1
Question
Read the following statements and choose the correct option:
Assertion: Biogas plants are mostly situated in rural areas.
Reason: Biogas is produced by the action of aerobic decomposers on a slurry of cow dung and water.
Read the following statements and choose the correct option:
Assertion: Biogas plants are mostly situated in rural areas.
Reason: Biogas is produced by the action of aerobic decomposers on a slurry of cow dung and water.
Open in App
Solution
The correct option is C Only assertion is true.
Biogas is a combustible mixture of gases like methane and carbon dioxide which can act as an eco-friendly fuel for tthe purpose of cooking and lighting. It is produced due to the anaerobic breakdown of organic wastes by methanogenic bacteria.
The most commonly used raw materials for biogas production are - slurry of cowdung and water, agricultural farm refuse, night soil (human excreta collected in buckets at night). As these materials are more readily available in rural areas, biogas plants are mostly situated in rural areas.
The complex organic compounds (polymers) in the wastes are initially broken down anaerobically by decomposers to form simpler monomeric products by the process of hydrolysis.
The monomers are further fermented by decomposers to form organic acids by the process of acidogenesis. Acetogenesis is one of the substeps of acidogenesis in which the monomeric carbohydrates are converted to acetic acid which can act as a substrate for methane production.
The end products of the decomposition reaction are finally anaerobically reduced by methanogens to produce a mixture of carbon dioxide and methane which is known as biogas.
Methanogens are anaerobic bacteria which can respire and survive only in the absence of oxygen.They produce energy in the body by reducing carbon dioxide/organic acids to methane in the presence of hydrogen.
Thus, only the assertion is true as there are no aerobic bacteria involved in the process.
Biogas is a combustible mixture of gases like methane and carbon dioxide which can act as an eco-friendly fuel for tthe purpose of cooking and lighting. It is produced due to the anaerobic breakdown of organic wastes by methanogenic bacteria.
The most commonly used raw materials for biogas production are - slurry of cowdung and water, agricultural farm refuse, night soil (human excreta collected in buckets at night). As these materials are more readily available in rural areas, biogas plants are mostly situated in rural areas.
The complex organic compounds (polymers) in the wastes are initially broken down anaerobically by decomposers to form simpler monomeric products by the process of hydrolysis.
The monomers are further fermented by decomposers to form organic acids by the process of acidogenesis. Acetogenesis is one of the substeps of acidogenesis in which the monomeric carbohydrates are converted to acetic acid which can act as a substrate for methane production.
The end products of the decomposition reaction are finally anaerobically reduced by methanogens to produce a mixture of carbon dioxide and methane which is known as biogas.
Methanogens are anaerobic bacteria which can respire and survive only in the absence of oxygen.They produce energy in the body by reducing carbon dioxide/organic acids to methane in the presence of hydrogen.
Thus, only the assertion is true as there are no aerobic bacteria involved in the process.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
