CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The domestic sewage in large cities


A
Is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
loader
B
When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen
loader
C
Has very high amounts of suspended solids and dissolved salts
loader
D
Has a high BOD as it contains both aerobic and anaerobic bacteria
loader

Solution

The correct option is A Is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
The municipal wastewater is called as Sewage. It contains a large amount of organic matter and microbes. Before disposal, sewage is treated in Sewage Treatment Plants(STPs) to make it less polluted. The treatment is done in two stages:
1) Primary treatment
2) Secondary treatment or Biological treatment
It is processed by aerobic and then anaerobic bacteria in the secondary treatment in STPs.
The BOD is a measure of the rate of uptake of oxygen by microorganisms in a sample of water thus, Indirectly, BOD is a measure of organic matter present in the water.
So, the correct answer is 'Option A'.

Biology

Suggest Corrections
thumbs-up
 
0


similar_icon
Similar questions
View More


similar_icon
People also searched for
View More



footer-image