Treatment Plant Operator Exam Study Guide Answers

Given the following data: Analyzing BOD readings of raw influent 10 ml samples Initial DO reading sample 1: 8 mg/LFinal DO reading sample 1: 1.4 mg/LInitial DO reading sample 2: 8 mg/LFinal DO reading sample 2: 1.6 mg/L What is the average BOD reading for this sample? This is an unseeded BOD test. The answer to this question is B, 195 mg/L BOD. This can be solved using the BOD formula below. To perform the proper BOD analysis, prepare your sample and take the initial DO reading of each sample. Place the samples in a BOD incubator for five days (=/- four hours) at a temperature of 20 degrees C.