Setting a new standard in Ethylene Oxide abatement
Trevi delivers proven Ethylene Oxide (EtO) abatement systems that surpass the strictest requirements.
With over 100 installations worldwide over the last 30 years, our technologies ensure safe, efficient, and compliant EtO removal for every EtO concentration and gas flow.
+100 installations
30 years of experience
Up to 99.9999% DRE
Which system fits your situation?
Selection by concentration and gas flow
- SwEtO – Smart Wet Scrubber: low and high gas flow, high EtO concentrations.
- AcEtO – Acid Wet Scrubber: low and high gas flow, high EtO concentrations.
- BEtO – Biofilter: high air flow and low EtO concentrations.
- DEtO - Dry Scrubber: Low and high gas flow, low EtO concentrations.
Trevi's EtO Abatement Technologies
The SwEtO (Smart Wet Scrubber) absorbs EtO in water, where a solid catalyst hydrolyses it into ethylene glycol. It needs no sulphuric acid, so there is no acid to handle, store or dispose of. Existing acid scrubbers can be converted to this design.
- Up to 99.9999% DRE
- Up to 75% lower operating costs
- Water and a solid catalyst, no acid
The AcEtO (Acid wet scrubber) absorbs EtO in a 15% sulphuric acid solution, where it is hydrolysed into ethylene glycol. It handles very high EtO concentrations and variable gas flows, at ambient temperature and without fuel heating.
- Above 99% EtO removal
- More than 100 installations worldwide
- Less than 4 hours of operator time per month
The Biofilter (BEtO) passes humidified waste gas through a bed of organic carrier material. Microorganisms on the carrier break EtO down into CO₂, water and biomass, at ambient temperature. It is built for aeration room and room air vents.
- Outlet below 1 ppmv EtO at full scale
- Up to 200 ppmv at the inlet, airflows up to 85,000 m³/h
- No chemicals or natural gas
The Dry Scrubber passes the gas through a bed of solid sorbent that captures and reacts with EtO at room temperature. It suits low EtO concentrations and smaller gas flows, standalone, in series or as a polishing step after a bEtOfilter.
- Consistently above 99% EtO removal
- No water or liquid waste streams
- Compact, with a low investment cost
Combined technologies for maximum DRE
Where emission limits are very strict, or a site has several EtO sources, we combine technologies in one treatment line. Each stage treats what the previous stage leaves behind, so the overall destruction and removal efficiency (DRE) rises with every step.
We size each line based on your process data, so stages are only added where your emission limit requires them.
EtO projects in practice
Speak to an EtO expert
Tell us about your EtO challenge, and we’ll help you find the right solution.
