The growth of Fotnes atitiosus in liquid medium was uihibned by phenols whieh were oxidr/ed by the fungus and/or indueed high laeease aeilivity. The effeet ot sonie ot tlie tested phenols was diftereni when they were applied to wood.The applieabilily of hydroquinone In spruee-stenis as proteeimg agent against invasion ot Fotnes annosus is diseussed.

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Organic matter from spent bleaching effluents (from chlorination (C) or extraction (E) stages, or a mixture of both) was effectively precipitated as a water insoluble complex with polyethyleneimine (polyimine). Precipitation was performed in a pilot unit operating automatically. The colour, chemical oxygen demand (COD), and adsorbable organic halogens (AOX) were reduced in the C-effluent by up to 92%, 65%, and 84%, respectively. Regarding the E-stage effluent, reduction was up to 76% for colour, 70% for COD, and 73% for AOX. No significant reduction of BOD5 was observed in the supernatant of the treated effluent. Fish toxicity was greatly reduced. Laccase increased the molecular weight of the effluent constituents, thus facilitating subsequent precipitation. After treatment with laccase, the bulk of mono- and dichlorophenol is coprecipitated with the liquors from the C and E bleaching stages. Fungi (representatives of the genera Aspergillus and Penicillium) achieved an appreciable level of degradation of chlorophenols and other chloroorganic compounds from the bleaching effluent.

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Polymerization of Water-Insoluble Lignins by Fontes annosus SummaryKraft Lignin and spruce lignin (Björkman-Lignin) are partially polymerized when added to the cultures of Fomes annosus äs a Substrate in addition to glucose or cellobiose. The addition of either lignin resulted in a higher mycelial yield of the fungus and a specific secretion of laccase into the culture medium. Polymerization of lignin could be prevented by the addition of the laccase Inhibitors, e. g. thioglycolic acid or sodium azide to the culture medium. Polymerisation von wasserunlöslichen Ligninen durch Fomes annosus