Calcium oxide solution, commonly known as lime water when suspended in water, is widely used in environmental and industrial applications. It is primarily employed in water treatment to adjust pH, neutralize acidic water, and remove impurities such as carbon dioxide and heavy metals. In wastewater treatment, it helps precipitate contaminants and reduce sulfate and phosphate levels. In the construction industry, calcium oxide is used in mortar and plaster due to its ability to react with carbon dioxide and harden over time. It plays a key role in soil stabilization, improving the load-bearing capacity and reducing the plasticity of clay-rich soils. It is also utilized in flue gas desulfurization processes in power plants, where it reduces sulfur dioxide emissions, helping meet environmental regulations. In agriculture, it is applied to soils to neutralize acidity and enhance nutrient availability for crops. Additionally, calcium oxide solution finds use in the food industry for processing sugar from sugar beets and in the production of certain food additives, where it acts as a firming or pH control agent. Its strong alkaline nature makes it effective in various chemical manufacturing processes, including the production of calcium chemicals and steel.