Which of the following is a common odor control method in wastewater treatment?

Chemical scrubbing is widely recognized as an effective odor control method in wastewater treatment. This process involves the use of chemicals to react with and neutralize odorous compounds present in the air or wastewater. By injecting specific scrubbing solutions into the system, the undesirable gases such as hydrogen sulfide or ammonia can be absorbed or chemically transformed, thereby reducing their concentration and minimization of odor.

In contrast, other methods such as chlorination are primarily used for disinfection and may not effectively target odor substances. Filtration can help in removing solid particulates but does not specifically address gaseous odors. Meanwhile, UV irradiation is mainly used for disinfection purposes and does not have a direct application in controlling odors. Therefore, chemical scrubbing emerges as a focused technique that addresses the root cause of odors within wastewater treatment processes.