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METHANE RECOVERY FROM ANIMAL MANURES: THE CURRENT OPPORTUNITIES CASEBOOK Case Study 4.3: CONTACTS Address: Telephone: Agway Farm Stan Weeks 6978 Route 80 Tully, NY 13159-9513 315.683.5700 GENERAL SYSTEM INFORMATION Farm Type: Herd Size: System Type: Dimensions: Capacity: Biogas Production: Operational Date: 1998 Status: Project History: Dairy. 500 total head with manure from 250 manure from milkers used. Vertical concrete slurry tank with no mechanical mixing. 28 ft x 20 ft diameter. 31 7,225 ft working volume (54,000 gal). 3 12,000 ft /d (65% methane content). 1981. Operational. The Agway project is the result of management’s interest in evaluating the technology in the wake of the optimism surrounding AD technology in the 1970s. Operating experiences here, using the manure of 170 milkers and at 2 other locations, have been used to improve system design and to define operating economics. Before 1987, the digester system handled a smaller volume and was constructed with concrete staves. Because of its size and less than desirable construction, the digester was replaced with a larger, poured-concrete design. Inside the current digester “...a vertical dividing wall separates the point of manure entry and exit. No mechanical mixing of the digester contents occurs within the digester. Manure is mixed by thermal activity fostered by a concentrating heat pipe on a[n]...interior wall. The effluent is displaced by incoming manure and flows by gravity from the top of the digester into the adjoining manure storage. Some of the solids 1 can be diverted into the adjoining manure storage.” 4-11PDF Image | Methane Recovery from Animal Manures The Current Opportunities Casebook
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