For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of $20^{\circ} \mathrm{C}\left(\mathrm{BOD}_{3 \mathrm{day}, 20^{\circ} \mathrm{C}}\right)$ is estimated as $200 \mathrm{mg} / \mathrm{L}$. Taking the value of the first order BOD reaction rate constant as 0.22 day $^{-1}$, the five-day BOD (expressed in $\mathrm{mg} / \mathrm{L}$ ) of the wastewater at incubation temperature of $20^{\circ} \mathrm{C}\left(\mathrm{BOD}_{\text {sday, } 20^{\circ} \mathrm{c}}\right)$ would be

For a wastewater sample, the three-day biochemical oxygen demand at incubation temperature of $20^{\circ} \mathrm{C}\left(\mathrm{BOD}_{3 \mathrm{day}, 20^{\circ} \mathrm{C}}\right)$ is estimated as $200 \mathrm{mg} / \mathrm{L}$. Taking the value of the first order BOD reaction rate constant as 0.22 day $^{-1}$, the five-day BOD (expressed in $\mathrm{mg} / \mathrm{L}$ ) of the wastewater at incubation temperature of $20^{\circ} \mathrm{C}\left(\mathrm{BOD}_{\text {sday, } 20^{\circ} \mathrm{c}}\right)$ would be

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