A CBOD test is set up with a dilution factor of 40. The DO of the sample brought from the field was 0.5 mg/L; while the DO of the dilution water was 8.2 mg/L. (The sample does not require special dilution water with nutrients). The BOD bottle is incubated in the dark at 20°C. The DOs (after five days of incubation) is measured as 4 mg/L and the DO30 (after 30 days of incubation) = 2.0 mg/L Determine the ultimate CBOD and the deoxygenation rate constant (k20) for the original sample brought from the field. (Assumption: in domestic wastewaters, beyond 25 days of incubation, the DO demand in a BOD bottle is considered complete and no more DO demand is exerted in the bottle).
A CBOD test is set up with a dilution factor of 40. The DO of the sample brought from the field was 0.5 mg/L; while the DO of the dilution water was 8.2 mg/L. (The sample does not require special dilution water with nutrients). The BOD bottle is incubated in the dark at 20°C. The DOs (after five days of incubation) is measured as 4 mg/L and the DO30 (after 30 days of incubation) = 2.0 mg/L Determine the ultimate CBOD and the deoxygenation rate constant (k20) for the original sample brought from the field. (Assumption: in domestic wastewaters, beyond 25 days of incubation, the DO demand in a BOD bottle is considered complete and no more DO demand is exerted in the bottle).
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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