AIPMT MAINS2012Botany-Environmental Issues
AIPMT MAINS 2012 Botany Sewage Treatment MCQ Question
Type: MCQ-conceptual-Medium-Class 12
The domestic sewage in large cities: (1) has a high BOD as it contains both aerobic and anaerobic bacteria (2) is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plants (STPs) (3) When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen. (4) has very high amounts of suspended solids and dissolved salts
A
1
B
2
C
3
D
4
Correct Answer
Option B
Detailed Explanation
In sewage treatment plants, the secondary treatment involves aerobic bacteria followed by anaerobic bacteria to effectively reduce the BOD and treat the sewage.
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