Flush your toilet. Where does it go? Unless you're on a septic system, to a lift station probably.
The content of your toilet exits your house into the sewage main and is then piped to an in-ground storage pit usually made of concrete. These storage pits (also known as lift stations) usually are placed at the low end elevation of a neighborhood on municipally owned property. The lift station uses pumping and pumping controls to monitor the water level.
Ever seen a manhole cover in a park or on an easement? That's access to the lift station. Usually, there is a pump control panel nearby.
Inside these lift stations are pumps and liquid level controls. When the wastewater reaches a predetermined high level, the controller turns on the pump and the contents are forced toward the waste water treatment. After that chemicals, screens, and separators make the sewage suitable to be returned back into our ecosystem. -- Rich Kreekon