NOVELTY - Processing waste prior to waste treatment comprises: mixing waste with water in mixing tank to form suspension or slurry comprising solution of water soluble waste component and heavy and light components of waste; allowing solution to stand in tank; separating heavy and light components from tank through opening and by physical method, respectively; pumping water-soluble waste solution to heated reactor; adding water and alpha -amylase and/or amyloglucosidase to reactor; maintaining controlled temperature, pH and pressure in reactor; adding beta enzyme to reactor; and cooling reactor.    USE - The method is useful for processing waste prior to a waste treatment, and for producing fuel ethanol, where the waste includes animal wastes (e.g. cow wastes, poultry wastes, hog wastes, turkey waste, chicken waste, dairy waste, human wastes, animal manure, algal biomass or fungal biomass), vegetable wastes (e.g. fruit and vegetable wastes, starch crops, potatoes, sugar crops, cane, beets, cellulosic agricultural residues, bagasse, maize stalks, wood, or wood by-products), and/or industrial food wastes (e.g. candy waste, bakery waste, rice bran, bean curd refuse, soybean meals, bread, or steamed rice fodder) (all claimed).    ADVANTAGE - The method utilizes the animal wastes to generate the fuel ethanol, thus economical, reduces the contingent liability faced by confined animal feed operations mangers and provides value added revenue stream to their livestock operation.    DETAILED DESCRIPTION - Processing at least one waste prior to a waste treatment comprises: mixing the waste with an excess of water in a mixing tank to form a suspension or a slurry, where the suspension or the slurry comprises a solution of at least one water soluble waste component and at least one heavy and light component of the waste; allowing the suspension or the slurry to stand in the mixing tank for a specified period of time, where the heavy components settle at the bottom of the mixing tank and the light components float on the top; separating the heavy components from the bottom of the mixing tank through at lest one opening at the bottom of the mixing tank, where the opening is controlled manually or automatically; separating the light components from the top of the mixing tank by at least one physical method, where the physical method comprises a decantation and/or an aspiration using a filter, a mesh or a screen; pumping the solution of water-soluble waste to a heated reactor; adding a measured quantity of water to the solution of water-soluble waste to the heated reactor; adding an alpha -amylase and/or an amyloglucosidase to the heated reactor, where the alpha -amylase and/or the amyloglucosidase liquefies at least one carbohydrate in the water-soluble waste; maintaining a controlled temperature, a controlled pH, and a controlled pressure in the heated reactor; adding at least one beta enzyme to the heated reactor, where the beta enzymes convert the liquefied carbohydrate in the water-soluble waste to at least one fermentable sugar; and cooling the heated reactor. INDEPENDENT CLAIMS are also included for:    (1) a method (M1) for producing fuel ethanol from at least one animal waste, vegetable waste and/or industrial food waste comprising: providing the heated reactor, where the heated reactor contains the animal wastes, the vegetable wastes and/or the industrial food wastes; adding a measured quantity of water to the heated reactor; and adding at least one yeast species to the cooled reactor, where the yeast species anaerobically ferments at least one fermentable sugar to fuel ethanol and carbon dioxide, and mixing the fuel ethanol with water;    (2) a method (M2) for producing fuel ethanol from at least one waste or its mixture comprising: milling or grinding the waste or its mixture; mixing the milled or ground wastes with a controlled quantity of water to form a mash; pumping the mash to a precook vessel maintained at a specified temperature; heating the mash to a specified temperature in the precook vessel by the injection of a saturated steam at a specified pressure; pumping the heated mash to a cooking vessel; holding the heated mash for a specified time for the breakdown of the carbohydrates in the heated mash; cooling the heated mash to a specified temperature by vacuum flashing; adding an amylase and/or an amyloglucosidase to the cooled mash for converting the broken down carbohydrates to at least one fermentable sugar; lowering the pH by dilution using an effluent or a thin stillage; cooling the diluted mash by using at least one heat exchanger; pumping the cooled mash to at least one fermentation reactor arranged in a network; adding the species of yeast to the fermentation reactors; converting the fermentable sugars to form at least one fermentation product, where the product comprises the fuel ethanol water mixture and carbon dioxide; and    (3) a system for processing animal wastes, vegetable wastes and/or industrial food wastes comprising: at least one mixing tank for blending a milled animal waste, vegetable waste and/or industrial food waste with water to form a mash; a precook vessel, where the mash is heated with an injection of live steam; a cooking vessel, where the mash is held for the carbohydrates to breakup into simpler sugars; at least one reactor for converting the simpler sugars into fermentable sugars in the presence of amylases and/or amyloglucosidases; a fermentation reactor network; a storage tank, where the mixture of fuel-ethanol water and carbon dioxide are stored prior to the separation; a recovery or a separation system comprising 2 distillation columns and the stripping column; and at least one ancillary equipment including blenders, steam injectors, steam ejectors, vacuum generators, condensers, pumps, heat exchangers, cooling towers, flash drums or reboilers.