An Ethylene Oxide (EtO) scrubber is a critical air pollution control and safety system designed to treat exhaust gases containing ethylene oxide generated from chemical manufacturing units, sterilization facilities, pharmaceutical plants, and specialty processing operations. EtO is a highly reactive, toxic, flammable, and carcinogenic compound, and even very small releases can pose serious risks to human health, plant safety, and regulatory compliance. Because of these risks, EtO emissions are governed by extremely strict exposure and discharge limits, making reliable scrubbing systems essential. EtO scrubbers are engineered to capture and neutralize ethylene oxide vapors before they are released into the atmosphere. Unlike conventional acid or alkaline gas treatment, EtO control requires careful consideration of solubility behavior, reaction kinetics, temperature effects, and explosion safety. In most industrial applications, EtO scrubbers are designed as multi-stage wet scrubber systems, often starting with a water absorption stage followed by a chemically active or catalytic stage to achieve very low outlet concentrations, typically in the ppm or sub-ppm range. One of the key advantages of a properly designed EtO scrubber is its ability to manage highly variable operating conditions. EtO emissions are not always continuous; they frequently occur during batch venting, sterilization cycles, start-ups, shutdowns, or emergency pressure relief events. A robust scrubber system ensures consistent removal efficiency during these fluctuations, preventing breakthrough and minimizing the risk of flammable or toxic gas accumulation in downstream ducting and exhaust stacks. Material selection and system safety are also critical aspects of EtO scrubber design. Systems are typically constructed using corrosion-resistant materials such as FRP, PP, or HDPE, with careful control of static charge, pressure drop, and liquid distribution. Advanced EtO scrubbers incorporate features such as controlled liquid recirculation, temperature monitoring, emergency interlocks, and fail-safe operation to ensure continuous 24/7 reliability. Beyond regulatory compliance, EtO scrubbers significantly enhance overall plant safety by reducing explosion risk, protecting equipment, and improving workplace air quality. As emission regulations tighten and safety expectations increase, EtO scrubber systems have become an indispensable part of responsible, compliant, and sustainable industrial operations
