Diverted from landfill,
converted into renewable energy.

Efficient systems that are essentially
waste free.

Our Facility

Columbia Biogas is developing a clean, renewable energy production facility in Portland, Oregon that will process solid and liquid food waste supplied by local generators including grocery stores, restaurants, and industrial food and beverage processors. Biogas will be biologically produced using an enclosed anaerobic digestion process which is a common secondary treatment process in municipal wastewater treatment plants across the United States. The biogas will be utilized to generate electrical power onsite which will be supplied to the local power grid. The facility will also produce organic-based fertilizer products.

  • The facility design includes proven and reliable equipment to efficiently receive and process a broad range of solid and liquid food waste that currently cannot be processed in the region.

  • Our facility site is in close proximity to downtown Portland providing convenient access for waste haulers to deliver food waste from all parts of the three-county Portland metropolitan area.

  • The process technology is well-proven in thousands of facilities globally including over 125 facilities in the United States.

The project site has been secured under a long term lease option and all key permits have been granted. The site is located in Portland, Oregon at 6849 NE Columbia Boulevard.



Our technology

Anaerobic digestion technology is well-proven and in use at thousands of facilities worldwide. It is an advanced method of recycling organic waste and it is reliable, cost-effective, and highly efficient in the production of both renewable energy in the form of biogas and valuable fertilizer byproducts. Common applications include wastewater plants, dairy farms, and food processors.

The biogas industry has experienced exponential growth in various European countries during the past ten years. Biogas equipment has been standardized and is proven to be reliable at thousands of facilities throughout Europe. As of 2010, there are nearly 7,000 plants operating in Europe, corresponding to 2,250 megawatts of total capacity (see figure below).

Number of Installations and Capacity in Megawatts, Europe

In the United States, anaerobic digestion is a common technology used at municipal wastewater treatment facilities, food processing facilities, and in the processing of manure at dairy farming operations. As of 2010, 150 anaerobic digesters were in operation in the United States. In recent years, several industrial-scale digester facilities similar to the proposed CBG facility have been built and are successfully operating in North America.

Local examples of successful uses of anaerobic digestion are Stahlbush Island Farms in Corvallis and the Port of Tillamook Bay in Tillamook. Additionally there are several local waste water treatment plants utilizing anaerobic digestion in the Portland metropolitan area including the Portland, Gresham, Durham, and Oregon City plants.

Columbia Biogas has selected leading European engineering and consulting firms for the design of the Portland facility. These firms have extensive experience in the design of the pre-treatment and digestion process of food waste processing facilities in Europe. The plant design includes tested equipment that has demonstrated high levels of reliability and includes significant redundancy to ensure year round continuous operations.

Did you know?

Anaerobic digestion

Includes a series of processes in which microorganisms break down biodegradable material in the absence of oxygen. Similar to a cow’s digestion process, microorganisms consume the fats, sugars and proteins in the food waste to produce biogas. Anaerobic digestion is widely used as a renewable energy source that produces a methane rich biogas suitable for energy production, helping to displace the consumption of fossil fuels.

In addition, the digestion process produces “digestate” which is rich in nutrients and is commonly used as fertilizer.