Discussion
Consider the following pairs of by-product and the property that makes it valuable:
Rice husk ash - Amorphous silica content
Oilseed cake - Protein content
Wheat bran - Dietary fibre content
Bagasse - High protein content
How many of the pairs given above are correctly matched?
Answer: B
Correct answer: Only three
Three pairs are right. Rice husk ash is valuable for its amorphous silica, oilseed cake for its protein, and wheat bran for its dietary fibre.
The fourth is wrong. Bagasse is almost entirely lignocellulosic fibre with very little protein, which is why it is burnt or made into board rather than fed. Its value lies in its bulk and its energy content, and in the fact that it arises at the mill in exactly the quantity the mill's boilers can use.
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