Biomass accumulation modelling in a highly loaded biotrickling filter for hydrogen sulphide removal

► A biotrickling filter treated high volumetric mass load of hydrogen sulphide. ► The particulate matter produced was characterised. ► The cause of pressure head loss increase was solids accumulation. ► A model was applied to describe the production of solids. ► Inert biomass and sulphur compounds were shown to be the main fractions of solids.