Penicillium camemberti was found to be very effective in treating softwood pulp bleaching effluents and chlorinated model compounds like PCP, 2-chlorophenol and trichloroacetic acid. This paper examines the ability of Penicillium camemberti to degrade softwood pulping and bleaching effluents in anaerobic jars. Softwood chlorinated pulping and bleaching effluents inoculated with Penicillium camemberti (20 ml in 25-ml universal tubes) were incubated under anaerobic conditions (oxoid anaerobic jars) at 25 degrees C for up to 20 days. Samples were analyzed for adsorbable organic halogens (AOX), color and total organic carbon (TOC) removals and gas chromatograms of the samples were recorded. 61% AOX, 62% TOC and 57% color removal was obtained with mineral salts as nutrient and 2 g/l acetate as carbon source. It was found to be remarkable that TOC removal was extremely increased from 62% to 81% with the nutrient only, and without any carbon source. There was a slight increase in AOX (from 61% to 63%) and slight one in color (from 57% to 52%). The highest efficiencies, 62% AOX, 81% TOC and 59% color removal, were achieved, when Penicillium camemberti has been added without any nutrient and carbon source.