This document discusses methods of waste water treatment. It begins by defining waste water and its sources. It then outlines the main objective of waste water treatment as managing discharged water to reduce pollution. The document discusses various treatment methods like advanced oxidation processes, sewage systems, and technical methods. These methods include preliminary treatment to remove large objects, primary treatment using sedimentation to remove solids, secondary biological treatment using bacteria or algae, and final clarification before discharge. The goal is to reduce measured levels of pollutants like COD and BOD.

1. METHODS OF WASTE WATER
TREATMENT
PRESENTOR
SHAIK NAGUR SHAREEF
161FA04195
VIGNAN’S UNIVERSITY

2. Contents
Introduction
Objective
Elements of waste water
Impact of waste water
Treatment methods
conclusion

3. What is waste water?
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 Domestic effluent consisting of blackwater and graywater.
 Water from commercial establishments and institutions,
including hospitals.
 Industrial effluent, stormwater and other urban run-off.
 Agricultural,horticultural and aquaculture effluent, either
dissolved or as suspended matter.

4. Main objective
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To manage water discharged
from homes, businesses, and
industries to reduce the threat of
water pollution.

5. Components present in waste
water
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 Hardness
 Alkalinity
 COD
 BOD
 Inorganic material

6. Impacts
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 Water pollution
 Loss of blue carbon sink
 Ecological Imbalance
 Biodiversity
 Loss of fisheries livelihood
 Climate change

7. Wastewater effect on
environment
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9. Singapore: Water Treatment &
Wastewater Recycling Systems
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 The Public Utilities Board (PUB), Singapore’s
national water authority, has outsourced some
$3.0 billion worth of water infrastructure
projects
* Deep Tunnel
* Sewerage System
* Marina Barrage
* desalination

10. Treatment techniques
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 AOP or APOP
Advanced OxydationProcess
 Sewage system
To treat sewage water
 Technical method
To treat large mass of water

11. AOP or APOP
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 Advanced Oxidation Process
 Principle

12. Process
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15. Action of AOP
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16. Sewage system
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17. Technical method
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 Pre-treatment
 Preliminary treatment
 Primary treatment
 Secondary treatment
 Sludge (bio solids) disposal

18. Process
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Water discharged from homes, businesses, and
industry enters sanitary sewers
Water from rainwater on streets enters storm water
sewers
Combined sewers carry both sanitary wastes and
storm water
Water moves toward the wastewater plant primarily
by gravity flow
Lift stations pump water from low lying areas over
hills

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20. Preliminary Treatment
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Removes large
objects and non-
degradable
materials
Protects pumps
and equipment
from damage
Bar screen and
Grit chamber

21. Preliminary treatment
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22. Measurement and sampling at
the inlet structure
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 A flow meter continuously records the volume
of water entering the treatment plant.
Water samples are taken for determination of
suspended solids and B.O.D.
Measurements of Suspended Solids and B.O.D.
indicate the effectiveness of treatment
processes.
Both Suspended Solids and B.O.D. decrease as
water moves through the wastewater treatment
processes

23. Primary Treatment
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 A physical process.
 Wastewater flow is
slowed down and
suspended solids settle
to the bottom by
gravity
 W the material that
settles is called sludge
or bio solids

24. Primary Treatment
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25. Secondary treatment
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26. Secondary treatment
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 Secondary treatment is a
biological process
 Utilizes bacteria and algae to
metabolize organic matter in the
wastewater
 In Cape Girardeau secondary
treatment occurs on the trickling
filter
 the trickling filter does not
“filter” the water
 water runs over a plastic
media and organisms
clinging to the media remove
organic matter from the
water.
 From secondary
treatment on the trickling
filter water flows to the
final clarifiers for further
removal of sludge.
 The final clarifiers are
another set of primary
sedimentation tanks.
 From the final clarifiers
the water is discharged
back to the Rivers.

27. Secondary treatment
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 The final clarifiers remove
additional sludge and
further reduce suspended
solids and B.O.D.
Disposal of sludges
 The sludge undergoes lime
stabilization to kill potential
pathogens
 The stabilized sludge is
disposed into agricultural
fields

28. Conclusion
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 water is one of the most important source on
earth
 It is known as universal solvent
 We must not waste the water
 The waste water that we obtain from our daily
purposes and from industries must be treated in
treatment systems inorder to reduce pollution.
 our govt must provide facilities and
infrastructure to avoid water pollution and
manage wasre water.

29. Thank you
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