what can you see in the picture

What can you see in the picture

Where do I come from

ICome from

Rain

River

Lake

Well

Can you drink me

What am I Called

I am called sewage or waste water

I will tell you how I became like this

Ch.18 Waste StoryWater

PICTURE 1 PICTURE 2

What difference can you see ?

How you think I

became

Became like this ?

I will tell you how

industrial

water

riverside

Waste

How people make me dirty Home

Kitchen waste Cleaning the

house Watering plants

How people make me dirty

Hospital Disposal of

medicines Cleaning surgical

instruments

How people make me dirty Daily activities

Bathing Washing utensils Shaving

How people make me dirty

Mining Cleaning ore Other activities

How people make me dirty

Industries

Releasing chemical waste

Diluting chemicals

The waste from above all areas is called as the sewage.

The dissolved impurities are called as pollutants or contaminants

1.Phosphates & nitrates2.Metals like iron copper zinc

1.Urine & excreta2.Kitchen waste3.Animal waste

Organic impuritiesInorganic

impurities

Nutrients

SEWAGE

Bacteria1. Typhoid

bacteria2. Cholera

bacteria

1.Nitrogen2.Phosperous

PurificationOf

SewageFiltration Chlorination

Removing of impurities and contaminants

Using chlorine to clean water

Use of mouse is compulsory

1. Sewage is mainly generated from which of these?

Houses

Hospitalsoffices

Factories

2. Which of the process is used to remove dirt and sand from wastewater

Filtration

AerationChlorination

Sedimentation

3. Aeration of water during waste water treatment removes which of these?

Germs

Insoluble thingsHuman waste

Bacteria

4. Which of the process during wastewater treatment helps in killing germs

Flocculation

AerationChlorination

Sedimentation

5. Which of these disease can happen after drinking contaminated water

Small pox

MalariaCholera

Pneumonia

6. Jaundice affects which organ

Stomach

HeartLungs

Liver

7. Which method can be used to make ocean water fit for drinking

Chlorination

Reverse osmosisBoiling

Filtration

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