NOVELTY - Anaerobic digester (10) comprises pre-digestion treatment chamber (12) where solid waste liquid suspension (14) is heated to desired pre-digestion temperature and exposed to aerobic conditions, and comprises inlet(s) (16) to add at least one chemical/biological additives to provide desired carbon:nitrogen ratio in waste and to improve anaerobic digestibility of waste; and anaerobic digester chamber (30) coupled to pre-digestion treatment chamber at digester chamber inlet to receive suspension, and comprises floor, walls and ceiling, digester chamber outlet and gas collection ports.    USE - As an anaerobic digester for anaerobic digestion of solid waste (claimed); and for monitoring and controlling anaerobic digestion process.    ADVANTAGE - The anaerobic digester design include innovative combinations of components to make the digester perform beyond current production levels of methane or biogas production; and provides economic advantages such as a lower cost of manufacture, a higher input of manure or source materials and the ability to modify a digester to perform from one source material to another. The design of the present digester is employed to digest a variety of different source materials such as manure, but also modified with little or no cost to handle by-products or another entire new source, e.g. ethanol production waste (corn, sorghum, cellulosics or cane sugars). Thus the apparatus improves the yield and operation effectiveness of the digester.    DETAILED DESCRIPTION - An apparatus (10) for anaerobic digestion of solid waste comprises a pre-digestion treatment chamber (12) where a liquid suspension (14) of solid waste is heated to a desired pre-digestion temperature and exposed to aerobic conditions; and an anaerobic digester chamber (30) coupled to the pre-digestion treatment chamber at a digester chamber inlet to receive the liquid suspension. The pre-digestion treatment chamber comprises at least one inlet (16) to add at least one chemical or biological additives as needed to the suspension of solid waste selected to provide a desired carbon:nitrogen ratio in the solid waste and to improve the anaerobic digestibility of the solid waste. The anaerobic digester chamber comprises a floor, walls, and ceiling; a digester chamber outlet where a suspension of digested waste solids exit the digester; and at least one gas collection port to collect gas produced in the anaerobic digester. The pre-digestion treatment chamber heats the liquid suspension at 85-150 degrees F. The chemical or biological additive comprises a carbon-rich waste product to increase the carbon content of the solid waste; a nitrogen-rich material to increase the nitrogen content of the solid waste; at least one enzyme to destruct poorly-digestible components of the solid waste; and surfactant. The pre-digestion treatment chamber has a volume equivalent selected to provide a retention time in the range of 8-48 hours based upon the flow rate of the liquid suspension of solid waste. The pre-digestion treatment chamber further comprises at least one chemical sensor to measure total carbon and total nitrogen content of the solid waste, to provide chemical analysis in real time and further to measure total phosphorus content of the solid waste. The anaerobic digester chamber further comprises triangular deflecting plates having a surface that provides points of attachment for bacteria. The apparatus further include mixers (28), heaters (26), chemical inlets, liquid spray system, various sensors and probes, and a control system to monitor and control the anaerobic digestion process and maintain microbial health of the digester. The chemical inlets are coupled to the control system and introduce acid or base to the suspension of solid waste to control the pH based upon pH measurements from the pH sensors. The liquid spray system sprays a chemical defoamer and/or antifoamer, or water. The mixers comprise peristaltic hose pumps or variable speed mixers. An INDEPENDENT CLAIM is included for anaerobic digestion of solid waste involving preheating a liquid suspension of solid waste; exposing the suspension to aerobic conditions in a pre-digestion treatment chamber; measuring total carbon and total nitrogen content of the solid waste in the pre-digestion treatment chamber; adding at least one chemical or biological additive as needed to the suspension of solid waste in the pre-digestion treatment chamber to provide a desired carbon:nitrogen ratio in the solid waste and/or to destruct a poorly-digestible component of the solid waste; introducing the suspension of solid waste into an anaerobic digester to anaerobically digest the solid waste; controlling the temperature of the suspension of solid waste in the anaerobic digester at 90-145 degrees F (32.2-62.8 degrees C); controlling the pH of the suspension of solid waste in the anaerobic digester to a pH of 5-9; mixing the suspension of solid waste; and recovering methane gas produced by the anaerobic digester.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an apparatus for the anaerobic digestion of solid waste.    Anaerobic digester (10)    Pre-digestion treatment chamber (12)    Influent liquid suspension (14)    Flow meter (15)    Inlets (16)    Heater (26)    Mixers (28)    Anaerobic digester chamber (30)