Study Guide Answer Key

Here are the answers to the Sept. 30, 2021 edition of TPO's Exam Study Guide: Solids Retention Time (SRT) is an important process control measure, what does it mean? The answer to the question is C, how long a suspended solids particle remains under aeration. Process control and process control math are very important measures the operator must understand to operate the plant efficiently. Solids Retention Time or SRT (synonymous with MCRT) is one of these controls. SRT is the measurement of how long a suspended solids particle remains under aeration and is measured as age. The formula for SRT is pounds of suspended