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Measuring Biochemical Oxygen Demand (BOD) is a method used for

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Important Questions on Microbes in Human Welfare

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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The high value of BOD (Biochemical Oxygen Demand) indicates that:
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
An increase in the concentration of the toxicant at successive trophic levels is known as:
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
One of the following is called as 'Terror of Bengal'.
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Biology>Plants, Microbes and 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
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
A lake which is rich in organic waste may result in
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A river with an inflow of domestic sewage rich in organic waste may result in:
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The maximum concentration of harmful chemicals is expected to be found in organisms
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Sewage water can be purified by:
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which of the following in sewage treatment removes suspended solids?
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The biomagnification of which pollutant causes a decline in the bird population?
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
In sewage treatment, secondary treatment is considered highly significant, because
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
In an area where DDT has been used extensively, the population of birds declined significantly because -
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The highest DDT concentration in aquatic food chain shall occur in
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which ONE of the following can NOT cause eutrophication of lakes?
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which of the following is called the ‘Terror of Bengal’
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The minimum proportion of impurities that made the drinking water unfit for human consumption is____________
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Activated sludge have the ability to settle quickly so that it can:
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
The microorganisms involved in floc formation during sewage treatment are
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Biology>Plants, Microbes and Human Welfare>Microbes in Human Welfare>Microbes in Sewage Treatment
Which of the following is put into Anaerobic sludge digester for further sewage treatment?