Texas Wastewater Class B Practice Exam

What is the likely effect of extensive use of garbage disposals in a community on the collection system?

1. Decrease in flow

2. Increase in the amount of flow, solids, and grease

3. Reduction in maintenance needs

4. Lower energy consumption

The correct answer is: Increase in the amount of flow, solids, and grease

The extensive use of garbage disposals in a community typically leads to an increase in the amount of flow, solids, and grease in the wastewater collection system. When food waste and other organic materials are processed through a disposal unit, they are ground up and sent directly into the plumbing system. This action can significantly enhance the volume of solids that enter the sewer lines. As these solids break down, they can release grease and oils, which can contribute to blockages and require more frequent maintenance of the sewer system. Furthermore, the increased flow generated from these disposals can place additional stress on the treatment facilities, as they need to handle not just higher volumes but also the more concentrated load of solids and grease, potentially leading to operational challenges such as overflows or more intensive treatment processes. This pattern underscores the important relationship between household practices, like using garbage disposals, and the operational capacities of wastewater collection and treatment systems.