FE Civil Exam Prep 80, BOD, COD, DO Sag, Streeter-Phelps

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The key difference between BOD (Biochemical Oxygen Demand) and COD (Chemical Oxygen Demand) for exam purposes. - How to conceptually understand the Dissolved Oxygen (DO) sag curve resulting from wastewater discharge. - The roles of the deoxygenation (k_d) and reaeration (k_r) rates in the Streeter-Phelps equation. - How to correctly calculate the initial oxygen deficit (D₀), a common source of error on the exam. - A mnemonic to distinguish between the two primary rate constants in the DO sag model. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep