TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Components: The enzyme or the composition has cellulase activity of at least 10 units/g. The non-ionic surfactant is present at least at 0.1 wt.% of the (i) and (ii) or the composition. The enzyme and the non-ionic surfactant are present in a weight ratio of enzyme:non-ionic surfactant of 0.1:10 to 10:0.1. The cellulase activity of (i) and (ii) or the composition is at least 10% greater than using (i) alone. The enzyme comprises a lipase. In the method to degrade, cellulose fiber is present and is at least partially degraded, and the solid contents of the sludge are reduced. The sludge comprises cellulose material (0.1-70 wt.% of dry sludge). The sludge is reduced to at least partially formed sugar, glucose and/or shorter-chain cellulose. The sludge is primary sludge or secondary sludge. The enzyme is present at 0.05-35 wt.% of (i) or (ii) or the composition. Preferred Method: The sludge in part forms sugar. The method further comprises converting the sugar to ethanol in a fermentation process. The method occurs at 5-75 degrees C. The method is conducted in the absence of any separate addition of acid or alkaline, or both. The method prior to the de-watering the sludge occurs for 1-120 hours. (i) and (ii) are added sequentially within 30 minutes of each other in any order.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The non-ionic surfactant is a block copolymer of the type polyethylene oxide-polypropylene oxide-polyethylene oxide. The HLB value is preferably at least 25 to 30. The non-ionic surfactant has an average molecular weight of 1000-20000. EXAMPLE - Sludge was obtained from a paper manufacturing plant. This sludge had a consistency of 56 wt.% sludge in water. The sludge was diluted in de-ionized water to contain 9.1 wt % solid. The solid sludge suspension had a pH of 6.95. Composition comprised of Cellic CTec (RTM: Novel cellulose complex) (0.1 wt.%) and PLURONIC F108 (RTM: Block copolymer of ethylene oxide and propylene oxide) (non-ionic surfactant) (10 wt.%) was added to the sludge suspension at 28 degrees C for 24 hours. The sludge suspension was vigorously vortexed for 2-3 minutes to de-integrate the tight pack sludge before enzyme addition. The amount of sludge solid reduction was increased when the enzyme with non-ionic surfactant was used (16.7%) compared to using enzyme alone (11.3%).