(a) a source which generates HAP's and/or VOC's;

(b) an air ducting system adjacent said source which captures said HAP/VOC's;

(c) at least one self-contained removable biofilter cartridge positioned adjacent said source, wherein said cartridge contains selected microorganisms which function to degrade said HAP/VOC's; and wherein said cartridge comprises an outer housing having a pair of oppositely disposed open ends, said cartridge being further positioned by insertion between a closure member which contains an exhaust port positioned at one end of said housing, and a second closure member in the form of a water reservoir positioned at said opposite end of said housing with said reservoir further containing an inlet for a source of air to be treated, with said inlet and said exhaust port being connected to said ducting system, with said closure members including means to hold and seal said cartridges in place, and circulation means positioned to promote the flow of air through said system; and

(d) where in operation, captured HAP/VOC's are transported to and through said air ducting system and cartridge which recirculates remediated air back to said source point of the pollutants, and where when a given cartridge is spent or damaged from use, it may be readily removed from the system and a new cartridge inserted in its place.