Welcome back to TPO magazine's Exam Study Guide Series, which offers a pair of water/wastewater study questions with in-depth explanations of the answers. Last time, we covered a set of wastewater and drinking water treatment questions on the topics of Low-Flow Dosing Rates; and Thermally Stratified Lakes. This time you can test your knowledge about lagoon walk-throughs and aging water samples.
Wastewater Treatment Sample Question
While performing a daily walk-through at an aerated lagoon treatment plant, you notice surface bubbling throughout the primary lagoon, except in one area. In this area, the surface is calm and uninterrupted. What is the most probable issue?
A. Blue-green algae has taken over the lagoonB. Diffuser is
