Purification of water

AASeminar Presentation OnSeminar Presentation On

Presented By Presented By

Mr. AMIT H. SHIDURKAR3rd Year degree in Civil Engg.

Prof. Shahade sirLect. Civil Engg. Dept..

GUIDED By GUIDED By

Jagadambha college of engg. & Tech., ytl

IntroductionIntroduction Object of purificationObject of purification Methods of purification Methods of purification Screening Screening AerationAeration Sedimentation Sedimentation DisinfectionDisinfection ConclusionConclusion

INTRODUCTIONINTRODUCTION The treatment given to the water before supplying to the The 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

OBJECTIVES OF PURIFICATIONOBJECTIVES OF PURIFICATION

To remove the hardness of water To remove the hardness of water

To remove the turbidity To remove the turbidity

To remove the gasesTo remove the gases

To remove the objectionable tasteTo remove the objectionable taste

SCREENINGSCREENING

AERATIONAERATION

SEDIMENTATIONSEDIMENTATION

DISINFECTIONDISINFECTION

METHODS OF PURIFICATIONMETHODS OF PURIFICATION

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 particleTo remove suspended particleTo remove suspended particle

SCREENINGSCREENING

SCREENSCREEN

Coarse screen or Bar screen Coarse 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 to The size of these screen are small as compare to

coarse screen, these screen retains the particle smaller as coarse screen, these screen retains the particle smaller as compare to coarse screen.compare to coarse screen.

TYPES OF SCREEN

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 gases To remove the undesirable gases

AERATIONAERATION

METHODS OF AERATIONMETHODS OF AERATION

Cascade aerationCascade aeration Air diffusion methodAir diffusion method

Aeration fountain Aeration fountain

CASCADE AERATIONCASCADE AERATION

CASCADE AERATIONCASCADE AERATION

AERATION FOUNTAINAERATION FOUNTAIN

SEDIMENTATIONSEDIMENTATION

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

TYPES OF TYPES 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 In this sedimentation, a large particles can be removed.removed.

Sedimentation with coagulation:Sedimentation with coagulation:In this process ,some coagulant such as aluminum In this process ,some coagulant such as aluminum sulphate, ferrous sulphate are sulphate, ferrous sulphate are added in the impured water to form floc and to added in the impured water to form floc and to attract the suspended impuritiesattract the suspended impurities

SEDIMANTATION TANKSEDIMANTATION TANK

SEDIMANTATION TANKSEDIMANTATION TANK

COMMONLY USE COMMONLY USE COAGULANTSCOAGULANTS

Aluminum sulphate(alum)Aluminum sulphate(alum)

Ferrous sulphate Ferrous sulphate

Chlorinated copperousChlorinated copperous

Sodium aluminateSodium aluminate

DISINFECTIONDISINFECTION In this process, harmful bacteria are destroyed to In this process, harmful bacteria are destroyed to

make the water acceptable for domestic as well make the water acceptable for domestic as well as industrial uses.as industrial uses.

The particle which are not remove by earlier The particle which are not remove by earlier process, this particle to be removed by process, this particle to be removed by disinfection.disinfection.

There are various methods adopted for There are various methods adopted for disinfection.disinfection.

METHODS OF METHODS OF DISINFECTIONDISINFECTION

By boiling of waterBy boiling of water

By ultraviolet raysBy ultraviolet rays

By chlorination By chlorination

DESINFACTION BY DESINFACTION BY ELECTROLYSISELECTROLYSIS