Multiple choice

Which of the following statements best defines the term 'composting'?

In our everyday life, a huge amount of wastes are disposed from different household activities. In addition, there are agricultural wastes, industrial wastes, sewages, dead animals, etc. There are some other ways of disposing these wastes.

  1. The wastes are burned and reduced to small particles by rubbing on scattered surface in refractory-lined machinery.

  2. In this method, different processes are used like shredding, magnetic isolation of metals, air differentiation, etc.

  3. The disposal is distributed over the selected land in a thin layer and then bulldozer is used to make it compact.

  4. This method involves the preparation of wastes and decomposing the organic solid wastes by aerobic microorganisms.

  5. This is the combination of two sub processes; combustion and pyrolysis.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This method involves the preparation of wastes and decomposing the organic solid wastes by aerobic microorganisms. Waste is prearranged in order to isolate the materials, which can ot be composted so that the degradation process can be done more efficiently. Then these wastes are deposited in machinery in order to produce humus by biological degradation, which contains nitrogen, phosphorus, and potassium. After 3 weeks, the end products are treated mixed with additives and then it is ready for marketing.

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