Big Sky West Dairy


Operational since 2009, Big Sky West Dairy’s anaerobic digestion project is owned by a joint venture of Dean Foods and AgPower Partners, and is operated by Andgar Corporation. The anaerobic digester project utilizes a modified mixed plug- flow digester designed by DVO, Inc. The digester is fed by a mix of manure from nearly 4,700 dairy cows and a small amount of other organic wastes. The manure is scraped into a flume, flushed into a collection pit, and then pumped to the digester. The biogas produced is then used to fuel two 710 kW engines, which produce electricity that is sold to the local utility, Idaho Power Co. There is also a two-stage solid-liquid separation system that is used for solid separation.

IFES Number: 199

City: Gooding

State: ID

Country: USA

Type of Firm: Farm

Main Products: Dairy

Size of Firm: Farm Scale

Technology: Biogas

Operational Status: Operational

Year Installed: 2008

Energy Feedstock: cow manure from 4700 cows; other organic wastes

Energy Uses: Electricity

New co-products: bedding

TCO2 Eq Avoided: 36,638 metric tons CO2E/yr