The Port of Tillamook Bay (POTB), an industrial park located on the Oregon coast, ordered a complete manure anaerobic digester worth $5.6 million from DARITECH. The digester includes a 1.2 MW 2G® avus biogas CHP (Combined Heat and Power) system, which is highly efficient. The CHP system has a fully integrated prime mover with a 2G avus 1200, an MWM core engine, and a capacity of 1,200 ekW/h or 9,960 MW p.a. electrical power and 1,225 kWh/th of thermal power. Additionally, 2G Energy Inc. supplied the complete gas treatment, including cooler, dryer/dehumidification, and H2S removal system, as per the customer's requirements. The customer also selected the 2G thermal heat distribution system, which includes a hydronic junction. This system ensures that the CHP maintains optimal thermal performance at any time in different load situations. This advanced technology decouples the primary heating source circuit from the secondary consumer circuit, achieving consistent function in all operating states. 2G THDAs provide the most energy-efficient heat transfer. The system also allows for tighter temperature control because of the infinite system's ability to regulate temperatures gradually. The new biogas facility replaces the smaller, plug-flow digester POTB has been using since 2003.

The plant is situated within the foundation of a former World War II blimp hangar and will process manure from the equivalent of 5,000 milking Holsteins from Tillamook community dairies. Manure will be delivered in tanker trucks, and the treated effluent will be returned to the dairies for agricultural applications. Only manure will be digested and no substrates will be used. The new system has three 1-million-gallon insulated tanks, two for digestion and a third for "finishing" the effluent. There are also two 250,000-gallon storage tanks, one for receiving manure and the other for off-loading back to the farms that are bringing manure to POTB. This modern biogas plant will provide electricity to the Tillamook People's Utility District. POTB plans to sell the fiber by-product to nurseries and other horticultural users across the Pacific Northwest and northern California.