Dairy Unit Operations

Using Pearson's square to produce $100\text{ kg}$ of Standardized Milk with $4.5\%\text{ fat}$ by blending whole milk ($6.0\%\text{ fat}$) and skim milk ($0.5\%\text{ fat}$): Parts of whole milk $= 4.5 - 0.5 = 4.0$; Parts of skim milk $= 6.0 - 4.5 = 1.5$; Total parts $= 4.0 + 1.5 = 5.5$. Weight of whole milk required is $\frac{4.0}{5.5} \times 100$ in kg (rounded off to one decimal place):