Sewage/Wastewater TreatmentBy: Sasan Kordrostami

Distribution of earth’s water

Earth's Water

Salin

Fresh Water

Ice-caps and Glaciers

Fresh surface water

LakesSwampsRivers

2%

97%

3%

68.7%

30.1%

0.9%

87%

11%

Source: Gleick (1996)

Why is it essential? Removes the pollutants

Preserves wildlife and aquatic creatures.

It promotes health concern.

More than 1000

years ago

• Invention of irrigation • ‘’Mayan civilization ended due to drought’’ Gill, R. B. (2001).

1800’s

• Polluted water caused different diseases.

• "Year of the Great Stink" in London

1972• Human finds the need to protect water

Historical Perspective

•New Generation of treatment ...

Water pollutants

Water Pollutants

Sewage and Domestic wastes

Pesticides

Fertilizers

Industrial wastes

Heavy metals

Soap and Detergents

Primary Treatment

Secondary treatment

Tertiary Treatment

Stages of wastewater treatment

Sedimentation

Biological treatment

Nutrient, Toxic compounds and solids

Preliminary Treatment

Removal of large objects

Source: Mujeriego, R., & Asano, T. (1999).

Thank you

Gill, R. B. (2001). The great Maya droughts: water, life, and death. UNM Press.Gleick, P. H. (1996). Basic water requirements for human activities: Meeting basic needs. Water international, 21(2), 83-92

Mujeriego, R., & Asano, T. (1999). The role of advanced treatment in wastewater reclamation and reuse. Water Science and Technology, 40(4), 1-9.

References: