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प्रश्न
Which of the following is/are products of wastewater treatment?
विकल्प
Biogas
Sludge
Both biogas and sludge
Aerator
उत्तर
Both biogas and sludge
Explanation:
The sewage is treated to destroy the germs and reduce the contaminants. In wastewater treatment, wastewater is passed through a sedimentation tank, in which organic materials settle down and are removed with a scraper. This is called sludge. In a separate tank, sludge is acted upon by anaerobic bacteria which produces methane, carbon dioxide, and biogas by a process known as digestion. Therefore, both sludge and biogas are products of wastewater treatment.
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संबंधित प्रश्न
Explain how sludge is treated.
Name two chemicals used to disinfect water.
Explain the function of bar screens in a wastewater treatment plant.
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?
Sewage is mainly a
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.
Where underground sewerage systems and refuse disposal systems are not available, the high-cost on-site sanitation system can be adopted.
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.
What is sludge?
