Which method is commonly used for disinfection in wastewater treatment?

Chlorination is commonly used for disinfection in wastewater treatment because it effectively kills harmful microorganisms, including bacteria and viruses, that can pose health risks to humans and the environment. By adding chlorine to the wastewater, pathogens are rendered inactive, which makes the treated water safer for release into the environment or for reuse.

Chlorination is advantageous due to its ability to provide residual disinfection, meaning that even after the initial treatment, some chlorine remains in the system to continue controlling microbial growth. This is particularly important in wastewater applications, where systems may be susceptible to contamination after treatment.

Other methods listed may play roles in the wastewater treatment process, but they are not primarily used for disinfection. For instance, filtration can remove particulates and suspended solids but does not specifically target pathogens. Carbon adsorption focuses on removing organic compounds and certain pollutants, but it does not disinfect. Dechlorination, on the other hand, is a process used to remove residual chlorine after disinfection, ensuring that chlorine does not negatively impact aquatic life when wastewater is discharged into water bodies.