Exam Study Guide: Advantages of Plastic Media; and Treating Colder Water

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 Primary Clarifiers; and Microsand Processes. This time, you can test your knowledge about plastic media in a trickling filter, and treating colder water. Wastewater Treatment Sample Question: What is an advantage of using plastic media in place of traditional rock-type media in a trickling filter? A) More surface area for filter flies to breed B) Increased surface area for increased biofilm growth C) Increased opportunities for ponding D) The media bed is less