3. If the depletion of oxygen is found to be 2.5 mg/L after incubating 10 ml of sewage diluted to300 ml for 5 days at 20°C, The BOD of the sewage isaninteO50 mg/300 mg/150 mg75 mg

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Answered: the depletion of oxygen is found to be…

the depletion of oxygen is found to be 2.5 mg/L after incubating 00 ml for 5 days at 20°C, The BOD of the sewage is 50 mg 300 mg/ 150 mg 75 mg/

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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Determine the 5-day BOD for a wastewater sample when 15 ml of wastewater is diluted up to the mark in a 300mL BOD bottle with phosphate buffer. Initial concentration of dissolved O2 = 15 mg/L; Concentration of dissolved O2 on Day 5 = 5 mg/L. BOD5 = (D1 - D5)/p 0.033 mg/L 0.67 mg/L 200 mg/L 100 mg/L
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