Brightmark partners with farmers to harness the untapped fuel potential of their farm’s organic waste. We develop, own, and operate anaerobic digester facilities, forming long-term partnerships with the farmers and communities we work with. We strive to align ourselves with local landowners, counties, community conservation boards, and other stakeholders to ensure our projects have the most significant possible positive impacts.
In many instances, neighboring farms and local townships are our greatest allies, primarily due to the benefits that come from our digester systems—including odor mitigation, reduced likelihood of pathogen proliferation, local fuel independence, and more. The long-term nature of our partnerships gives us the confidence to invest in our projects and partner farms’ operational efficiencies.
Renewable natural gas (RNG) projects
Brightmark develops methane capture projects using anaerobic digesters. These self-contained digesters are one of the most effective solutions for capturing methane and reducing manure odors from farm operations.
The digesters are designed to capture methane molecules otherwise released into the atmosphere as an airborne nuisance. Once the biogas is captured, it is processed through gas upgraders to produce pipeline-quality natural gas. The resulting RNG is transported to the interstate pipeline for injection into the gas grid. The digester effluent is returned to the farmer for use as fertilizer.
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Putting waste to work
Benefits of the anaerobic digestion process
The process can be simplified into two steps:
Manure that undergoes anaerobic digestion is “biologically stabilized” and is no longer considered manure but rather treated effluent. The high-temperature digester tanks we install create another layer of protection by denaturing pathogen proteins by subjecting them to heat—helping prevent harmful pathogens.
Anaerobic digestion harnesses bacteria that produce biogas. This replaces other types of bacteria typical at a dairy that doesn’t have anaerobic digestion. This reduces odor-producing biological activity.
Through our anaerobic digestion processes and strategic partnerships with farmers, we’re Reimagining Waste with our renewable natural gas projects—offsetting CO2 emissions daily.
We’ve successfully offset over 200,000 tons of CO2 and are just getting started.
The effluent from an anaerobic digester has the same nutrient content as manure, with increased fertilizer potential. Anaerobic digestion converts nitrogen into higher levels of ammonium. Increased ammonium content in digested slurries has improved nitrogen uptake efficiency, leading to increased savings in fertilizer nitrogen.
Digesters help reduce pathogen levels. This results in partial sterilization of dangerous pathogens that could otherwise proliferate on fields and flow to waterways.
“With anaerobic digesters, we can help drive the industry to carbon neutral.”
– John Larson // Larson Dairy