Final answer:
The crude protein concentration of brewers grains on an as-fed basis is calculated by multiplying the crude protein on a dry matter basis (18%) by the dry matter concentration (93%), which results in 16.74%.
Step-by-step explanation:
To calculate the crude protein concentration of brewers grains on an as-fed basis, you need to account for the moisture content since the given protein concentration is on a dry matter basis. The as-fed basis includes the moisture in the brewers grains, while the dry matter basis refers to the nutrients in the feed after all the water has been removed.
The dry matter concentration of brewers grains is 93%. The crude protein concentration on a dry matter basis is given as 18%. To find the crude protein concentration on an as-fed basis, you multiply the crude protein percentage by the dry matter percentage.
As-fed crude protein concentration = (Crude protein on a dry matter basis) x (Dry matter concentration) = 0.18 x 0.93 = 0.1674 or 16.74%
Therefore, the crude protein concentration of brewers grains on an as-fed basis is 16.74%.