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What is the unit of influent flow rate?(a) m d(b) m/d(c) m^2/d(d) m^3/dThe question was posed to me during an online exam.This interesting question is from Bioreactor Configurations topic in section Reactor Engineering of Bioprocess Engineering

Answer»

Right answer is (d) m^3/d

Easiest explanation: HRT also known as hydraulic residence TIME is a measure of the average length of time that a SOLUBLE compound REMAINS in a CONSTRUCTED bioreactor. Hydraulic retention time is the volume of the aeration tank divided by the INFLUENT flow rate:

where HRT is hydraulic retention time (d) and usually expressed in hours (or sometimes days), the V is the volume of aeration tank or reactor volume (m^3), and is the influent flow rate (m^3/d).



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