The GATE Grind

GATE 2023 CE (CE1) – Question 28

Air Pollution and Municipal Solid Wastes · Municipal solid wastes: generation, collection, transportation and management · 1 mark · Multiple select

Which of the following statements is/are TRUE for the Refuse-Derived Fuel (RDF) in the context of Municipal Solid Waste (MSW) management?

  1. Higher Heating Value (HHV) of the unprocessed MSW is higher than the HHV of RDF processed from the same MSW
  2. RDF can be made in the powdered form
  3. Inorganic fraction of MSW is mostly converted to RDF
  4. RDF cannot be used in conjunction with oil

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Show answer and explanation

Correct answer: (B) RDF can be made in the powdered form

Explanation

RDF is made by removing the non-combustible and wet fractions, so its heating value is higher than that of the raw MSW (A false). It can be shredded, pelletised or pulverised to a powder (B true). The inorganic fraction (metals, glass) is removed, not converted (C false). RDF can be co-fired with oil or coal (D false).