What is the primary purpose of prechlorination of treatment plant influent?

Prechlorination of treatment plant influent primarily serves to reduce bacteria, control odors, and increase dissolved oxygen levels. By introducing chlorine to the influent prior to the primary treatment processes, it effectively disinfects the water, thereby minimizing harmful pathogens that could pose health risks. This step is critical in ensuring the safety and efficiency of the treatment process, especially in preventing the spread of waterborne diseases.

Additionally, prechlorination helps to mitigate unpleasant odors often associated with the decomposition of organic matter in wastewater. Chlorine reacts with certain compounds to neutralize these odors, resulting in a more manageable treatment environment.

While the other options present valid concepts in wastewater treatment, prechlorination specifically does not concern the act of increasing temperature, enhancing nutrient levels, or removing heavy metals. Instead, its focus is on disinfection and odor control, making it a crucial early step in the wastewater treatment process.