CWEA Maintenance Technologist Practice Test 2026 – Complete Exam Prep

In wastewater treatment, temperature plays a significant role in influencing microbial activity. Higher temperatures generally increase the rate of microbial metabolism. This occurs because warmer temperatures accelerate chemical reactions, leading to a rise in the activity level of microbes responsible for breaking down organic matter in wastewater.

Microorganisms have optimal temperature ranges in which they thrive, and when temperatures are elevated, enzymes involved in metabolic processes work more efficiently. This enhances the degradation of contaminants and organic materials, thus improving the overall efficiency of the treatment process. However, it is important to note that excessively high temperatures can be detrimental to some microbial populations, leading to a decline in activity, but typically, within effective operational ranges, higher temperatures promote more robust microbial processes.

The other options suggest that temperature has little to no impact or that it diminishes microbial activity, which does not align with the established understanding of microbial dynamics in wastewater treatment systems.