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Anaerobic digestion of agro-processing waste yields

  • A.Ethanol
  • B.Pectin
  • C.Biogas and a digested slurry
  • D.Producer gas

Answer: C

Roughly fifty-five to sixty-five per cent of the biogas is methane, and the digestate remains a useful fertiliser. Wet residues suit digestion far better than combustion, since drying them would consume more energy than they contain.

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