Sewage management is basically the process by which the waste is treated for the advantage of man. There are different processes involved in sewage treatment; they are the sewage, treating and screening of the sewage. This also involves disposing of the sewage in such a way that it does not cause any hazard or harm to nature and the health of humans also. In this article, you are going to get a brief knowledge about sewage management and why it is necessary to perform sewage management.

1. Management of Sewage
and
Organic Wastes
TREN 3P14: Sustainable
Integrated Waste Management

2. Controlling Water
Pollution
• Upstream:
before the problem occurs
• Downstream:
after the problem occurs

3. • domestic sewage treatment:
– preliminary: screening and removal of
large contaminants
– primary: straining and settling of solids
– secondary: removal of biodegradable
organic matter and nutrients
– tertiary: removal of residual dissolved
nutrients and pollutants
Downstream Methods of
Sewage Treatment

4. • effluent treatment processes:
– mechanical: filtering, gravity separation
– chemical: flocculation, coagulation
– biological: microbes or macrophytes
aerobic or anaerobic
– disinfection: chlorination, ozonation, etc.
(pathogen control)
Downstream Methods of
Sewage Treatment

5. Primary Sewage Treatment
BAR
SCREEN
GRIT
CHAMBER
SETTLING
TANK
CHLORINATION
TANK
SLUDGE
DIGESTER
SLUDGE
DRYING
BED
Raw sewage
Sludge
outflow

6. Secondary Sewage Treatment
BAR
SCREEN
GRIT
CHAMBER
SETTLING
TANK
CHLORINATION
TANK
AERATION
TANK
SETTLING
TANK 2
SLUDGE
DIGESTER
SLUDGE
DRYING
BED
Activated sludge
outflow
Air
pump
Raw sewage
Methane

7. • E. Coli contamination of municipal water supply
from cattle manure results in hundreds of
illnesses and seven deaths, including two-year
old child
• Tragedy deemed preventable
• Incompetent management by Koebel brothers
(managers of water supply), lack of adequate
water testing, excessive budget cutbacks and
deregulation all identified as factors in tragedy
Walkerton