Disinfection Methods for Combined Sewer Overflow (CSO) Treatment

In Disinfection Methods for Combined Sewer Overflow (CSO) Treatment, you'll learn ...

• Why chlorine may not be feasible for some combined sewer overflows (CSOs)
• Advantages and disadvantages of using chlorine dioxide, ozonation, peracetic acid, UV radiation and electron beam irradiation for CSOs
• Operating and maintenance procedures for the various CSO disinfection alternatives

Overview

Credit: 1 PDH

Length: 18 pages

Combined sewer overflows (CSOs) occur when flows exceed the hydraulic capacity of either the wastewater treatment plant (WWTP) or the collection system that transports the combined flow of storm water and sanitary sewage to the WWTP. When an overflow occurs, the excess flows tend to be discharged into a receiving body of water. CSOs typically discharge a variable mixture of raw sewage, industrial/commercial wastewater, polluted runoff, and scoured materials that build up in the collection system during dry weather periods. These discharges contain a variety of pollutants that may adversely impact the receiving water body, including pathogenic microorganisms, viruses, cysts, and chemical and floatable materials.

Following solids reduction, most systems further reduce bacterial concentrations through disinfection. Chlorine has long been the disinfectant of choice for most disinfection systems. This course looks at alternatives to chlorine that have been developed and evaluated for continuous disinfection of wastewater discharges and treatment for CSOs.

In this course the student will learn of the alternative disinfection technologies being evaluated and what their advantaged and disadvantages are. The course is suitable for engineers with basic wastewater treatment knowledge or engineers with advanced wastewater treatment knowledge who need to evaluate alternative disinfection alternatives for CSO treatment.