EASY
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The second step or secondary treatment in the treatment of industrial and municipal waste waters is also called process.

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Important Questions on Microbes in Human Welfare

HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Explain in brief the biogas production process with the help of a labelled figure.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment

The below diagram represents a typical biogas plant. Select the correct option for A, B and C respectively?

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EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
What is biogas? Name any two main constituents of biogas.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Explain the biogas plant with a neat labelled diagram.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The microorganisms involved in floc formation during sewage treatment are
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Define bioreactor. 
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Sewage water can be purified by:
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Draw a labelled diagram of typical biogas plant.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Biogas is the __________ source of energy.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The technology of biogas production was developed in India due to the efforts of:
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Describe the role of Microbes in sewage treatment plant.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
What gases are produced in anaerobic sludge digesters?
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
What is sewage? Write a note on the secondary or biological treatment of sewage. 
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which bacteria is commonly found in the anaerobic sludge during sewage treatment?
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Differentiate between the primary and secondary treatment of sewage. 
MEDIUM
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
When students visited sewage treatment plants in their city, they observed large airtight tanks with huge pipelines to collect the released gases so as to generate electricity. As a student of Biology, explain the formation and composition of these gases in the tanks.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
What is flocs?
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Study the following statements and select the incorrect ones?
(i) Physical removal of large and small particles through filtration and sedimentation is called primary sewage treatment
(ii) Secondary sewage treatment is mainly a mechanical process
(iii) Activated sludge sediment in s sewage treatment plant is a rich source of aerobic bacteria
(iv) Biogas, commonly called as gobar gas, is pure methane
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
In sewage treatment, secondary treatment is considered highly significant, because
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which of the following in sewage treatment removes suspended solids?