Engineering, 23.10.2019 23:00 nique0808
2. the concentration of ubod in a river entering the first of two lakes that are connected in series is equal to 20 mg/l. if the first-order bod reaction rate constant (k) equal to 0.35/d and complete mixing in each lake, what is the concentration of ubod at the outlet of each lake? the flow in the river is equal to 4000 m3/d and the volume of the first and second lake is 20,000 and 12,000 m3, respectively. assume steady-state conditions.
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