This manual covers the more traditional disinfection methods, chlorination, as well as other widely used methods such as on-site sodium hypochlorite generation and ultraviolet disinfection methods in detail. Additionally, several alternative disinfection methods, such as chlorine dioxide and peracetic acid, are covered. With each disinfection technology covered, the manual discusses the properties of the disinfectant, equipment configurations, operating considerations, troubleshooting, and hazards and safety. Each section contains a chapter quiz, answers and references. Designed as an information resource and training manual for municipal and industrial operations personnel who oversee wastewater disinfection processes at their facility or who make decisions regarding upgrades to wastewater disinfection systems. Though operations staff is the key audience, the manual can serve as a resource to consultants, engineers, academics, trainers and manufacturers' representatives.