NAPCEN STP Order Control System it generates unpleasant odors. As a result, odor control has become a key design consideration for wastewater treatment facilities.The most common sources of odor problems include collection systems, primary treatment units, and solid handling facilities. Odors in sewage treatment plants arise from biological reactions under anaerobic or septic conditions.An effective odor control system is essential to mitigate these emissions, ensuring compliance with environmental regulations while minimizing the impact on nearby communities.Properly designed STP scrubbers help improve air quality and create a more sustainable treatment process.