What are the two main components found in large amounts in sewage?

A–Organic matter, B–Pathogenic microbes

The correct answer is (b) A–Organic matter, B–Pathogenic microbes.

Sewage is a complex mixture of waste materials that includes both organic and inorganic matter. The organic matter in sewage comes from various sources, such as human and animal waste, food scraps, and other biodegradable materials. This organic matter includes substances like proteins, carbohydrates, and fats.

Along with organic matter, sewage also contains pathogenic microbes, which are disease-causing microorganisms. These microbes can include bacteria, viruses, protozoa, and other harmful microorganisms. Pathogenic microbes can enter sewage through human and animal waste, contaminated water, or other sources.

Therefore, sewage contains a significant amount of organic matter, which serves as a nutrient source for microorganisms, and it also harbors pathogenic microbes that can pose health risks if not properly treated and managed.

It is important to treat sewage effectively to remove or neutralize organic matter and destroy or remove pathogenic microbes before it is released into the environment or used for various purposes like irrigation or water supply. Treatment processes such as biological treatment, filtration, disinfection, and sludge management are employed to ensure that sewage is properly treated and its potential health and environmental risks are minimized.