Advertisements
Advertisements
प्रश्न
Explain how sludge is treated.
Advertisements
उत्तर
- In the clarifier (or sedimentation tank), sludge settles at the bottom and is collected using a scraper. It is then moved to a separate tank known as the digester, where it is digested by anaerobic microorganisms.
- The biogas created during the process can be utilized for fuel or to generate electricity. The clarified water from the sedimentation tank is pumped into the aeration tank. In the aeration tank, suspended microorganisms sink to the bottom as activated sludge.
- The activated sludge is approximately 97% water. Water is removed using sand-drying beds or machinery. Dried sludge is utilized as manure, reintroducing organic matter and nutrients into the soil.
APPEARS IN
संबंधित प्रश्न
Drains get blocked by ______ and ______.
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?
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
State whether the following statement is True or False. In case a statement is false, write the correct statement.
Wastewater could be reused
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.
What is sludge?
