Waste Water Story Part 1 Hello kids, you have seen in the video on water as to how essential water is for us. If there is water, there is life. Water is very important. Not only for humans, but also for animals, birds and plants. Due to increasing population, increasing industrialization, expansion in agriculture, increasing urbanization, the water level is decreasing. Is the water that is available for us clean and useful? In this video, we will learn about waste water and other aspects related to it. To know more on this subject, we take you to a village in Hariana. The objective of this video is to understand what is waste water. Hey Sunil, long time, wherever you all these days, you look very tired and sick. Yes, my friend, I was sick. I had fever and vomiting. Oh, is it? Doctor told me that I had fever due to water pollution. Hmm, look, sir has come to the class. Good morning, sir. Hello children, Sunil, how are you? I am fine, sir. I was ill. The doctor said that I had a water-borne disease. Children, can you tell us how we get sick due to water? Sir, when water is polluted, then we get water-borne diseases. Correct. People get sick due to waste water or dirty water. We will first learn what is waste water. Can anyone tell me how the water gets dirty? Sir, when we bathe and the water is filled with water, it becomes dirty water. Correct. Domestic water and the water that is generated after commercial use is called waste water or dirty water. The water that comes out from washing utensils, from bathing, washing of hands, washing of clothes etc is also dirty water. Yes, this water contains vegetable matter. Oil used in food, hair oil, detergent, floor dust, lubricated soapy water after washing the human body. This water is called grey water. Sir, there is water that we used in the toilets too. Right. The water released from flushing the human excretor and to wash is called black water or sewage. Children, when it rains or the drain is filled, you see that the water flows on the road. Observe this water. Try to color, smell or any other observation of this flowing water and discuss it with your teacher. All this water goes into the drains, isn't it, sir? Have you seen small and big pipes at your homes? Yes, we saw them. Pipes that carry dirty water are called sewers. One pipe is for good water management in our houses and other pipes bring out the dirty water from the house. Every 50 to 60 meters, there are manholes where two or more sewers are found. Sir, this muddy water causes water pollution when mixed with clean water. Where does this water go? If there is no good sewerage system, dirty water contaminates clean water and also becomes a factor for many fatal diseases. Old pipes, leakage in sewerage system, industrial waste and human excretor directly going into the lakes and rivers pollutes the water. Many germs thrive in this contaminated water and cause various diseases. The germs carrying typhoid, hepatitis, cholera, diarrhea, dysentery, skin diseases etc. Thrive in such contaminated water. Oh, I feel sick due to this. Sir, then what can we do with the waste water? We should not let the dirty water go waste. By removing contaminants from it, it can be made clean and reused again. Can so much dirty water be purified? Yes, dirty water is sanitized with the help of a water treatment plant. But why, sir? Will we not get sick from reusing this water? Due to the continuous scarcity of clean water, the dirty water is cleaned and reused. If we do not treat sewer generated in large quantities, this muddy water will pollute lakes, rivers and ground water without interruption. Therefore, water must be treated. How is this treatment done, sir? I will tell you about it tomorrow. It is now time. Remember, water is precious and we should understand the value of safe drinking water. Therefore, we should not waste water. Water should be used with caution. One should not waste be used with caution. Rakesh is right. See you tomorrow. Thank you, sir. Children, in this video you have learnt about waste water and its different aspects. Many diseases are spread due to water pollution. That is why dirty water should not be mixed with clean water. In the next video, you will learn about the process of cleaning waste water. See you. Thank you.