Answer any four :-
1. How is wastewater generated?
2. Outline your role as an active citizen in relation to sanitation?
3. Explain why it is harmful to discharge untreated sewage into the rivers or seas?
4. How can treated sewage be re-used/re-cycled?
5. List various steps involved in wastewater treatment plant?
Answers
Answer:
1. Wastewater is the polluted form of water generated from rainwater runoff and human activities. It is also called sewage. It is typically categorized by the manner in which it is generated—specifically, as domestic sewage, industrial sewage, or storm sewage (stormwater).
2. 1) Ensure that his surroundings (both inside and outside home) are clean. 2) Ensure that the sewerage system in his house is properly managed. 3) If he notices some leakage or other problem in the sewerage system, he should report it to the municipality.
4. Wastewater to be reused has to follow a certain sequence of treatment procedures to reduce concentration of pollutants in it. That might be traditional methods (waste separation, sedimentation), methods of removal of certain components (nitrogen and phosphorus), disinfection.
4. Treatment Steps
Step 1: Screening and Pumping. ...
Step 2: Grit Removal. ...
Step 3: Primary Settling. ...
Step 4: Aeration / Activated Sludge. ...
Step 5: Secondary Settling. ...
Step 6: Filtration. ...
Step 7: Disinfection. ...
Step 8: Oxygen Uptake.
Explanation:
hope it helps..mark me as BRAINLIEST please