What are the three reasons lime is the most commonly used chemical for pH and alkalinity adjustment?

Lime is the most commonly used chemical for pH and alkalinity adjustment primarily due to its availability, cost-effectiveness, and ease of feeding into water treatment systems.

Availability refers to how accessible lime is in various forms, such as quicklime (calcium oxide) and slaked lime (calcium hydroxide). This widespread availability ensures that water treatment facilities can source it reliably as part of their operations.

Cost-effectiveness plays a significant role, as lime is relatively inexpensive compared to alternative chemicals for pH and alkalinity adjustment. This affordability allows treatment facilities to manage operational costs while effectively controlling pH levels.

Ease of feeding denotes how straightforward it is to introduce lime into the treatment process. Its various forms can be easily integrated into existing systems, whether in dry or slurry forms, making it practical for continuous use.

These three factors—availability, affordability, and easy handling—contribute to lime's widespread adoption in water treatment processes, making it a preferred choice for adjusting pH and alkalinity efficiently.