The liquid effluent from an industry contains glutamic acid, $C_5{H}_9{O}_{4}N.$ The con$-$

centration is $1,5k\frac{g}{m^3},$ the effluent volume is $300\frac{m^3}{d}.$

a$)$ What is the total oxygen demand of the effluent?

b$)$ How much oxygen should be added per day to the biological treatment plant

assuming that $70\%$ of the organic matter in the effluent is oxidized and that the

plant does not nitrify?

c$)$ How much oxygen should be added per day to the biological treatment plant

assuming that $90\%$ of the organic matter in the effluent is oxidized and that the

plant nitrifies?