Ace the Texas Wastewater Class B Test 2025 – Dive In and Flow to Success!

Primary treatment of wastewater is a crucial initial step in the treatment process, focusing primarily on the physical separation of solids from liquids. This stage typically involves the use of settling tanks or basins where wastewater is held so that heavier solids can settle to the bottom, forming sludge. Additionally, lighter materials such as oils and grease rise to the surface, creating scum, which is also collected and removed. The purpose of primary treatment is to reduce the overall organic and solid material in the wastewater, making it easier and more efficient to treat in subsequent stages.

Other processes mentioned in the alternative choices are associated with secondary or advanced treatment methods. Chlorination and biological treatment are part of secondary treatment aimed at reducing remaining organic matter and pathogens. Membrane filtration and UV treatment are advanced methods that focus on further purification and disinfection of treated water, rather than initial separation. Mechanical aeration and phosphorus removal are also tactics used in more advanced stages of wastewater treatment to enhance the breakdown of organic matter and nutrient removal.