How sewerage works
If the aqueduct is used to deliver large quantities of drinking water to population centres, the sewerage system is used to remove harmful water quickly and continuously. It includes the connections to individual users (domestic or industrial) and the sewerage collectors, which converge into the "backbone" of the system to be taken to the water treatment plant. In fact, human activity discharges large quantities of pollutants into water. That is why dirty water must be collected and cleaned up by means of a treatment process before it is released into rivers and seas.
Harmful waters are understood to mean both waste water and rainwater (stormwater). Waste water includes domestic water, which comes from homes but also from public and private buildings, water generated by street cleaning and watering, and water used by industrial plants. The sewerage system generally flows naturally: waste water flows by gravity from a built up area to the treatment plant. Along this route, depending on the obstacles found in the territory and the height requirements, there may also be lifting plants that use a series of electric pumps to lift the waste water mechanically to the next stage of the route.
