Overview
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 a student with basic wastewater treatment knowledge or for an advanced student that needs to evaluate alternative disinfection alternatives for CSO treatment.
The student is expected to read and review the material contained in the Combined Sewer Overflow Technology Fact Sheet, Alternative Disinfection Methods UPEPA, EPA 832-F-99-033
The student must take a multiple-choice quiz consisting of twelve (12) questions at the end of this course to earn PDH credits.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- General requirements of the USEPA Clean Water Act
- Water chemistry
- Wastewater treatment technologies
- Wastewater treatment terminology
- Alternative disinfection technologies
- Support information for choosing alternative technologies
Course
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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