This PowerPoint deals with the various water purification processes carried while purify water at water treatment plant.

1. AA
Seminar Presentation OnSeminar Presentation On
Presented ByPresented By
Mr. AMIT H. SHIDURKAR
3rd Year degree in Civil Engg.
Prof. Shahade sir
Lect. Civil Engg. Dept..
GUIDED ByGUIDED By
Jagadambha college of engg. & Tech., ytl

2.  IntroductionIntroduction
 Object of purificationObject of purification
 Methods of purificationMethods of purification
 ScreeningScreening
 AerationAeration
 SedimentationSedimentation
 DisinfectionDisinfection
 ConclusionConclusion

3. INTRODUCTIONINTRODUCTION
 The treatment given to the water before supplying to theThe treatment given to the water before supplying to the
consumers is called as water treatment….consumers is called as water treatment….
 Water contains no. of impurities which to be removedWater contains no. of impurities which to be removed
 Various purification units constructed by municipality,Various purification units constructed by municipality,
corporationscorporations

4. OBJECTIVES OF PURIFICATIONOBJECTIVES OF PURIFICATION
To remove the hardness of waterTo remove the hardness of water
To remove the turbidityTo remove the turbidity
To remove the gasesTo remove the gases
To remove the objectionable tasteTo remove the objectionable taste

5. SCREENINGSCREENING
AERATIONAERATION
SEDIMENTATIONSEDIMENTATION
DISINFECTIONDISINFECTION
METHODS OFMETHODS OF
PURIFICATIONPURIFICATION

6. It is the process of removing large size particles.It is the process of removing large size particles.
To remove the floating particleTo remove the floating particle
To remove suspended particleTo remove suspended particle
SCREENINGSCREENING

7. SCREENSCREEN

8.  Coarse screen or Bar screenCoarse screen or Bar screen ::
This screen trap the coarser floating material,This screen trap the coarser floating material,
They are in bar grill, having diameter 25mmThey are in bar grill, having diameter 25mm
 Fine screenFine screen::
The size of these screen are small as compare toThe size of these screen are small as compare to
coarse screen, these screen retains the particle smaller ascoarse screen, these screen retains the particle smaller as
compare to coarse screen.compare to coarse screen.
TYPES OF SCREEN

9. AERATIONAERATION
 It is a process of bringing the water in intimate contact with airIt is a process of bringing the water in intimate contact with air
 To remove the carbon dioxideTo remove the carbon dioxide
 To remove the undesirable gasesTo remove the undesirable gases

10. AERATIONAERATION

11. METHODS OF AERATIONMETHODS OF AERATION
 Cascade aerationCascade aeration
 Air diffusion methodAir diffusion method
 Aeration fountainAeration fountain

12. CASCADE AERATIONCASCADE AERATION

13. CASCADE AERATIONCASCADE AERATION

14. AERATION FOUNTAINAERATION FOUNTAIN

15. SEDIMENTATIONSEDIMENTATION
It is the process of removing or reducing the turbidity ofIt is the process of removing or reducing the turbidity of
water by the removal of suspended impurities, so thatwater by the removal of suspended impurities, so that
suspended particles may settle down at the bottom due thesuspended particles may settle down at the bottom due the
force gravity.force gravity.
It removes the suspended as well as colloidal particleIt removes the suspended as well as colloidal particle

16. TYPES OFTYPES OF
SEDIMENTATIONSEDIMENTATION
Plain sedimentation:Plain sedimentation:
The principle of this method is force of gravity.The principle of this method is force of gravity.
In this sedimentation, a large particles can be removed.In this sedimentation, a large particles can be removed.
Sedimentation with coagulation:Sedimentation with coagulation:
In this process ,some coagulant such as aluminumIn this process ,some coagulant such as aluminum
sulphate, ferrous sulphate aresulphate, ferrous sulphate are
added in the impured water to form floc and to attract theadded in the impured water to form floc and to attract the
suspended impuritiessuspended impurities

17. SEDIMANTATION TANKSEDIMANTATION TANK

18. SEDIMANTATION TANKSEDIMANTATION TANK

19. COMMONLY USECOMMONLY USE
COAGULANTSCOAGULANTS
 Aluminum sulphate(alum)Aluminum sulphate(alum)
 Ferrous sulphateFerrous sulphate
 Chlorinated copperousChlorinated copperous
 Sodium aluminateSodium aluminate

20. DISINFECTIONDISINFECTION
 In this process, harmful bacteria are destroyed to makeIn this process, harmful bacteria are destroyed to make
the water acceptable for domestic as well as industrialthe water acceptable for domestic as well as industrial
uses.uses.
 The particle which are not remove by earlier process,The particle which are not remove by earlier process,
this particle to be removed by disinfection.this particle to be removed by disinfection.
 There are various methods adopted for disinfection.There are various methods adopted for disinfection.

21. METHODS OFMETHODS OF
DISINFECTIONDISINFECTION
 By boiling of waterBy boiling of water
 By ultraviolet raysBy ultraviolet rays
 By chlorinationBy chlorination

22. DESINFACTION BYDESINFACTION BY
ELECTROLYSISELECTROLYSIS