Understanding:Sanitation, Sewage Disposal at Public Places Video Lecture | Science Class 7

hello friends this video on wastewater
story part 10 is brought to you by exam
viacom no more fear from exam now have
you ever wondered that how sewage
disposal happens in places like
aeroplanes
so aeroplanes it's flying in the sky so
where do you think the sewage will get
this post because inside the aeroplane
also you have toilets so from where will
that wastewater go now airliner toilets
they use different mechanisms so some of
the mechanisms which they use are like
closed waste mechanism so in this case
what they do is they flush the
wastewater into an onboard sewage tank
so they have a big sewage tank in which
they just keep on collecting all the
wastewater and only then the plane lands
they again empty the sewage tank and
then again the same process continues so
that is called close to waste system
because they are keeping everything in a
closed tank in some airlines they also
use this technique of vacuum based
system in this the wastewater is sucked
into a tank now however in case of
Airlines leakage of wastes could become
a very serious safety concern in the air
because the plane is flying in the air
so if there is any leakage of there are
the waste water it is actually going to
impact people below right so in Airlines
actually they have different mechanisms
they have different ways of handling
sewage disposal so being again I am
repeating the same thing that being good
citizen we need to ensure that proper
sanitation is maintained in public
places because at our homes it is easier
to control things because it is our home
and we tend to keep it clean and do we
can't be I mean we can take good care of
the cleanliness but when it comes to
public places like hospitals or nursing
homes or schools colleges bags
railway stations so in such places a lot
of people are coming and different types
of people are visiting these places so
it is very important that people take
good care of cleanly
in public places so first of all you
should dispose wastes in dust bins a lot
of people when they use public toilets
they just flash solid materials they
just put paper tissue papers and so many
other solids touched into the flash and
the flash at all which is obviously not
a good thing so people should take care
that they do not litter around they
should throw the solid wastes only into
dust bins even if you do not find a
dustbin nearby you should carry it with
you at a very variable you see it has
been only there you should throw it
sanitary waste should be disposed of
appropriately because if you do not
again throw it off appropriately you
throw it here and there again the same
thing happens it cause it brings about a
foul smell microorganisms start growing
there it can lead to a lot of diseases
so these are some these are small things
which has to be done from our end but if
we all become aware enough to do these
things so I think a lot of diseases can
be avoided so with this we have reached
towards the end of this lesson so let us
look at some of the questions question
number one fill in the blanks cleaning
of water is a process of removing so
what are we removing we are removing the
undesirable substances which are called
Paul you hence wastewater released by
houses is called what does that
wastewater which is released from the
community the term which is used is
sewerage dry - is used as manual so that
drives sludge sludge is the solid waste
during the sewage treatment pod process
and since it is very rich in nitrates so
it can be tried to be used as a manual
because nitrates are excellent nutrients
for better growth of plants drains get
blocked by - and - so oils are one thing
which can block the drains facts are
another thing which can again block the
drains therefore we should take care
that we do not throw oils and fats into
the sink question number two what is
sewage explain why it is harmful to
discharge untreated
into reverse course scenes so series as
I said is the wastewater which needs to
be removed from a community for healthy
living
so the wastewater which comes out of
each of our houses that is nothing but
sewers now this room is contains a lot
of harmful substances like organic
wastes animal excreta urea in the form
of urine chemicals pesticides beans etc
now if it is directly disposed of it to
the river it will pollute the entire
river water and if the entire water gets
polluted what will happen the entire
aquatic life will get spoiled all the
living organisms living inside that
river or sea you will die
question number three why should boys
and fats be not released in the drain it
is also I mentioned that these oils and
fats depend to block the trains they
block the pipes so when they block the
pipe what happens smooth movement of the
wastewater doesn't take place so the
entire co-edit system then that
transport system of sewage gets
interrupted and also it fills pores and
thus why as I said soils have tiny pores
in between and that is filled by the
oils therefore water cannot fill those
spaces so water cannot pass through the
soil thank you please visit
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