Discussion
Match each difficulty in List I with the residue it chiefly affects in List II.
List I
A. Very low bulk density
B. Rapid free fatty acid rise
C. Antinutritional factors
D. Very high moisture content
List II
1. Rice bran
2. Loose rice husk
3. Fruit and vegetable peel
4. Cottonseed and rapeseed cake
Select the correct match.
Answer: A
Correct answer: A-2, B-1, C-4, D-3
Each difficulty is matched to the residue it affects. Very low bulk density (A) afflicts loose rice husk (2), at around 100 kg/m\(^3\). A rapid rise in free fatty acids (B) afflicts rice bran (1), once milling releases lipase onto the oil.
Antinutritional factors (C) afflict cottonseed and rapeseed cake (4) - gossypol and glucosinolates. Very high moisture (D) afflicts fruit and vegetable peel (3), which is why those go to digestion rather than combustion.
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