Tag: bioenergy

Questions Related to bioenergy

Producer gas differs from biogas in having

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Methane

  2. Carbon monoxide

  3. $CO _2$

  4. Formed by fermentation

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Correct Option: B

Methanogens converts

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Methyl alcohol into methane

  2. Formic acid into methane

  3. Acetic acid into methane

  4. All of the above

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Correct Option: D

Biogas production is

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Single step aerobic process

  2. Two step aerobic process

  3. Three step aerobic process

  4. Three step anaerobic process

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Correct Option: D

Anaerobic sludge digesters and inoculums are part and parcel of _____________.

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Primary sluge

  2. Activated sludge

  3. BOD

  4. FIocs

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Correct Option: A
Explanation:

Anaerobic digestion is a collection of a process by which microorganism break down biodegradable material in the absence of oxygen and some of these processes are used in the waste Industries to manage the waste. Primary sludge is a result of the capture of suspended solids and organics materials. In the primary process of waste management, the material is treated in a variety of ways. During the biological treatment of the waste a part of activated sludge is used as inoculum and they are passed into the last tank which is known as anaerobic sludge digester. The microorganism present in the sludge gets killed.


So, the correct option is 'Primary sludge'.

Which of the following is correct about biogas?

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Methane gas is produced along with ethyl alcohol by methanogen

  2. Methanogens acts on cellulose and release biogas

  3. Biogas is produced by thunder and lightening

  4. Maximum gas found in biogas is $CO _2$

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Correct Option: B
Explanation:
  • Methanogens are present in the rumen of cattle that is present in dung as well. Methanogens acts on the cellulose content of the and  It helps in the production of methane gas that is a component of biogas.
  • Hence Methanogens acts on cellulose and release biogas is a correct statement.
  • So, the correct answer is 'Methanogens acts on cellulose and release biogas'.

Biogas production is rate limited by

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Production of methane

  2. Cellulose digestion

  3. Conversion of monomers to organic acids

  4. None of the above

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Correct Option: B

Temperature suitable for biogas production is

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. $35^o-40^o$C

  2. $20^o-25^o$C

  3. $30^o-35^o$C

  4. $40^o-44^o$C

Show answer
Correct Option: A
Explanation:
Biogas production occurs by the action of anaerobic bacteria on waste materials or raw materials. The reactions are made to occur in specially designed large sized tanks called digesters. The bacteria that decompose  the raw materials and produce biogas can be thermophilic if they survive at a higher temperature or mesophilic if they survive at a moderate temperature. Mesophilic bacteria are active at an optimum temperature of 35° - 40°C and thermophilic bacteria are active at an optimum temperature of 50° - 55°C . 
Hence, option A matches the correct temperature suitable for biogas production.
So, the correct answer is '35° - 40°C'.

The process that provides both energy and manure is

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Burning of fuel wood

  2. Pyrolysis of wood

  3. Gasification of wood and wood shavings

  4. Biogas formation

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Correct Option: D

The technology of biogas production was developed in India through the efforts of

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. KVIC

  2. IARI

  3. Both A and B

  4. WHO

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Correct Option: C

A peculiar odour that occurs in marshy areas and cowsheds is due to gas produced by.

zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

  1. Cyanobacteria

  2. Archaebacteria

  3. Mycoplasma

  4. Slime Moulds

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Correct Option: B
Explanation:

The odour is due to the gases produced  by the bacteria Methanogens which belong to Archaebacteria.

Correct answer-B