Why are high-temperature discharges to sewers a concern?

High-temperature discharges to sewers are a significant concern primarily because they can lead to corrosion of pipes. Elevated temperatures can accelerate the rate of corrosion in various materials used for sewer pipes, such as metal. When the temperature of the wastewater is high, it can alter the chemical reactions taking place, leading to the breakdown of pipe materials over time. This can ultimately result in reduced lifespan of the infrastructure, leaks, or even catastrophic failures in the sewer system.

Other options present valid issues associated with high-temperature discharges, such as promoting slime growths or altering bacterial populations, but the most immediate and damaging impact relates to pipe integrity and corrosion. High temperatures can also enhance odor production due to increased microbial activity; however, these are secondary to the structural concerns that arise from corrosion, making it the most critical issue to address.