Human: What is the difference between a septic system and a sewage treatment system? Assistant: 
The primary difference between a septic system and a sewage treatment system is that a septic tank treats waste water from a home, while a sewage treatment plant handles wastewater from multiple homes. A septic tank uses biological processes to break down organic matter in the wastewater, while a sewage treatment plant typically employs physical and chemical processes to remove pollutants from the wastewater before it is released into the environment. Additionally, septic tanks are generally designed for small-scale residential use, whereas sewage treatment plants can be used by large communities.