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Structural Analysis
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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A design wastewater flow of 1.5 MGD containing 175 mg/L BOD (in the primary effluent) is to be treated in a single-stage moving bed biofilm reactor (MBBR), while the design SALR is used to be 25 g/m2 /d with a target BOD removal of 75-80%. a) What is the BOD loading rate to the reactor in g/day? b) If the MBBR carrier has a specific surface area of 600 m2 /m3 and design carrier fill % of 40%, what would be the required volume of carrier and required MBBR tank volume? c) If the design carrier % void space is 60%, what would be the volume of liquid in the MBBR reactor? d) Calculate the estimated effluent BOD concentration.
Transcribed Image Text:A design wastewater flow of 1.5 MGD containing 175 mg/L BOD (in the primary effluent) is to be treated in a single-stage moving bed biofilm reactor (MBBR), while the design SALR is used to be 25 g/m2 /d with a target BOD removal of 75-80%. a) What is the BOD loading rate to the reactor in g/day? b) If the MBBR carrier has a specific surface area of 600 m2 /m3 and design carrier fill % of 40%, what would be the required volume of carrier and required MBBR tank volume? c) If the design carrier % void space is 60%, what would be the volume of liquid in the MBBR reactor? d) Calculate the estimated effluent BOD concentration.
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