Waste water management Worksheet-4

Waste water management Worksheet-4

Fill in the blanks:

1. The material that settles at the bottom is referred to as sludge and the material that rises to the top as ____.
2. Solid waste that settles at the bottom in the primary treatment of wastewater is called the ____.
3. A process used for treating sludge, in which the sludge is burnt into ashes is called ____.

True False:

1. A wastewater treatment plant is a facility that treats wastewater from industrial sources only.
2. Leakages in several places in the main water supply line cause drinking water to get mixed with sewerage water and water gets contaminated.
3. Water containing faeces, paper, cloth, soap, detergent, oil, grease, food scrap, etc. carried out of our houses through sewers or drains is called treated water.
4. Water pollution can be caused as a result of the discharge of untreated or partly treated sewage in water bodies, sometimes due to improper sewage handling processes of municipal bodies.
5. A channel system of pipelines, known as the sewage system, carries sewage out of our homes to treatment plants.
6. There are two ways of treating sludge; namely incinerating, and composting.
7. People consuming contaminated water may suffer from diseases like malaria, asthma, and bronchitis.
8. Used water is also called as wastewater.
9. Eutrophic lakes are very deep and lack nutrients.

Answer key

Fill in the blanks:

1. scum
2. Sludge
3. Incineration

True False:

1. F
2. T
3. F
4. T
5. T
6. F
7. F
8. T
9. F