Study Guide Answer Key

Here are the answers to the Oct. 8, 2020 edition of TPO's Exam Study Guide: 1. What type of trickling filter is best used for BOD reduction, but not for reporting purposes? The answer to this question is D. High-rate trickling filters are typically loaded at max organic loading capability. This rate may reach levels of 100 pounds/BOD/1,000 cubic feet. Due to high amounts of flow through this filter, some short circuiting and bleed-through is common, as these units are rarely used for strict discharge standards. High-rate trickling filters commonly use plastic media to account for the high hydraulic loading rates. Trickling filters are a