Odor Production, Prevention, and Control"" reviews the microbial activities and their operational conditions that do promote and do not promote odor production. The microbial activities or forms of respirations that are reviewed include: 1) aerobic/oxic, 2) anaerobic/anoxic, 3) anaerobic/sulfate reduction, 4) anaerobic/mixed acid production, and 5) methane production. Monitoring tools (pH, ammonia, hydrogen sulfide, ORP, and gas chromatography to identify the areas within the sewer system and treatment plant as well as the form of respirations are presented. Operational measures to prevent the production of odors are addressed as well as operational measures to control odors once they occur. Preventative and control measures presented include: 1) cleaning, 2) sewer design, 3) oxic and anoxic maintenance, 4) bioaugmentation, 5) pH adjustment, 6) disinfection, 7) sulfide precipitation, and 8) biological and chemical scrubbers. The afternoon session ""Nitrification"" reviews the operational conditions necessary for acceptable nitrification and the forms of nitrification (complete nitrification and four types of incomplete nitrification) that can be monitored for process control and troubleshooting purposes. Other topics include: operational conditions; cold wastewater temperature and limiting factors that produce incomplete nitrification; and operational measures to correct for cold wastewater nitrification and limiting factors are provided.
