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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

What would happen if oxygen availability to activated sludge flocs is reduced?

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प्रश्न

What would happen if oxygen availability to activated sludge flocs is reduced?

विकल्प

  • It will slow down the rate of degradation of organic matter.

  • The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.

  • Flocs would increase in size as anaerobic bacteria would grow around flocs.

  • Protozoa would grow in large numbers.

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उत्तर

The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.

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अध्याय 10: Microbes in Human Welfare - MULTIPLE CHOICE QUESTIONS [पृष्ठ ७१]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
अध्याय 10 Microbes in Human Welfare
MULTIPLE CHOICE QUESTIONS | Q 11. | पृष्ठ ७१

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Explain the function of “anaerobic sludge digester” in a sewage treatment plant.


Name the chamber in which the suspended objects are filtered and removed during sewage treatment?


Name the tank to which the sewage water is passed after the preliminary treatment?


The purpose of biological treatment of waste water is to ______.


In which of the following microbial digestion of organic wastes of sewage takes place?


In the process of biogas production which of the following anaerobic bacteria are used?


What happens during the course of sewage decomposition?


______ refers to the organic matter which settles down after physical treatment of sewage.


During tertiary treatment, the bacterial floes sediment in the sedimentation tank, this sediment is called ____________.


Study the following statements regarding tertiary treatment of sewage and choose the correct option.

i. It produces methane gas.

ii. The effluents formed from these plants undergo chlorination.

iii. BOD is significantly increased at this step.

iv. It includes screening and passage of effluent through grit chamber.


In the process of sewage treatment, the activated sludge is digested by ______


During sewage, treatment biogas is produced wits which include:


In which of the following step large and small particles are removed from sewage through sequential filtration and sedimentation?


Name the states involved in Ganga action plan.


Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.


Study the given diagram of the Sewage Treatment  Plant (S.T.P.) and answer the question that follows:

  1. Which one of the two 'S.T.P.' (A) or (B) will be more effective in treating the human excreta in municipal waste?
  2. Write the steps followed in carrying the treatment of the sewage in step (Z), once the BOD of sewage is reduced significantly till it is passed on to the "anaerobic sludge digesters".

Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.


Explain the steps involved in preliminary treatment of sewage.


Biochemical Oxygen Demand (BOD) serves as an indirect measure of which water quality parameter?


Which action plans were initiated by the Ministry of Environment and Forests to construct sewage treatment plants and protect major Indian rivers from pollution?


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