Which of the following is a common method to control wastewater odors in collection systems?

Regular cleaning of wet wells is a common and effective method to control wastewater odors in collection systems. Over time, waste materials can accumulate in wet wells, leading to anaerobic conditions that produce sulfur compounds and other odor-causing substances. By regularly cleaning these areas, operators can remove settled solids, grease, and other debris that contribute to foul odors. This proactive maintenance reduces the potential for odors to develop and enhances the overall operation of the collection system.

While other methods, such as aeration techniques, chemical masking agents, and activated carbon filters, can help mitigate odors, they often serve as supplementary measures rather than primary solutions. Cleaning wet wells directly addresses the source of the problem, making it a fundamental practice for maintaining odor control in wastewater collection systems.