Chemical Wastewater Treatment

4 February 2020
 Categories: , Blog


Chemical treatment is one of the most common techniques used in the treatment of wastewater. Perhaps this is because it is as convenient as it is effective in achieving the desired goal. The other wastewater treatment options include physical and biological water treatment.

This article will answer a few of the questions that you might have about chemical wastewater treatment.

What Is Chemical Wastewater Treatment?

Chemical treatment refers to the process of adding certain chemicals to wastewater in order to eliminate bacteria, making it fit for human use.

Chemical treatment is preferred over physical and biological wastewater treatment for various reasons. These include, but are not limited to the fact that water treatment chemicals are affordable and readily available.

Biological treatment, on the other hand, involves the introduction of special micro-organisms into the wastewater. Perhaps this explains why biological treatment is usually preferred for commercial as opposed to residential wastewater treatment plants.

Which Chemicals Are Used for Water Treatment?

Several chemicals can be used for the treatment of wastewater. Of these, chlorine is probably the most commonly used in the residential setup. The use of chlorine for the treatment of wastewater is known as chlorination.

Chlorination helps in the elimination of algae and mould which seeks habitat on the walls of residential water storage systems. Algae and mould are often responsible for the production of offensive odour from wastewater treatment systems as well as for giving the water a foreign, unpleasant taste.

The other chemical used in the purification of wastewater is hydrogen peroxide. Hydrogen peroxide is best for this job because its presence discourages the growth and survival of bacteria inside the wastewater.

It makes the wastewater environment non-conducive for various types of bacteria, thereby ensuring that such water remains bacteria-free at the end of the treatment. Just like chlorine, hydrogen peroxide is affordable and readily available hence the preference for residential wastewater treatment.

What Are the Disadvantages of Chemical Wastewater Treatment?

There are not so many disadvantages associated with the chemical treatment of wastewater. However, it is important to point out that some people have allergic reactions upon exposure to these chemicals.

Chemical treatment of wastewater should therefore not be done in the presence of such people. Hydrogen peroxide, for example, is known to cause skin irritation on a large number of people. Should you choose to use peroxide as your treatment chemical of choice, be sure to wear protective clothing while handling it.

To learn more, contact a wastewater treatment plant.