Mell Why solid food remains used tea leaves sanitary towels should not be thrown into drain explain?
Chemicals like paints, solvents, insecticides, motor oil and medicines may kill decomposer microbes that help purify water. So, these must never be thrown down the drain. Used tea leaves, solid food remains, soft toys, cotton, napkins etc. This hampers the degradation process of the garbage by microorganisms.
Why should we not throw used leaves into sink?
Answer : (a) We should not throw used tea leaves into sink as it chokes the drain and do not allow free flow of oxygen which hampers the degradation process. In an open drain, this oil and fats clog the pores of the soil and reduce the effectiveness of soil in filtering water.
Why cotton and tea leaves should not be thrown down the drain?
Throwing substances such as cotton, used tea leaves and leftover food in the drains should not be done. These activities choke the drains and kill the microbes.
Why should we not throw 2 marks a used tea leaves into sink?
(a) We should not throw used tea leaves into sink because it may choke the drain-pipe of the sink and do not allow the free fall of waste water through them. And in an open drain, the fats clog the soil pores reducing its effectiveness in filtering water.
Why should oils and fats not be released in the drain?
Explain. Solution: Oils and fats are not released in the drain because oil is not dissolved in water and it floats on water. It can clog the drains and can affect aquatic life if released in the water body.
What is class 7 clarified?
Water is then allowed to settle in a tank where solids like faeces (called sludge) settle at the bottom and are removed with a scraper. Water so cleared is called clarified water. Sludge is used to produce biogas. Clarified water is then passed through an aerator tank where air is pumped into the water.
Do tea leaves block drains?
Food Waste and Substances Food and substances that do not break down such as coffee grounds, grease, and tea leaves will build up in your pipes and create a clog in your drain over time. If you have a compost bin scrape off any food material before washing your dishes.
Why should we not throw used tea leaves into sink Class 7?
Answer: a) we should not throw used tea leaves in the kitchen sink because they reduce the process of degradation by hindering the flow of oxygen. we should not throw oil and grease in the sink because dehardun after sometime if thrown into drain.
Why are open drains a concern?
Answer: Open drains are concern because they can cause disease which will be very dangerous and harmful for human life. because there some unknown bacteria will be taking birth which will be very much dangerous for if do not know the prevention.
Why should Chemicals not be released in the drain?
Chemicals like paints, solvents, insecticides should not be thrown down the drain as it may kill the useful microbes that help to decompose the wastes present in the sewage and purify water.
What is sludge how it is treated?
The residue that accumulates in sewage treatment plants is called sludge (or biosolids). Digested sludge is passed through a dewatering step; the dried solids are disposed of, and the water is sent back to secondary treatment.
What cleans clarified water?
Aerator. Air is pumped into the clarified water to help aerobic bacteria to grow. Bacteria consume human waste, food waste, soaps and other unwanted matter still remaining in clarified water . After several hours, the suspended microbes settle at the bottom of the tank as activated sludge.
Why should we not throw used tea leaves into sink?
(a) Used tea leaves may choke the drain-pipe of the sink. (b) Cooking oil and fats can harden and block the pipes. Please log inor registerto add a comment.
What should you not throw down a drain?
In an open drain, the fats clog the soil pores reducing its effectiveness in filtering water. They should not be thrown down the drain. Throw oil and fats in the dustbin. Chemicals like paints, solvents, insecticides, motor oil, medicines kill microbes which purify water.
Why does a sewage treatment plant block a drain?
This is because if these wastes are thrown in piped drains carrying wastewater, they block the drains (or choke the drains), and do not allow free flow of wastewater through them. By blocking the drains, these wastes also do not allow free flow of oxygen (of air) to the useful microbes in the drain which help to decompose the wastes.
What kind of waste should be thrown in the dustbin?
Solid waste like used tea leaves, solid food remains, soft toys, cotton, sanitary towels, etc. should also be thrown in the dustbin. This kind of wastes chokes the drains. They do not allow free flow of oxygen and thus hampers the degradation process.