Question

describe an activity to show the process that take place at the water treatment plant​

Answer 1

Answer:

Explanation:

WWTP)

Treatment of wastewater involves physical, chemical, and biological processes, which remove physical, chemical and biological matter that contaminates the wastewater.

1. Wastewater is passed through bar screens. Large objects like rags, sticks, cans, plastic packets, napkins are removed (Fig. 18.3).

2. Water then goes to a grit and sand removal tank. The speed of the incoming wastewater is decreased to allow sand, grit and pebbles to settle down (Fig. 18.4).

3. The water is then allowed to settle in a large tank which is sloped towards the middle. Solids like faeces settle at the bottom and are removed with a scraper. This is the sludge. A skimmer removes the floatable solids like oil and grease. Water so cleared is called clarified water (Fig. 18.5).

The sludge is transferred to a separate tank where it is decomposed by the anaerobic bacteria. The biogas produced in the process can be used as fuel or can be used to produce electricity.

4. 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 (Fig. 18.6). After several hours, the suspended microbes settle at the bottom of the tank as activated sludge. The water is then removed from the top.

The activated sludge is about 97% water. The water is removed by sand drying beds or machines. Dried sludge is used as manure, returning organic matter and nutrients to the soil. The treated water has a very low level of organic material and suspended matter. It is discharged into a sea, a river or into the ground. Nature cleans it up further. Sometimes it may be necessary to disinfect water with chemicals like chlorine and ozone before releasing it into the distribution system.

Become an active citizen

Waste generation is a natural part of human activity. But we can limit the type of waste and quantity of waste produced. Often we have been repelled by offensive smell. The sight of open drains is disgusting. The situation

Answer 2

The materials like funnel, filter paper, cheeze cloth, meshes of different sizes must be collected.

Explanation:

• The funnel must be covered with the filter paper to allow the waste water to flow through the device.
• The water reaches to the different levels of the wire mesh that allows the different sizes of the sediments, concrete and stones to get caught up.
• The bottom of the filter system consists of a fine mesh which traps the fine sediments.
• The cheeze cloth is kept at the bottom which allows the absorption of mud.
• The water can be found clean to an appreciable extend can be found at the end of the process.

Learn more about water treatment plant:

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