20 MW Farm & Food Waste to Biogas for Grid Injection Plant in U.S.

HDR has been awarded a contract for the design, construction and start-up of a 20 MW equivalent AD facility that will produce biogas from wastes for injection into the grid

Omaha, Nebraska based employee-owned architecture, engineering, consulting and construction firm, HDR has been awarded a contract by Heartland Biogas for the design, construction and start-up of a 20 MW equivalent anaerobic digester facility that will produce biogas from farm and food wastes in Weld County near LaSalle, Colorado.

According to HDR, the contract with Heartland Biogas - a wholly owned subsidiary of EDF Renewable Energy - also includes subcontracting and procurement services for the project

The Heartland Biogas project was developed by AgEnergy USA - a development company focused on developing agricultural energy resources into usable fuels or electricity.

HDR added that EDF Renewable Energy, the owner of the project, participated in late stage development activities.

The organic waste feedstocks include cow manure from local dairy operations and other organic wastes from the Denver metropolitan area, such as restaurant grease trap waste, spoiled food products from retail grocers and food processing residuals.

According to HDR, the waste conversion process will preclude the release of pollutants to the environment and will reduce the emission of significant amounts of greenhouse gases to the atmosphere.

The digester facility will produce three major outputs, including a biogas, organic compost amendment and liquid soil amendment products.

BDR said that the facility is expected to be fully operational in 2015 and capable of exporting 1.5 billion cubic feet (42.5 million cubic metres) 270 of renewable natural gas annually, making it one of the largest anaerobic digester facilities in North America. 

EDF explained that the raw biogas will be processed into pipeline quality Renewable Natural Gas and supplied to Sacramento Municipal Utility District (SMUD) through a 20 year Gas Purchase Agreement.

HDR said that its wholly-owned subsidiary, Kansas City Missouri based HDR Constructors is leading the project.

Construction began in in August 2013.

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