The concentration of suspended solids in an aeration tank is 2500 mg/L. The flow rate from a primary clarifier into the aeration tank is 3,600,000 gpd. The concentration of suspended solids in this flow rate is 2000 mg/L. The aeration tank is also fed with returned activated sludge with a concentration of suspended solids of 9000 mg/L. The flow rate of the returned sludge is most nearly (A) 200,000 gpd (B) 260,000 gpd (C) 280,000 gpd (D) 1,400,000 gpd
The concentration of suspended solids in an aeration tank is 2500 mg/L. The flow rate from a primary clarifier into the aeration tank is 3,600,000 gpd. The concentration of suspended solids in this flow rate is 2000 mg/L. The aeration tank is also fed with returned activated sludge with a concentration of suspended solids of 9000 mg/L. The flow rate of the returned sludge is most nearly (A) 200,000 gpd (B) 260,000 gpd (C) 280,000 gpd (D) 1,400,000 gpd
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Transcribed Image Text:The concentration of suspended solids in an aeration tank is 2500 mg/L. The flow rate from a
primary clarifier into the aeration tank is 3,600,000 gpd. The concentration of suspended solids
in this flow rate is 2000 mg/L. The aeration tank is also fed with returned activated sludge with a
concentration of suspended solids of 9000 mg/L. The flow rate of the returned sludge is most
nearly
(A) 200,000 gpd
(B) 260,000 gpd
(C) 280,000 gpd
(D) 1,400,000 gpd
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