Deodorants that can remove odors from wastewater: 1. Activated carbon, 2. Oxidants, 3. Biological deodorants, 4. Chemical precipitants, 5. Adsorbents. Scientists and engineers have developed a variety of deodorants for different odor components in wastewater.

The prices of aluminium sulfate (alum) and polyaluminium chloride are relatively low and suitable for large-scale applications. Although polyacrylamide (PAM) has a good flocculation effect, it is more expensive and is suitable for scenarios with high requirements for flocculation effect volume.