TECHNOLOGY FOCUS - FOOD - Preferred Method: The refining process comprises separating at least some protein from light steep water to produce second protein portion and process water comprising protein; combining second protein portion with previous protein portion; converting at least some of starch from separating step, first fiber portion, or both to saccharides; adjusting pH of starch or first fiber portion to 4-5 and contacting starch or first fiber portion with alpha -amylase active at pH of 4-5; separating at least some of saccharides from first fiber portion to produce saccharides and second fiber portion comprising fiber; fermenting at least some of saccharides for producing ethanol; and digesting anaerobically at least some of saccharides to produce biogas and final waste water. The separation of saccharides is by filtration comprising separating at least some of protein from first fiber portion to yield third protein portion, and combining third protein portion with previous protein portion. The steeping process comprises converting at least some of starch in light steep water to saccharides; separating by filtration saccharides and protein from light steep water to yield fourth protein portion; digesting aerobically at least some of saccharides to produce yeast biomass; combining yeast biomass with previous protein portion; digesting anaerobically at least some of the saccharides, producing a biogas and a final waste water; burning biogas to produce second quantity of energy and at least powering at least one previous step with second quantity of energy; combining fourth protein portion with previous protein portion; and digesting anaerobically biologically available organic residues from process water to produce biogas and final waste water. The burning process produces ash which can be used as fertilizer additives, land application materials, and cement additives. EXAMPLE - About 500 g of fiber mash were pH adjusted from 4.02-4.54 using 40% sodium hydroxide (0.58 g). Fuelzyme-LF(RTM: alpha -amylase) (0.09g) were added to mixture, and was agitated and heated to 100 degrees C for 90 minutes, then was cooled to 62 degrees C, at which point pH was adjusted to 4.2 with sulfuric acid and glucoamylase enzyme (0.1 g) was added. The mixture was left stirring under these conditions for about 16 hour; samples were taken for sugar analysis at 6 hour and 16 hour. The above procedure was repeated with alpha -amylase liquefaction enzyme most active at about pH 5.6, but in this case the initial pH adjustment was from 3.8-5.6. Correspondingly more sulfuric acid was required to reduce pH back down to 4.2 for saccharification stage. The results showed that Fuelzyme-LF(RTM: alpha -amylase) gave good yield of dextrose very rapidly. After 16 hours the difference between the 2 enzymes is smaller but still significant. Corresponding changes in concentrations of higher sugars were also seen.