Sewerage System: Terms and Definitions

UNIT - IV

PLANNING AND DESIGN OF SEWERAGE SYSTEM

TERMS AND DEFINITIONS

1. Sanitary Sewage Waste Water generated from a community (residential, commercial buildings and industries) - Domestic Sewage + Industrial Sewage.

2. Domestic Sewage = Waste Water discharged from lavatory, urinals, water closets from residential and office buildings.

3. Industrial Sewage = Waste Water discharged from industrial and commercial establishment.

4. Night Soil = Human and Animal excreta.

5. Refuse sullage, Soild. Liquid and Semi-Solid waste thar includes garnages, rubbish sullage, sewage, subsoil water and storm water.

6. Garbage = Dry refuse-paper, decayed vegetables, street sweepings, organic and untreated putrifying organic matter etc.

7. Rubbish = Solid Waste like building material, furniture rags, papers, etc.

8. Sullage Waste Water from Bathroom and Kitchen.

9. Storm Water = The rain water of a locality.

10. Sewage = Liquid Waste from a community that includes sullage, discharge from urinals, latrines, industrial waste, ground and storm waters.

11. Sewerage = Structures, Devices, Equipments, Appurtenances intended for collection, transportation, pumping of sewage and liquid waste but excluding treatment of sewage.

12. Sewer It is an under-ground conduit or drain through which sewage is carried to a point of discharge or disposal.