Tag: waste generation

Questions Related to waste generation

'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

Solids which remain dissolved in sewage is known as

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

  1. Settaleable Solids

  2. Colloidal Solids

  3. Suspended solids

  4. Dissolved Solids

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Correct Option: D

Which is the most common source of eutrophication?

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

  1. Industrial effluent

  2. Textile effluent

  3. Sewage water

  4. Both B and C

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Correct Option: C
Explanation:

Contamination of water reservoir with sewage water leads to increased level of phosphate in water. Due to increased level of phosphate algae starts growing on it. This decreases the dissolved oxygen level in water thus all the aquatic lives can't survive and leads to mortality. This is called eutrophication.

Find the odd one out:

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

  1. Electrodialysis

  2. Ion exchange chromatography

  3. Reverse osmosis

  4. Electrostatic precipitator

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Correct Option: D
Explanation:

Water gets contaminated due to industrial effluents, sewage water, radio biological pollutants etc. These can be purified by several techniques like electodialysis, Ion exchange chromatography, Reverse osmosis etc.

I. Sewage water treatment plants are setup for controlling water pollution.
II. BOD level increases after sewage treatment.

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

  1. I and II are true

  2. I and II are false

  3. I is true and II is false

  4. I is false and II is true

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Correct Option: C
Explanation:

Sewage treatment constitutes of 3 stages primary, secondary and tertiary. BOD i.e biological oxygen demand decreases during secondary stage. This makes water permissible to let into natural water resources.