Filled with either calcified woodchip or peat and heather, all from renewable sources, ERG's biofilters have been refined and optimised over the years to offer outstanding value for money and simple operation. They require no storage of chemicals on site and need only a water or filtered final effluent supply and a drain connection.

Specially selected bacteria colonize the substrate media within the biofilter housing and there digest the odour-causing compounds, which typically include H2S, mercaptans, organic sulphides and ammonia. The optimised environment for bacterial activity is maintained by regular, controlled irrigation.   

Designed and built to BS4994 and fully compliant with WIMES 8.05, ERG's biofilter systems offer assured performance and competitive costing.

All our systems are custom-designed for the odour control duty required, and include a biofilter housing and irrigation system, biomedia, air extraction fan and ductwork, and electrical control panel.