TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: At least one microorganism culture comprises a fungal culture, a bacterial culture or a mixture of a fungal culture and a bacterial culture. The fungal culture comprises a white rot fungus, a fungus of the genus Phanerochaete, a fungus of the genus Trametis, a filamentous fungus, a fungus of the genus Cunninghamella and/or a fungus of the genus Penicillium. The bacterial culture comprises Bacillus sp., Pseudomonas sp. or a combination of at least two species of Bacillus sp. or Pseudomonas sp.. At least one microorganism culture comprises a combination of Panerochaete sordida, Cunninghamella elegans, Bacillus subtilis, and Pseudomonas fluorescens or their mutants or derivatives. Preferred Method: In method (M1), at least one microorganism culture (0.01-10 vol./vol.%) is added to the water-borne paint and at least one nutrient (0.01-10 vol./vol.%) is added to the water.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The micronutrients comprise nitrogen and phosphorus; and further comprise at least two manganese, iron, molybdenum, copper and/or zinc.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The water comprises organic solvent-laden water-borne paint containing organic solvent (0.1-20 vol./vol.%) and is derived from the wastewater of an industrial paint booth. EXAMPLE - Degrading, detackifying and reducing solvent in water (test) comprising organic solvent-laden water-borne paint involves adding to the water an effective degrading, detackifying and/or chemical oxygen demand (COD) reducing amount of Cunninghamella elegans (5 ml), urea (10.1 g) and phosphoric acid (10 ml) to sustain the growth of the microorgansim culture and to reduce solvent content of the water. A water comprising only organic solvent-laden water-borne paint was used as a control. The test/control groups were evaluated for oxygen consumption during biological treatment of organic solvent at 100, 200 and 300 hours of time period and COD reduction. The test/control groups showed oxygen consumption rate of approximately 1000/500 mg at 100 hours, approximately 2050/525 mg at 200 hours, and approximately 3050/525 mg at 300 hours; and COD reduction of 47.02/12.06%.