Transcript II. Sewer Networks and Facilities Topic II.1. Kinds of

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.
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Sewerage Service
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Kinds of Wastewater
 Sewer (domestic or sanitary wastewater)
 Industrial wastewater
 Atmospheric (rain, rainfall) wastewater (runoff)
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Kinds of Wastewater
Sewer (Sanitary Wastewater)
 Specific flowrates (norms) - 90 % of specific water supply norms
 Sewer regime
 Sewer quality
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Suspended solids (SS)
Organic substances - 60 % (BOD5)
Inorganic substances - 40 %
 Sewer quality - technical slang
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Grey wastewater - from hygiene water use, washing machines, etc.
Black wastewater - from toilets flushes
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Sewer Quality
Sewer Pipe Network as a Biological Reactor
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Kinds of Wastewater
Industrial Wastewater
 Specific flowrates (norms) - depend on:
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Kind of the industry
Kind of the industrial technology
Kind of the equipment
Technological discipline
 Industrial wastewater regimes
 Industrial wastewater quality
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Conditionally clean
Polluted
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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
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General Scheme of Sewerage
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General Scheme of Sewerage
Yard sewer network
Quarter sewer network
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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
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discharge
Kinds of Sewerage Schemes (Patterns)
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Kinds of Sewerage Schemes (Patterns)
Regional Sewerage Pattern
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