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In: Civil Engineering

A domestic wastewater with a flow of 1700 m3 / day will be treated in a...

A domestic wastewater with a flow of 1700 m3 / day will be treated in a biological treatment plant. Wastewater pre-settling tank effluent BOD value is 350 mg / L. If the volume of the biological reactor (ventilation reactor) is 500 m3, do you prefer a fully mixed or plug-flow reactor? Please explain the reasons.

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Expert Solution

for both plug flow and completely mixed condition effluent concentration after biological treatment is same and the volume of reactor is fixed. hence we can choose the economical reactor. since completely mixed reactor uses external energy for mixing and plug flow doesn't need any energy, plug flow reactor is more economical than completely mixed reactor for the given conditions. hence choose plug flow reactor.

Ally Wells answered 1 month ago
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