6.2.2. Wastewater treatment Sewerage systems

A sewerage system, or wastewater collection system, is a network of pipes, pumping stations, and appurtenances that convey sewage from its points of origin to a point of treatment and disposal.

(https://www.britannica.com/technology/wastewatertreatment/Sewerage-systems)

In this project, a sewage network was designed for the residential neighborhood, and this network was linear grid and closed network, that reaches all houses. This network consists of (8 inch) diameter tubes. This network represent in map (5). Also, this project relied on connecting the drainage network with septic tank; for water treatment (Look at figure (4)).

Wastewater quantities:

To calculate graywater per capita output. - Per capita Grey Water ratio =80% -Per capita water consumption per day= 150L

Solution:

Total water consumption in the neighborhood =815person×150 = 122250 L\person. Day

Total greywater production in neighborhood = 80% ×122250 = 97800 L In m^3 = 97800\1000= 97.8 m^3

Production in year= 97.8×365 = 35697 m^3

Figure (4): Septic tank Source: https://www.epa.gov/septic/types-septic-systems

Map (5): Sewage system Source: Researchers using AutoCAD