Biodegradable Pollutants in Sewage

Sewage is the wastewater generated from households, industries, and commercial establishments. It contains a wide range of pollutants, including organic and inorganic compounds, nutrients, pathogens, and suspended solids. However, the majority of these pollutants are biodegradable in nature. Let's discuss in detail:

Definition of Biodegradable Pollutants

Biodegradable pollutants are the organic compounds that can be broken down or decomposed by natural processes, such as microbial activity, into simpler substances, such as water, carbon dioxide, and methane, which are not harmful to the environment.

Examples of Biodegradable Pollutants

- Human and animal waste
- Food waste
- Paper and cardboard
- Plant matter
- Cleaning agents and detergents
- Oils and fats

How Sewage Constitutes Biodegradable Pollutants

Sewage contains a high concentration of biodegradable pollutants, mainly organic compounds from human and animal waste, food waste, and detergents. These pollutants are typically broken down by microorganisms, such as bacteria, fungi, and protozoa, during the natural biological treatment process that takes place in wastewater treatment plants. The microorganisms use the organic pollutants as a source of food and energy, and convert them into carbon dioxide, water, and other harmless byproducts.

Benefits of Biodegradable Pollutants

The biodegradability of pollutants is an important factor in determining their environmental impact. Biodegradable pollutants are less harmful to the environment because they can be broken down by natural processes and do not accumulate in the environment.

Conclusion

In conclusion, sewage constitutes mainly biodegradable pollutants, which can be broken down by natural processes and do not pose a significant threat to the environment. Proper wastewater treatment is necessary to ensure that these pollutants are effectively removed before the treated water is released into the environment.

Domestic sewage constitute biodegradable pollutants.