hardness of the water.

Softening is important for several reasons. It helps in improving the effectiveness of soaps and detergents, reduces scale formation in plumbing and appliances, and enhances the overall quality of water for various uses, including drinking, industrial processes, and agriculture.

While lime treatment can also influence pH levels, that is a secondary benefit rather than the primary goal. Disinfection is usually achieved through different chemicals or processes, and enhancing taste is not the main purpose of lime treatment either, although the overall improvement in water quality can indirectly contribute to a better taste. Thus, softening water stands out as the key objective of using lime in water treatment systems.