TECHNOLOGY FOCUS - BIOLOGY - Preferred Process: The lignocellulose-containing material is homogenized, preferably by milling, wet-milling, grinding or wet-grinding prior to or during step (b), where a base is added to the lignocellulose-containing material or the slurry prior to or while it is being homogenized. The content of the lignocellulose-containing material in the slurry is adjusted by continuous or stepwise addition of lignocellulose-containing material to the slurry during step (b), where the lignocellulose-containing material constitutes above 5 wt.%, preferably above 25 wt.% dry solids of the slurry of step (a). The step (b) is carried out at a: pH of 7-10, preferably at 8.5; and at a temperature of 20-70 degrees C, preferably 40-50 degrees C. The solids separation step is performed after step (b) but before step (c) to purge non-solubilized solids and optionally feed them back into step (a) of the process. The lignocellulose-containing material has been, prior to step (a): subjected to a microwave or an ultrasonic irradiation treatment; or mechanical and/or biologically treated. Preferred Components: The enzyme is an amylolytic enzyme, a lipolytic enzyme, a proteolytic enzyme, a cellulolytic enzyme, an oxidoreductase or a plant cell-wall degrading enzyme, including protease, pectate lyase, ferulic acid esterase, mannanase (all preferred), aminopeptidase, alpha -amylase, amyloglucosidase, arabinofuranosidase, arabinoxylanase, beta -glucanase, carbohydrase, carboxypeptidase, catalase, cellobiohydrolase, cellulase, chitinase, cutinase, cyclodextrin glycosyltransferase, deoxyribonuclease, endocellulase, endoglucanase, endoxylanase, esterase, galactosidase, beta -galactosidase, glucoamylase, glucose oxidase, glucosidase, haloperoxidase, hemicellulase, invertase, isomerase, laccase, ligase, lipase, lyase, mannanase, mannosidase, oxidase, pectin lyase, pectin trans-eliminase, pectin ethylesterase, pectin methylesterase, pectinolytic enzyme, peroxidase, phytase, phenoloxidase, polygalacturonase, polyphenoloxidase, proteolytic enzyme, rhamnogalacturonan lyase, rhamnoglucanase, rhamnogalacturonase, ribonuclease, soluble polysaccaridease, transferase, transglutaminase, xylanase or xyloglucanase. The lignocellulose-containing material is derived from corn stover, corn fiber, hard wood, softwood, cereal straw, wheat straw, switch grass, Miscanthus, rice hulls, municipal solid waste, industrial organic waste, office paper, bagasse of sugar cane, sugar beet pulp, palm fronds, palm fruits, empty palm fruit bunches and/or palm residues.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The base is sodium hydroxide, sodium carbonate, calcium hydroxide, lime hydrate, ammonia or potassium hydroxide. EXAMPLE - Raw bagasse (5 kg) pieces of 1-2 cm was suspended in city water (22.5 l) at 50 degrees C in a stirred container. Then 50% sodium hydroxide (0.6 kg) was added and alkaline treatment was performed with a gentle stirring for 2 hours at 50 degrees C. Then wet screening was performed using an Algaier VTS 600 vibrating tumbler screen, and a solid phase was collected. The solid phase was washed using city water (100 l) (40-50 degrees C) and re-screened. This procedure was repeated until a pH of 8.5 was reached and most of the color was removed. The washed pulp was added to water (100 l) and suspended by stirring. The material was pumped through a toothed colloid mill in a recirculation process once for 30 minutes. Then the mash was treated BioPrep 3000 L (RTM: Pectate lyase) (25 g), Novozym 342 (RTM: Cellulase and feruloyl esterase) (25 g), Pulpzyme HC (RTM: Endo-xylanase) (25 g) and Celluclean 5 L (RTM: Alkaline endocellulase) (25 g). The enzyme process was carried out by pumping the reactor mixture through the Fryma mill using consecutive recirculations in time intervals of 60 minutes over a total period of 4 hours. Then the biogas trial was carried out in thermophilic biogas batch reactors to produce the biogas (methane).