Patent ID: 8911627

Claim:
A method for digesting a biomass, the method comprising: processing at least a portion of the biomass in a first unit to undergo a first digestion, the biomass consisting of suspended solids in a solution, wherein the first digestion is performed at a first temperature, wherein the first unit digestion is a hydrolysis reaction performed under aerobic conditions; processing at least another portion of the biomass in a second unit, wherein the at least another portion of the biomass transferred from the first unit to the second unit, wherein the at least another portion of the biomass in the second unit undergoes a second digestion, wherein the second digestion is performed at a second temperature that is higher than the first temperature, wherein conditions in the second unit are anaerobic; processing at least a further portion of the biomass in at least one third unit, wherein the at least further portion of the biomass is transferred from the second unit to the at least one third unit, wherein in the at least one third unit the processing includes a third digestion, wherein the third digestion is performed at a third temperature that is higher than either the first temperature or the second temperature; diverting at least a portion of feedstream from the at least one third unit after undergoing the third digestion, wherein diverting provides a bioproduct suitable as one or more of a fuel, supplement, fertilizer and gas.