Introduction

Water treatment plants are essential in providing clean and safe water for public consumption. One of the substances commonly used in water treatment is alum. In this article, we will explore the reasons why alum is used in water treatment plants.

What is Alum?

Alum, also known as aluminum sulfate, is a white crystalline substance that is commonly used in water treatment to remove impurities. It is a stable and non-toxic compound that is soluble in water. Alum is also used in other applications, such as paper manufacturing and as a flocculant in wastewater treatment.

How is Alum Used in Water Treatment?

Alum is added to water during the treatment process to remove impurities such as suspended solids, organic matter, and microorganisms. When alum is added to water, it reacts with the impurities and forms what is called a floc. The floc is then allowed to settle to the bottom of the treatment tank, where it can be removed through the sedimentation process.

Advantages of Using Alum in Water Treatment Plants

There are several advantages to using alum in water treatment plants. One of the most significant advantages is that it is an effective and affordable way to remove impurities from water. Alum is also a stable and safe compound that does not pose a health risk to humans or the environment. Additionally, alum can be easily obtained and transported, making it a convenient choice for water treatment plants.

Disadvantages of Using Alum in Water Treatment Plants

Despite its numerous advantages, alum does have some disadvantages when used in water treatment plants. One of the most significant disadvantages is that alum can increase the level of aluminum in the water. This can be a concern for individuals with kidney disease or other health issues. Additionally, the addition of alum can also increase the acidity of the water, which can be problematic for some industries that require high-purity water.

Conclusion

Overall, alum is a commonly used substance in water treatment plants due to its effectiveness, affordability, and safety. While it does have some disadvantages, such as increasing the level of aluminum in the water, these can be mitigated through proper monitoring and regulation. As long as water treatment plants continue to use alum responsibly and in accordance with regulations, it will remain a valuable tool in providing clean and safe water for public consumption.