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United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Waste-to-Energy Biomass Digester with Decreased Water Consumption
A digester with separate stages for hydrolysis and methanogenesis is disclosed. The digester includes a leachate bay reactor, which may be configured as modular, multi-bay units. Waste material is added to the leachate bay reactor. A leachate storage tank is fluidically connected to the leachate bay reactor, which facilitates hydrolysis. Leachate from the leachate storage tank is recirculated through the leachate bay reactor. A high rate methanogenic reactor is fluidically connected to the leachate storage tank to cycle the leachate in a fixed film environment for biogas production from solubilized organic matter. The reactor may be operated in an anaerobic digestion mode, or a dual aerobic-anaerobic digestion mode. The reactor may also include a struvite system having a crystallizer unit and a separation unit to reduce ammonium and phosphate accumulation during operation.
Loetscher, Lucas Hans (Fort Collins, CO), Sharvelle, Sybil (Fort Collins, CO)
13/ 197,287
August 3, 2011
GOVERNMENT RIGHTS [0002] This invention was made with government support under Grant No. DE-FG26-07NT43196 awarded by the Department of Agriculture. The government has certain rights in the invention.