1. 1 II. Sewer Networks and Facilities Topic II.1. Kinds of Wastewater. General Scheme of Sewerage. Kinds of Sewerage Schemes (Patterns) Sewerage Definition: A set of pipe networks, facilities and technical measures, aimed at collection, transportation, purification of wastewater from urban, rural or industrial territories and safety discharge it into the receiving water bodies.

2. 2 Sewerage Service

3. 3 Kinds of Wastewater §Sewer (domestic or sanitary wastewater) §Industrial wastewater §Atmospheric (rain, rainfall) wastewater (runoff)

4. 4 Kinds of Wastewater Sewer (Sanitary Wastewater) §Specific flowrates (norms) - 90 % of specific water supply norms §Sewer regime §Sewer quality l Suspended solids (SS) l Organic substances - 60 % (BOD 5 ) l Inorganic substances - 40 % §Sewer quality - technical slang l Grey wastewater - from hygiene water use, washing machines, etc. l Black wastewater - from toilets flushes

5. 5 Sewer Quality Sewer Pipe Network as a Biological Reactor

6. 6 Kinds of Wastewater Industrial Wastewater §Specific flowrates (norms) - depend on: l Kind of the industry l Kind of the industrial technology l Kind of the equipment l Technological discipline §Industrial wastewater regimes §Industrial wastewater quality l Conditionally clean l Polluted

7. 7 Kinds of Wastewater Atmospheric (Rain) Wastewater (Runoff) §Rainfall quantity - depends on climate §Rainfall regime - depends on climate §Rainfall and runoff quality - depends on antophogenic impact

8. 8 General Scheme of Sewerage

9. 9 General Scheme of Sewerage Yard sewer networkQuarter sewer network

10. 10 General Scheme of Sewerage I, II and III - water sheds (subcatchments); 1 - subcatchments borders; 2 - collectors of second order; 3 - collectors of first order (submains);; 4 - main (trunk) collector; 5 - sewer pipeline (external trunk); 7 - pressure sewer pipeline; 8 - wastewater treatment plant (WTP); 9 - sewer discharge

11. 11 Kinds of Sewerage Schemes (Patterns)

12. 12 Kinds of Sewerage Schemes (Patterns) Regional Sewerage Pattern