II. Sewer Networks and Facilities
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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
Kinds of Wastewater

  • Sewer (domestic or sanitary wastewater)

  • Industrial wastewater

  • Atmospheric (rain, rainfall) wastewater (runoff)


Kinds of wastewater1
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


Sewer quality sewer pipe network as a biological reactor
Sewer QualitySewer Pipe Network as a Biological Reactor


Kinds of wastewater2
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 wastewater3
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 sewerage yard sewer network quarter sewer network
General Scheme of SewerageYard sewer network Quarter sewer network


General scheme of sewerage1

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
Kinds of Sewerage Schemes (Patterns) subcatchments borders; 2 - collectors of second


Kinds of sewerage schemes patterns regional sewerage pattern
Kinds of Sewerage Schemes (Patterns) subcatchments borders; 2 - collectors of second Regional Sewerage Pattern