Reference Projects

EC Oregon has provided the following anaerobic digestion feasibility studies, resource assessments and carbon offset opportunities funded by a combination of grant funding and private investment.

Feasibility Studies

An onion grower/processor in Malheur County, Oregon contracted EC Oregon to perform a feasibility study for the utilization of onion waste for anaerobic digestion. Development of a co-located dairy farm that could supply manure to the digestion process is under consideration. Avoided disposal costs and use of digestate co-products for soil tilth are main drivers for the targeted 3MW biogas plant. Energy Trust of Oregon has provided partial funding for the feasibility study.

A natural foods processor in Washington County, Oregon contracted EC Oregon to perform an anaerobic digester feasibility study for the utilization of waste streams from agricultural and processing practices. In addition to typical feasibility goals, the study has specific focus on small-scale digestion, compressed renewable natural gas, company-wide energy independence, transportation reduction and supporting Organic acre transition. Energy Trust of Oregon has provided partial funding for the feasibility study.

The Northwest Dairy Association (NDA) contracted with EC Oregon to perform feasibility studies of anaerobic digestion for dairy manure and co-digested biomass for six member dairy farms located in Oregon. The results of these studies are provided in a Summary Report (pdf) distributed to all members of the NDA cooperative, as well as the members of the Dairy Farms of Oregon. All studies were partially funded by Energy Trust of Oregon. Bonneville Environmental Foundation and a grant from the Oregon Department of Energy – Community Renewable Energy Fund each provided partial funding for two studies.

A poultry grower in Lane County. Feasibility study services were provided regarding the anaerobic digestion of poultry litter and appropriate co-digestion substrates. Both Energy Trust of Oregon and a USDA VAPG grant provided partial funding for the feasibility study.

Anaerobic Digestion Co-Substrate Assessment for Lane County, Oregon. The second phase of the Ryegrass Straw Conversion to Renewable Energy Feasibility Study in which EC Oregon analyzed available feedstocks, methane production potential, co-product values and unique handling, pretreatment and permitting issues of co-digestion substrates in the southern Willamette Valley.

Ryegrass Straw Conversion to Renewable Energy Feasibility Study for Lane County, Oregon; funded by the Oregon Grass Seed Council and Oregon Department of Agriculture. The study identifies near-term viable options for adding economic value to ryegrass straw through renewable energy and fuel production including anaerobic digestion, pyrolysis, and cellulosic ethanol conversion processes. EC Oregon was responsible for the anaerobic digestion aspects of the study.

Food Waste to Energy Project for Lane County, Oregon; funded by the Oregon Economic and Community Development Department’s (OECDD) Renewable Energy Feasibility Fund (REFF). Research items include identification, collection and transportation of food waste; anaerobic digester facility options; anaerobic digester facility energy outputs; revenue & expense review and ROI estimates & recommendations from feasibility study findings. EC Oregon was the lead researcher on the above mentioned tasks.

Stahlbush Island Farms, an on-farm food processor, in Linn County, Oregon. The digester utilizes approximately 150 tons/day (55,000/year) tons of food processing waste and agricultural crop residues. A 1.6 MW CHP plant provides hot water and steam for the processing facility and the electricity is being sold to the utility (PacifiCorp). The biogas plant was commissioned in the second quarter of 2009. For more information see our project factsheet (pdf) in addition to the BioCycle article (pdf) published January 2010 which are available for download.
Resource Assessments

EC Oregon has been contracted to do multiple resource assessments for North and South Carolina. In a region primarily known for swine and poultry husbandry, EC Oregon has identified essential co-digestion opportunities and assessed methane potential from diverse and challenging biomass residues. To date, one preliminary resource assessment has progressed to a full feasibility study focused on avoided costs related to waste disposal and thermal energy.

Grain Millers, Inc. in the U.S. and Canada. A degradability assessment was performed for a Lane County, Oregon mill producing 50 tons/day of oat hull waste. This first-phase study contained a dry digestion technology review (including pre-treatment methods), lab trials, co-substrate search and energy production estimates.

Technical Assessments

Bonneville Environmental Foundation in Portland, Oregon. EC Oregon to provide technical evaluation consulting services for the Three Mile Canyon anaerobic digestion system following startup phase.

Carbon Offset Consulting

The Climate Trust in Portland, Oregon. Technical consulting services are being provided for carbon offset projects under the Climate Action Reserves Livestock protocol.

Bonneville Environmental Foundation in Portland, Oregon. Technical consulting services are being provided for carbon offset projects under the Climate Action Reserves Livestock, Organic Waste Digestion, or Landfill protocols.