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प्रश्न
Sewage is mainly a
विकल्प
liquid waste
solid waste
gaseous waste
a mixture of solid and gas
उत्तर
liquid waste
Explanation:
Sewage is wastewater that includes domestic or industrial liquid wastes. It contains variously dissolved and suspended impurities.
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संबंधित प्रश्न
Explain how sludge is treated.
Name two chemicals used to disinfect water.
Study the following statements about ozone:
- It is essential for breathing of living organisms.
- It is used to disinfect water.
- It absorbs ultraviolet rays.
- Its proportion in air is about 3%.
Which of these statements are correct?
Which of the following is/are products of wastewater treatment?
The system of a network of pipes used for taking away wastewater from homes or public buildings to the treatment plant is known as
State whether the following statement is True or False. In case a statement is false, write the correct statement.
Used water is wastewater
State whether the following statement is True or False. In case a statement is false, write the correct statement.
Wastewater could be reused.
Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
(a) Sludge is scraped out and the skimmer removes the floating grease.
(b) Water is made to settle in a large tank with a slope in the middle.
(c) Large objects like plastic bags are removed by passing wastewater through bar screens.
(d) Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
(e) Wastewater enters a grit and sand removal tank.
Three statements are provided here which define the terms
(a) sludge
(b) sewage and
(c) wastewater.
Pick out the correct definition for each of these terms.
(a) The settled solids are removed in wastewater treatment with a scraper.
(b) Water from the kitchen is used for washing dishes.
(c) Wastewater is released from homes, industries, hospitals and other public buildings.
Describe various steps of cleaning wastewater in a wastewater treatment plant.
