TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Materials: (C) is soluble in water, preferably also in triglycerides and/or mineral oil, and is particularly a surfactant (III). The granules have average diameter 0.5-5, especially 1-2.5, mm; they are not oxygen generating and contain nutrients for (B). Particularly they contain 1-50wt.% (III), optionally also a wax (particularly a paraffin wax) at 1-50wt.% of total composition. Particularly (I) and (B) are absorbed on to a base (especially an organic, biodegradable material) before being dispersed in (C). Preparation: A polyether is heated to at least its softening point (30-100degreesC), then (I) and (B) mixed in. The resulting uniform dispersion is then granulated. Preferred Process: (A) are flushed down toilets or drains; added to grease traps or sewage conduits, or broadcast over lagoons and pits.    TECHNOLOGY FOCUS - BIOLOGY - Preferred Bacteria: These produce (I) and are:(i) able to digest fats, particularly Pseudomonas putida or P. oleovorans;(ii) spore-forming Bacillus, e.g. B. subtilis or B. licheniformis or(iii) psychrophilic bacteria that grow well at 0-20degreesC, e.g. B. psychrosaccharolyticus or B. cereus.    TECHNOLOGY FOCUS - POLYMERS - Preferred Polymer: The surfactant is a polyether with melting point 30-100degreesC.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preparation: A dry, granular enzyme product was prepared by mixing 33 weight parts of an ethoxylated soya sterol surfactant (melting point 80degreesC) with 67 weight parts of Maxicel 150 (RTM for cellulase on prilled titanium dioxide). The uniform mixture was cooled and solidified at about 26degreesC, and broken into granules using a chopping extruder. Preferred Materials: (D) is:(i) calcium or magnesium carbonate or sodium hydrogencarbonate;(ii) a pH-regulating carbonic salt; or(iii) limestone. EXAMPLE - A dry, granular enzyme product was prepared by mixing 33 weight parts of an ethoxylated soya sterol surfactant (melting point 80degreesC) with 67 weight parts of Maxicel 150 (RTM for cellulase on prilled titanium dioxide). The uniform mixture was cooled and solidified at about 26degreesC, and broken into granules using a chopping extruder. For decomposition of grease, the cellulase is replaced by amylase or lipase.