Exeon were asked to provide an odour control system for the reception hall of an Anaerobic Digestion (AD) plant in Liverpool processing food waste.
Similar facilities generate high odour concentrations, often exceeding 7,000ouE/m³, along with airborne dust. Without effective extraction and treatment this can create poor working conditions for staff and environmental concerns.
The Reception, Filling and Taking areas required background and localised extraction, with a total airflow of 74,189m³/hr plus additional local extraction from de-pack equipment, mixing pits and tanker venting. The system was required to achieve an odour discharge level of 1,000ouE/m³ in line with Environment Agency requirements.
Exeon designed an odour control system using a Nodour Hi-Flo™ horizontal-bed activated carbon adsorber serving the Reception and Filling areas.
The system provides three air changes per hour and incorporates integral dust pre-filtration to protect the carbon media from high dust loading.
Localised extraction from de-pack machinery, mixing pits and tanker venting is combined into a dedicated airstream for treatment, with a carbon bed contact time of 1.5 seconds to achieve the required odour reduction.
Galvanised steel spiral ductwork was installed at high level throughout the building, connecting the extraction points to the odour control plant and discharge stack.
