Biofilter media to remove odour causing compounds from waste gas streams

摘要

A biofilter media has one or more of a set of desired physical characteristics. The set of physical characteristics includes a sphericity of 0.75 to 1, a particle size of 1 to 16 or 4 to 8 mm, a uniformity coefficient of 2 or less and a surface area of 800 to 2000 m2/m3 of media. The media is coated, supports microorganisms and is used to treat a waste gas stream.

主权项

1. A process for removing contaminants from a gas stream, the process comprising,
a) providing a biofilter having a medium, the medium comprising granules, wherein each granule comprises a core and a coating, wherein the granules or their cores have a sphericity of 0.75 to 1, a particle size of 1 to 16 mm and a uniformity coefficient of between 1 and 2, wherein the biofilter further comprises microorganisms; and, b) flowing the gas stream through the biofilter at a rate providing an empty bed residence time (EBRT) of 15 seconds or less, wherein the contaminants comprise hydrogen sulfide, a volatile organic compound or a reduced sulfur compound, and wherein the coating includes one or more of a bonding agent, an adsorptive agent, and nutrients for the microorganisms.