See Edward Blackmore. ...
Published by Mark Milne, Wastewater Superintendent
See Edward Blackmore. Biofilters are a very good option and are not hard to build. I have smelled them work on ATAD air with reduced sulfur compounds. Quite a feet since some of those compounds you can smell to half a part per billion. I have worked with mechanical/ chemical systems and there is less operator input to the biofilter.