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Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municiple waste waters into natural surface waters, is
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Important Questions on Enhancement of Food Production
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The below diagram represents a typical biogas plant. Select the correct option for A, B and C respectively?
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Biogas is the __________ source of energy.
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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
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Which bacteria is commonly found in the anaerobic sludge during sewage treatment?
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Which of the following in sewage treatment removes suspended solids?
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What is biogas? Name any two main constituents of biogas.
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The technology of biogas production was developed in India due to the efforts of:
MEDIUM
What is sewage? Write a note on the secondary or biological treatment of sewage.
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What gases are produced in anaerobic sludge digesters?
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In sewage treatment, secondary treatment is considered highly significant, because
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Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from
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Explain the biogas plant with a neat labelled diagram.
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Sewage water can be purified by:
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Describe the role of Microbes in sewage treatment plant.
MEDIUM
Draw a labelled diagram of typical biogas plant.
MEDIUM
Differentiate between the primary and secondary treatment of sewage.
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The microorganisms involved in floc formation during sewage treatment are
HARD
Explain in brief the biogas production process with the help of a labelled figure.
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The high value of BOD (Biochemical Oxygen Demand) indicates that:
