Question

What is sewage?

Answer 1

Sewage is liquid waste. It consists of wastewater from houses, offices, factories, hospitals, etc. It is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease-causing bacteria, and other microbes.

Answer 2

Sewage is a collective term for municipal wastewater, which includes both liquid and solid wastes produced in cities and towns and transported via sewers. Chemically, sewage consists of approximately 99% water and 1% solid waste, which may be organic or inorganic in nature. Sewage typically contains bacteria (e.g., coliforms, streptococci, clostridia, lactobacilli), microfungi, protozoa and microalgae.