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प्रश्न
Ganga has recently been declared the national river. Discuss the implication with respect to pollution of this river.
उत्तर
The Ganga is the largest river in India with an extraordinary religious ‘ importance for Hindus. Situated along its banks are some of the world’s oldest inhabited cities like Varanasi and Patna. It provides water to about 40% of India’s population across 11 states, serving an estimated population of 500 million people or more, which is larger than any other river in the world.
A number of initiatives have been undertaken to clean the river but failed to deliver desired results. After getting elected, India’s Prime minister Narendra Modi affirmed to work for cleaning the river and controlling pollution. Subsequently, Namami Ganga project was announced by the Government in July 2014 budget. An estimated Rs 2,958 crores have been spent till July 2016 in various efforts to clean up the river.
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संबंधित प्रश्न
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20mg/L, 8mg/L and 400mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each assuming the river water is relatively clean?
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
Name the chamber in which the suspended objects are filtered and removed during sewage treatment?
Identify the type of microorganisms involved in floe formation during sewage treatment.
After which of the following treatment BOD of the effluent is significantly reduced?
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
BOD of waste water is estimated by measuring the amount of ______.
What would happen if oxygen availability to activated sludge flocs is reduced?
Activated sludge should have the ability to settle quickly so that it can ______.
In what way anaerobic sludge digestion is important in sewage treatments?