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II. Sewer Networks and Facilities Topic II.1. Kinds of Wastewater. General Scheme of Sewerage. Kinds of Sewerage Schemes (Patterns). Sewerage
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II. Sewer Networks and FacilitiesTopic 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.
Kinds of Wastewater • Sewer (domestic or sanitary wastewater) • Industrial wastewater • Atmospheric (rain, rainfall) wastewater (runoff)
Kinds of Wastewater Sewer (Sanitary Wastewater) • Specific flowrates (norms) - 90 % of specific water supply norms • Sewer regime • Sewer quality • Suspended solids (SS) • Organic substances - 60 % (BOD5) • Inorganic substances - 40 % • Sewer quality - technical slang • Grey wastewater - from hygiene water use, washing machines, etc. • Black wastewater - from toilets flushes
Kinds of Wastewater Industrial Wastewater • Specific flowrates (norms) - depend on: • Kind of the industry • Kind of the industrial technology • Kind of the equipment • Technological discipline • Industrial wastewater regimes • Industrial wastewater quality • Conditionally clean • Polluted
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
General Scheme of SewerageYard sewer network Quarter sewer network
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 General Scheme of Sewerage
Kinds of Sewerage Schemes (Patterns)Regional Sewerage Pattern