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प्रश्न
What is sludge?
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उत्तर
- Semi-solids such as faeces that settle down during wastewater treatment are called sludge.
- This sludge is removed using a scraper and then transferred to a tank where it is decomposed by anaerobic bacteria to produce biogas.
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संबंधित प्रश्न
Dried ______ is used as manure.
Drains get blocked by ______ and ______.
Describe the steps involved in getting clarified water from wastewater.
Explain how sludge is treated.
Explain the function of bar screens in a wastewater treatment plant.
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.
Sewage is a solid waste which causes water pollution and soil pollution
Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.
- Sludge is scraped out and skimmer removes the floating grease.
- Water is made to settle in a large tank with a slope in the middle.
- Large objects like plastic bags are removed by passing wastewater through bar screens.
- Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
- Wastewater enters a grit and sand removal tank.
Three statements are provided here which define the terms –
- sludge
- sewage and
- wastewater.
Pick out the correct definition for each of these terms.
- The settled solids are removed in wastewater treatment with a scraper.
- Water from the kitchen is used for washing dishes.
- Wastewater is released from homes, industries, hospitals and other public buildings.
