Aerial view of the Biofilter (BEtO) for ethylene oxide abatement at a sterilisation site in Thailand

Biofilter for Ethylene Oxide

The eco-friendly solution for low Ethylene Oxide (EtO) concentrations and high to very high airflows. Converts EtO into CO₂ and H₂O at ambient temperature, without chemicals or natural gas. Ideal for room air vents or aeration room vents.

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Built for high airflows

Treats airflows up to 85.000 m³/h (50,000 cfm) with up to 200 ppmv EtO.

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No chemicals or natural gas

An eco-friendly technique with harmless by-products: water and CO₂.

Low OPEX

Very low operating costs

Fully automated, with low maintenance needs.

Trevi’s Biofilter - bEtOfilter

Principle

A humidified airflow is blown through a reactor which is filled with an organic carrier material. On the surface of this carrier, a selected microbial community is growing, degrading the organic compounds in the waste gas and converting the EtO into CO₂, H₂O and new biomass. The BEtOfilter operates at ambient temperature, without the need for chemicals or natural gas. 

Application

  • Waste gases with low EtO concentrations, up to 200 ppmv.
  • Waste gases with hight to very high gas flow, e.g. aeration room air flows.
Costs Trevi's bEtOfilter Catalytic Oxidizer
Investment cost Moderate High
Electricity cost Low Moderate
Fuel cost None Moderate-High
Water consumption Low None-Low
Catalyst/Acid replacement None Low
Operation & Maintenance Low Low
Waste disposal Low None
Inlet and outlet EtO concentration of the Biofilter over the first 300 days of operation

Key Benefits

Flexible / Robust

  • Operates at ambient temperature
  • Tolerant of high gas flows

Efficient / Reliable

  • Low-maintenance
  • Fully automated
  • Very low operating costs

Safety

  • Eco-friendly waste gas abatement technique
  • No need for chemicals or natural gas
  • Harmless by-products (H₂O and CO₂)
     
Biofilter (BEtO) for EtO treatment at a sterilisation site in Thailand

Crazy idea? Microorganisms that remove EtO

At a sterilisation company in Thailand, Trevi built the world's first full-scale biological filter for EtO. 

The bEtOfilter treats the site's aeration room air and keeps the outlet below 1 ppmv EtO, also during inlet peaks and changes in gas flow.

Discover the project

Speak to an EtO expert

Tell us about your EtO challenge, and we’ll help you find the right solution.

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Environmental expert at Trevi