DO YOU KNOW FROM WHERE WE GET CLEAN WATER? STREAMWATERTAPWATER
How each person is wasting water ? • Home – kitchen waste • Industries – chemical waste • Daily process – bathing , shaving • Mining waste - minerals • Hospital waste –blood , chemicals
The waste from above all areas is called as theSEWAGE • Sewage has dissolved and suspended impurities called CONTAMINANTS OR POLLUTANTS
Sewage is made up of following constituents • ORGANIC IMPURITIES e.g. urine, waste from kitchen, animals, plants, pesticides • INORGANIC IMPURITIES e.g.phosphates,nitrates,metals like iron, copper • NUTRIENTS e.g. nitrogen, phosphorus • BACTERIA & MICROBES e.g. typhoid microbe
PURIFICATION OF SEWAGE FILTRATION CHLORINATION Use of chlorine to clean water Removing the impurities and contaminants USABLE WATER SEWAGE ORWASTE WATER SEWAGE TREATMENT PLANT
SEWAGE TREATMENT PLANT/WASTE WATER MANAGEMENT A process of removing pollutants or contaminants from waste water.
IMPORTANCE OF WASTE WATERtreatment • The treated water from the sewage treatment plant is discharged in sea, river for further purification . • The treated water is used for agricultural activities like irrigation .
GOOD HABITS OF USING WATER • Turn off the tap while brushing. • Mop the floor instead of washing. • Repair the leaking taps or inform the elders. • Solid food remains should be thrown in the dustbin • Cooking oils & fats should not be thrown down the drain – blocks the drain • Chemicals like paints, solvents, medicines kill microbes that purify water