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

Biofilters are commonly used for odor control in wastewater treatment due to their ability to remove odorous compounds from air. The process involves passing air through a biological medium where microorganisms degrade the odor-causing substances. Biofilters are particularly effective because they utilize natural biological processes, making them a sustainable option for managing unwanted odors in various stages of wastewater treatment.

In comparison to other methods, biofilters operate at relatively low energy costs and involve using natural materials that can support microbial life, enhancing the breakdown of volatile organic compounds and sulfur compounds often responsible for foul odors. Their design can be tailored to the specific types of odors present, making them adaptable to different treatment scenarios.

Other methods, while effective for various purposes, may not specifically target odor control as efficiently or sustainably. For example, thermal treatment primarily focuses on waste volume reduction and may not address odors effectively in all cases. Ultrafiltration is aimed at separating solids from liquids, which does not inherently provide odor control. Ozonation, while capable of treating odors, involves complex systems and potential byproducts that necessitate careful management. Thus, biofilters stand out as a practical and efficient choice for controlling odors in wastewater treatment processes.