For a completely mixed activated sludge reactor treating municipal wastewater, we can assume the following kinetic and operating parameters:Maximum specific growth rate (μmax) = 3 day-1Yield = 0.6 mass cells/mass BOD5 utilizedHalf-velocity coefficient (KS) = 200 mg/LDecay coefficient (KD) = 0.06 day-1Influent substrate concentration (S0) = 400 mg/LMCRT = 5 daysReactor volume = 3 ML (million liters)Wastewater flow rate (Q) = 10 MLD (million liters per day)Returned activated sludge flow rate (QR) = 5 MLDCalculate the substrate concentration in the effluent (S), cell concentration in the reactor (X), sludge production rate (QWXW), hydraulic retention time (θH), waste sludge flow rate (QW), F/M ratio, and clarifier size.

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Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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For a completely mixed activated sludge reactor treating municipal wastewater, we can assume the following kinetic and operating parameters:

Maximum specific growth rate (μ_max) = 3 day^-1
Yield = 0.6 mass cells/mass BOD₅ utilized
Half-velocity coefficient (K_S) = 200 mg/L
Decay coefficient (K_D) = 0.06 day^-1
Influent substrate concentration (S₀) = 400 mg/L
MCRT = 5 days
Reactor volume = 3 ML (million liters)
Wastewater flow rate (Q) = 10 MLD (million liters per day)
Returned activated sludge flow rate (Q_R) = 5 MLD

Calculate the substrate concentration in the effluent (S), cell concentration in the reactor (X), sludge production rate (Q_WX_W), hydraulic retention time (θ_H), waste sludge flow rate (Q_W), F/M ratio, and clarifier size.

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