Operations of Wastewater Treatment Plants Practice Exam

Chlorine and ultraviolet light are widely recognized as effective disinfectants in wastewater treatment processes. Chlorine is used due to its strong oxidizing properties, which allow it to effectively eliminate bacteria, viruses, and other pathogens present in wastewater. It can be applied in various forms, including chlorine gas, hypochlorite, and chloramines, depending on the specific treatment requirements and regulatory standards.

Ultraviolet light serves as a non-chemical disinfection method that relies on UV radiation to inactivate microorganisms. It disrupts their DNA, preventing reproduction and rendering them harmless. The use of ultraviolet light in conjunction with chlorine can enhance overall disinfection performance, reduce reliance on chemical disinfectants, and minimize the potential formation of harmful disinfection byproducts.

Together, chlorine and ultraviolet light represent both traditional and innovative approaches to wastewater disinfection, making this combination a standard practice in many treatment facilities.