Tag: wastewater story

Questions Related to wastewater story

Low 'pH' of a sewage indicates its

biology wastewater story origin of waste products waste generation waste and its types

  1. Septic Conditions

  2. Decomposition

  3. Inorganic solids

  4. Organic matters

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Correct Option: A

Which bacteria flourish in absence of free dissolved oxygen in sewage?

biology wastewater story origin of waste products waste generation waste and its types

  1. Anaerobic Bacteria

  2. Aerobic Bacteria

  3. Rotifers

  4. Blue green algae

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Correct Option: A

Which solids remain floating in sewage?

biology wastewater story origin of waste products waste generation waste and its types

  1. Suspended solids

  2. Colloidal Solids

  3. Dissolved solids

  4. Settatleable solids

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Correct Option: A

'Turbidity' in sewage is caused by

biology wastewater story origin of waste products waste generation waste and its types

  1. Colloidal liquids

  2. Suspended and Colloidal Solids

  3. Chemicals

  4. Waste water

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Correct Option: B

'turbidity' increases as long as sewage becomes

biology wastewater story origin of waste products waste generation waste and its types

  1. Weak

  2. Strong

  3. Wide

  4. High

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Correct Option: B

The liquid waste which has dissolved and suspended impurities is

biology wastewater story origin of waste products waste generation waste and its types

  1. Sludge

  2. Sewage water

  3. Potable water

  4. None of the above

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Correct Option: B

Why is it necessary to set up the sewage treatment plants?

biology wastewater story origin of waste products waste generation waste and its types

  1. The health of the aquatic life is affected

  2. The waterbodies are getting polluted

  3. There is agricultural runoff contaminating the water

  4. Both A and B

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Correct Option: D

In domestic sewage, suspended solids, colloidal and dissolved materials constitute

biology wastewater story origin of waste products waste generation waste and its types

  1. $10\%$

  2. $5.6\%$

  3. $2.7\%$

  4. $0.1\%$

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Correct Option: D
Explanation:

The wastewater mixture will contain large numbers of microscopic organisms, mostly bacteria that are capable of consuming the organic component (fats, proteins, and carbohydrates) of the mixture and bringing about rapid changes in the wastewater. The solid components of wastewaters actually represent a very small part of most discharges, usually less than 0.1% by weight. However, it is this small component of the wastewater that presents the major challenges in wastewater treatment, operation, and disposal.

So the correct answer is '0.1%'.

The Residential and Commercial wastes mainly consist of:

biology wastewater story origin of waste products waste generation waste and its types

  1. Food wastes

  2. Card board

  3. Packaging materials

  4. None of the above

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Correct Option: C

Which one is both osmoregulator as well as nitrogenous waste ? 

biology wastewater story origin of waste products waste generation waste and its types

  1. Ammonia

  2. Urea

  3. Uric acid

  4. All of the above

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Correct Option: B