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A wastewater sample with a DO content of 1.4 mg/L is diluted with deionized water with a DO content of 8.8 mg/L in a 300 mL BOD bottle. The DO content of the diluted sample during a BOD test at 25 °C is 7.8 mg/L initially, 3.2 mg/L after 7 days, and 1.5 mg/L after an indefinitely long period of time. (a) Determine the volume of the undiluted wastewater sample used. (b) Determine the BODs of the undiluted wastewater sample if a test is conducted at 20 °C.

A wastewater sample with a DO content of 1.4 mg/L is diluted with deionized water with a DO content of 8.8 mg/L in a 300 mL BOD bottle. The DO content of the diluted sample during a BOD test at 25 °C is 7.8 mg/L initially, 3.2 mg/L after 7 days, and 1.5 mg/L after an indefinitely long period of time. (a) Determine the volume of the undiluted wastewater sample used. (b) Determine the BODs of the undiluted wastewater sample if a test is conducted at 20 °C.

Introduction to Chemical Engineering Thermodynamics
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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A wastewater sample with a DO content of 1.4 mg/L is diluted with deionized water with a DO content of 8.8 mg/L in a 300 mL BOD bottle. The DO content of the diluted sample during a BOD test at 25 °C is 7.8 mg/L initially, 3.2 mg/L after 7 days, and 1.5 mg/L after an indefinitely long period of time. (a) Determine the volume of the undiluted wastewater sample used. (b) Determine the BODs of the undiluted wastewater sample if a test is conducted at 20 °C.
Transcribed Image Text:A wastewater sample with a DO content of 1.4 mg/L is diluted with deionized water with a DO content of 8.8 mg/L in a 300 mL BOD bottle. The DO content of the diluted sample during a BOD test at 25 °C is 7.8 mg/L initially, 3.2 mg/L after 7 days, and 1.5 mg/L after an indefinitely long period of time. (a) Determine the volume of the undiluted wastewater sample used. (b) Determine the BODs of the undiluted wastewater sample if a test is conducted at 20 °C.
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