Fair Oaks Dairy | Fair Oaks, IN / Central Digester
• DVO 3 cell mixed plug-low digester with 7.35 Million gallons of capacity, processing 175 million gallons of manure per year from 12,000 lactating cows to produce 1,200,000 cubic feet of biogas per day.
• Source dairies are sand bedded and manure is vacuumed from barns. Sand is removed and then the manure is pumped into the digester. Post digester large fiber is removed before being run through a DAF separation system with polymer to achieve final effluent with 1-2% solid content.
• In 2011 a Greenlane Gas cleanup and pressurizing system was installed to fuel 42 CNG class 8 trucks to haul milk to locations in Indiana, Kentucky, and Michigan.
• In 2015 a Trident second stage manure solids separation system was installed to remove phosphorus. Ten percent of the high nutrient content solids are sold to a fertilizer plant located three miles north of the digester.
• The RNG produced is currently generating RIN and LCFS credits
Fair Oaks Dairy | Site 2 Digester
• In 2003 Fair Oaks installed a vertical plug-flow digester with 1.7 million gallons of capacity in the form of four tanks that were decommissioned in 2014 due to solids build up and increasing cost of operation.
• DVO 2 cell mixed plug-flow digester built in 2017 with 4.4 million gallons of capacity processing 63 million gallons of manure per year from 4,300 lactating cows to produce 430,000 cubic feet of biogas per day.
• Source dairy is sand bedded manure is vacuumed and scraped from barns. Sand is removed and the manure is pumped into the digester. Post digester large fiber is removed before being run through a DAF separation system with polymer to achieve final effluent with 1-2% solid content.
• The RNG produced is currently generating RIN and LCFS credits
Prairies Edge Organic Dairy | Fair Oaks, IN
• Built in 2015 for a 1000 cow organic dairy.
• Manure is not currently digested
• Sand is separated with a single Mccalanahan sand screw and Hydrocyclone system
• Manure solids are separated with a US Farm Systems slope screen and a US Farm Systems screw press
• Sand is dried on the concrete pad and then re-used
Den Dulk Dairy | Ravenna, MI
• Built in partnership with Grand Valley State University in 2007. Biogas was scrubbed and used to power a 30kw microturbine. The facility was sized to accommodate 1000 cows
• Five hundred thousand gallon capacity or 9.3 million gallons of manure per year.
• Bedding is produced from separated solids using Fan screw presses.
• Digestor and gas production were decommissioned in 2012 due to high heating costs and low gas revenues.
Hilarides Dairy Digester | Lindsay, CA
• Built in 2005
• Two covered lagoons with 12 million gallon capacity; processing 180,000 gallons of manure per day from 15,000 cows to produce 233,000 cubic feet of biogas per day.
• On site CNG plant to fuel the dairies milk trucks and the onsite fleet.
• Early leader in biogas CNG.
Hidden View Digester | Rensselaer, IN
Built in 2007
• 4,200 milking cows with rotary and with robotic parlors.
• Mixed plug-flow digester with 2.7 million gallon capacity 55 million gallons of manure per year and 420,000 cfm biogas.
• Powers two Gauscor generators.
• Automatic lane scrapers.
• Utilizes flume system throughout the barn