TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: In M1, the white-rot fungi active agents comprise hydrolytic enzymes, cellulolytic enzymes, or ligninolytic enzymes. Preferably, the white-rot fungi active agents consist essentially of laccase enzymes. The pretreatment is ozonization, which involves adsorption of the waste on a biodegradable support. The white-rot fungi are selected from the genus Aleurobotrys, Aleurodiscus, Amphinema, Amylostereum, Armillaria, Aspergillus, Asterostroma, Auricularia, Botryobasidium, Botryohypochnus, Calocera, Chaetomium, Cladorrhinum, Columnocystis, Daedalea, Daedaleopsis, Dichomitus, Dichostereum, Echinodontium, Fibulomyces, Fomitopsis, Fusarium, Grifola, Hapalopilus, Humicola, Hymenochaete, Hyphoderma, Hyphodontia, Hypochnicium, Inonotus, Irpex, Laurilia, Laxitextum, Lentinus, Lenzites, Lentinula, Leucogyrophana, Lycoperdon, Marasmius, Merulius, Mycoacia, Myrothecium, Panellus, Penicillium, Peniophora, Pestalotia, Phanerochaete, Pholiota, Pleurotus, Polyporus, Poria, Punctularia, Resinicium, Scytinostroma, Steccherinum, Trametes, Trichoderma, Tyromyces and Vararia. Preferably the white-rot fungi are selected from the genus Acanthophysium, Coriolopsis, Clitocybula, Cystostereum, Ganoderma, Paecilomyces, Perenniporia, Phellinus, Phlebia, Pycnoporus and Trametes. Preferably, the white-rot fungi is Acanthophysium bisporum MUCL 32213, Coriolopsis polyzona MUCL 38443, Cystostereum murraii MUCL 33747, Ganoderma subamboinense MUCL 38859, Lentinus cladopus MUCL 28678, Lentinula edodes MUCL 29756, Lenzites betulina MUCL 38559, Merulius tremelosus MUCL 38065, Paecilomyces variotii MUCL 21705, Perenniporia medulla-panis MUCL 40050, Perenniporia ochroleuca MUCL 41114, Perenniporia tephropora MUCL 41562, Phanerochaete chrysosporium MUCL 19343, Phanerochaete ericina MUCL 33845, Phellinus rimosus MUCL 38446, Phlebia subserialis MUCL 33724, Polyporus brumalis MUCL 29280, Polyporus ciliatus MUCL 40141, Pycnoporus cinnabarinus MUCL 38520, Pycnoporus coccineus MUCL 38525, Pycnoporus sanguineus MUCL 41625, Trametes versicolor MUCL 38412 and MUCL 28407, Clitocybula dusenii DSM 11238, Trichoderma harzanium MUCL 29707 and T.longibrachiatum MUCL 39887. The white-rot fungi are grown in a media containing malt extract in a concentration ranging from 0.5-8 vol/wt.%. The white-rot fungi are added to the liquid waste in an encapsulated form, in a matrix consisting of polymers. The polymers are selected from alginate salts, carrageenan salts, iota-carrageenan salts, maltodextrin, whey protein concentrate (WPC), skimmed milk powder (SMP), dried yeast autolysate (YA), dried yeast extract (YE), corn starch (CS), modified starch (MS), and polyvinyl alcohol. The white-rot fungi are employed in an immobilized form on a support selected from stainless steel support, polymer support and wood support. The support is preferably wood. The white-rot fungi active agents are employed as raw preparation, as purified enzymes, or in an immobilized form. Preferably an inductor is added to the white-rot fungi culture, preferably after the fungi has reached a significant bio-mass. The inductor has an azo anthraquinonic or a stilbenic dye structure. The inductor has a phenolic, aromatic or metallic structure. Oxygen is added during the incubation of the white-rot fungi in the pretreated liquid waste. A suitable amount of nutrients are added during the incubation of the white-rot fungi in the pretreated liquid waste. The nutrients are added in an amount ranging from 0.5-4 w/v%. The pH during the incubation of the white-rot fungi or active agents in the pretreated liquid waste is ranging from 4-9, 2-7 and/or 1-9 and the temperature of incubation is ranging from 20-45 degrees C, 20-70 degrees C and/or 18-70 degrees C, respectively. The white-rot fungi is incubated with the pretreated liquid waste for 2 hours-14 days or 20 minutes-14 days. The white-rot fungi obtained are separated. The separated fungi are reused in the process.In (M2) the support comprises a wood support. The wood support is immersed with the fungal culture supernatant in a quantity comprised between 0.1 and 100 g/L of fungal culture supernatant. The wood support is immersed in the fungal culture supernatant for 1 second-24 hours. EXAMPLE - The decoloration of an industrial dye effluent was studied. Pretreatment consisted of ozonolysis. The effluent was then treated with a fungus, Pycnoporus sanguineus MUCL 41582, immobilized on a wood support. The efficiency of the support was determined by measuring the decoloration of the industrial dye 8 or 20 days after treatment with the immobilzed fungi. After 8 days, the color of the industrial dye effluent in APHA units was 20000, and after 20 days it was 0 i.e. clear.