yashveer and group 6 viii c
TRANSCRIPT
Topic : potable water
and purification of water
Group members: yashveershubhamprabalhimanshiaradhana
DRINKING WATER
% OF WATER IN WORLD.
A wastewater treatment plant (WWTP) or wastewater treatment works is an industrial structure designed to remove biological or chemical waste products from water , thereby permitting the treated water to be used for other purposes.
CHEMICAL METHODS
The removal of esp. from sea water to make drinkable
Desalination plant
FILTRATION
Filtration provides the additional opportunity for separation of small dirty particles. Some home water filtration systems can remove chemical contaminants for example, but fail to effectively remove microbiological ones (bacteria) from your water supply. Therefore, these are not "purifiers" in the true sense of the word.
ChlorinationThe leading advantage of chlorination that it has
proven effective against bacteria and virus ; it cannot inactivate all microbes like protozoa. When the
microbes is exposed by the chlorine , it inactivate the microbes by damaging the cell and enters and damage
the microbes.
Many households use boiling as the method for obtaining safe drinking water. Boiling kills the germs present in the water. Boiling is a physical method of purification of water.
BOILING
WE SHOULD NOT DRINK DIRTY WATER , OTHEWISE THE YOU MAY WATERBORNEDISEASE.
Steps to save waterAvoid wastage of water.
Do not keep the water running
Plant more trees.
Grow plant which require less water.
Reduce water pollution.
Build more dams…. This will prevent both drought and floods.
Harvest rain water.
Save water ,save life
RULES
1) 25 SECOND SHOULD BE GIVEN TO ANSWER.
2)CORRECT ANSWER 2 POINTS.
3) WRONG ANSWER -1 POINTS
WATER WHICH IS SUITABLE FOR DRINKING
A) POTEBLE WATER B) POLLUTING WATER
C)CHLORINATION D) NONE OF THESE.
WHAT TYPE OF FILTER IS POPULAR?A) CIRCLE TYPE B) CANDLE TYPE
C) OVAL TYPE D) NONE OF THESE
HOW MANY % OF IS WITHOUT SAFE DRINKING WATER
A)20 B) 30
C)25 D)50
CHLORINATION IS ______ METHODA) CHEMICAL B) PHYSICAL
C) CHLORINE D) NONE OF THESE
CHLORINATION IS DONE BY ADDING ______ TO THE WATER.
A) BLEACHING POWDER B) CHLORINE
C)VINEGAR D) BOTH A AND B.
A TAP THAT DRIP ONCE EVRY SECOND WASTE A _____ OF LITRES.
A)1000 B)100
C)10 D)1
FILTRATION IS A ____ METHODA)CHEMICAL B) PHYSICAL
C) CHLORINE C) NONE OF THESE
WE SHOULD NOT USE MORE _____ TABLETS THAN SPECIFIED IN CHLORINATION.
A) BLEACHING B)CHLORINE
C) VINEGAR D)NONE OF THESE