Dry waste A contains 2.16% carbon and 1.20% nitrogen;dry B contains 19.10% carbon and .14% nitrogen. Find kg B per kg A to obtain C:N=25,to two decimals.
Take1 kg A and x kg B. Carbon mass is $.0216+.191x$ kg, and nitrogen mass $.012+.0014x$ kg. Set $\frac{.0216+.191x}{.012+.0014x}=25$. Then $.156x=.2784$,so $x=1.7846154$,rounded **1.78 kg B/kg A**. Both streams are dry, so no moisture correction is required.
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