Question

what is removed from sewage after it is treated? biological contaminants

Explanation:

Sewage treatment processes aim to remove harmful substances. Biological contaminants like bacteria, viruses, and parasites are a key target. Treatment methods such as biological filtration, activated sludge processes, and disinfection (e.g., chlorination or UV treatment) are used to eliminate these contaminants, making the treated water safer for discharge or reuse.

Answer:

Biological contaminants