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Activated sludge acts as the inoculum for primary sewage treatment.

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Important Questions on Microbes in Human Welfare

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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. 
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Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Write a brief note on biochemical oxygen demand.
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Describe the role of Microbes in sewage treatment plant.
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Bhuvan wants to manufacture protein food supplements in his industry by using sewage and industrial wastewater. Suggest the name of the microbe and the components of the wastewater that can be used in his industry.
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Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Two bottles were half-filled with water from Ganga (P) and Kaveri (Q) and kept under identical airtight conditions for 5 days. The oxygen was determined to be 2% in the bottle (P) and 10% in the bottle (Q). What could be the cause of this difference?
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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
Which bacteria is commonly found in the anaerobic sludge during sewage treatment?
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which of the following in sewage treatment removes suspended solids?
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
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
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Give a brief account of septic tank systems in small scale sewage treatment processes. What is activated sludge?
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from
EASY
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
In STP the biological treatment is completed with the help of
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Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Differentiate between the primary and secondary treatment of sewage. 
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Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Choose the correct option, which shows correct sequence of substances obtained during sequential process of sewage treatment.
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
What gases are produced in anaerobic sludge digesters?
HARD
Biology>Biology in Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Describe the process of secondary treatment given to municipal wastewater (sewage) before it can be released into freshwater bodies. Mention another benefit provided by this process.
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 high value of BOD (Biochemical Oxygen Demand) indicates that: