Statement (I): Aerobic condition in composting of refuse can be c
Statement (I): Aerobic condition in composting of refuse can be confirmed by temperature measurements.
Statement (II): Aerobic reactions are exothermic.A. Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
B. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)
C. Statement (I) is true but Statement (II) is false
D. Statement (I) is false but Statement (II) is true (II) is true:
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Statement II -True
Any reaction which release heat called exothermic and which absorbs heat called endothermic.
Aerobic composting is decomposition of organic matter using microorganisms that require oxygen. Oxygen from the air diffuses in to the moisture and is taken up by the microbes living in soil. As aerobic digestion takes place the by-products are heat, water and carbon dioxide (CO2).
Aerobic compositing release heat, therefore it is exothermic.
The heat produced in aerobic composting is sufficient to kill harmful bacteria and pathogens. It also helps support the growth of beneficial bacteria species which thrive at the higher temperature levels.
Statement I - True
The process of composting involves two temperature ranges: Mesospheric and Thermophilic. While the ideal temperature for the initial composting stage is 20-45 °C, at subsequent stages with the Thermophilic organisms taking over, a temperature reaches to 50-70 °C .Therefore, high temperatures characterize the aerobic composting process and indicates vigorous microbial activities.