An ERG dry media filter may be used as a stand-alone filter for polishing a chemical scrubber discharge or as part of a DryCat system. All our dry media filters require no operator intervention and provide guaranteed odour control performance.

ERG has treated air flowrates of less than 50m3/hr up to more than 80,000 m3/hr with a single vessel, and has a variety of configurations to offer, including deep bed, dual deep bed, annular and modular section vessels.  

Working to suit our client's requirements, ERG optimises each dry media filter design based on the required outlet emission, the specified bed life between media changes, the space available, the air flowrate, and the capital cost. And with more than 100 dry media filters installed and performing successfully since 1998, each filter system is backed by the confidence of ERG's extensive experience.

Each filter is tailored to treat the contaminant odours. We can offer systems to treat H2S, mercaptans, organic sulphides, ammonia, amines, and VOCs in any combination, and can also provide a guarantee of outlet odour concentration in ouE/m3.

Designed and built to BS4994 and fully compliant with WIMES 8.05, ERG's dry media filters offer assured performance at a competitive price.

• High removal efficiency of H2S and other odours
• Outlet H2S concentrations <5-10ppb
• VOC polish to <200 ouE/m3 achieved
• Filters to treat 200 to 200,000m3/hr
• Low pressure drop <500Pa
• Bed life designed to suit requirements
• Low capital cost
• Supplied in PVC/GRP or coated steel

Alkali impregnated carbon
Pelletised for low pressure drop, up to 25%w/w take-up of
H2S, good mercaptans removal

Acid impregnated carbon
Pelletised or granular, up to 8%w/w take-up of ammonia

Activated carbon
Pelletised or granular, for VOC removal

Water regenerable carbon
Pelletised, up to 20% w/w take-up of H2S, regenerable
using water for up to 8 cycles. Operational cost savings

Special applications
Alternative grades available for unusual duties

Oxidising media for VOC odour polishing

• Deep bed filters
• Annular filters
• Purpose made filters
• Containerised filters
• Dual deep bed filters
• Air valve vent filters

Deep bed filters

• ideal for low gas flows 200-2,000m3/hr
• can be passive or forced ventilation
• widely used for local tank ventilation
• single or dual media
• suitable for water regenerable carbon

Annular filters

• ideal for medium gas flows 2,000-40,000m3/hr
• suitable for use as a polishing filter
• very compact design with small pressure drop
• single or dual media

Dual deep bed

• ideal for medium gas flows 2,000-40,000m3/hr
• suitable for use as a polishing filter or for bulk removal
• very compact design with small pressure drop
• single or dual media
• suitable for water regenerable carbon