Water purification

by

K.Devika

Water purification

Contents: Introduction Methods of water purification Industrial purification Purification of sewage water/waste water

Introduction

Importance of water Sources of water Necessity of water purification

Methods of purification

Specific methods are involved in treatment of water that are categorized below

Sedimentation/screen pre filtration clarification

Sedimentation

Involves filtration Pressure type filters are used to

sedimentate the particles different type of filters are used to separate different type of substances

Filtration

TYPE OF FILTER ITS USAGE

sand filters Neutralizing filters Oxidizing filters Activated carbons Cartridge filters

Removes turbidity Neutralizes low pH Oxidizes &

precipitate Fe,Mn,HS. Reduces halogens &

remove salts Filters micro fibers

like poly propylene

Clarification

TYPE OF TREATMENT ITS USE

Water softening Organic scavenging Distillation Electro dialysis Reverse osmosis Nano filtration Micro filtration Ion exchange

systems

Removes Ca,Mg,Fe with softeners

Traps bases that are regenerated with NaCl

Removes both organic &inorganic contaminants

Reduces ionic content of water Rejects the virus & bacteria

like pyrogens Removes organic compounds

of 300-1000 M.Wt Removes protozoa & virus Removes ionic contents

Industrial purification

Industrial purification

Treatment of sludge water

Treatment of sludge water involves two steps

1.Pre treatment2.Industrial treatment

The water obtained from secondary pre treatment is purified industrially as said above for usage.

Even the water is purified there is a chance to present some of the viruses to destroy such viruses primitive methods like boiling has to be done before consuming.

Thanking you

yours sincerely,K.Devika

(M.Sc organic chemistry)