CalBio designs, develops, operates and finances, as needed, digester projects. We have learned what works based on over a decade in the business, building digesters for California dairies. We are experienced in the key project components: engineering, permitting, equipment selection, construction, and operation management.
We are experts in generating electricity and, in the near future, will be producing renewable natural gas (RNG) for use as a vehicle fuel. We work closely with the state and federal agencies on grant and environmental credit programs to make your project an economic success. We have won grants from the California Department of Food and Agriculture, the California Energy Commission, the California Public Utility Commission and the San Joaquin Valley Air Pollution Control District and have utilized U.S. Treasury tax programs and USDA farm incentives.
Founded with a dairy farmer and working in partnership with 4Creeks, we also focus on enhancing dairy operations – based on your specific needs, to save you time, money and set you on a strong course for the future.
1. WASTE COLLECTION
Waste collection is integrated with a dairy’s existing operations. Manure is flushed into collection areas and then flows to an anaerobic digester, with solids separation before the digester.
2. BIOGAS CAPTURE
In the anaerobic digester, microorganisms break down the organic matter and create biogas, which is then trapped in the digester. The captured biogas primarily consists of methane that otherwise would have been released to the atmosphere.
3. RENEWABLE ENERGY
The methane is then destroyed via combustion to generate either renewable electricity or Renewable Natural Gas (RNG) which is used to power a truck, bus, or car.
In RNG projects the dairy biomethane is injected into the utility pipeline and used to power a California vehicle. The revenue is based on the California Low Carbon Fuel Standard (LCFS) credit, the US EPA Renewable Identification Number (RIN) credit, and the sale of the methane itself.
In electricity projects electricity is exported to the grid. One revenue source is the BioMAT program with PG&E and SCE, and revenue is enhanced by storing the biogas and producing electricity at the most valuable time of day. Electricity can also be used in electric vehicles which will generate LCFS credits.
4. EFFLUENT USE
The digested effluent water can be recycled as flush water, resulting in cleaner lanes, better hygiene and less slips and falls. The digestion process increases the conversion of the raw manure’s organic nitrogen into an inorganic form (over 60% conversion) making the nitrogen more available to the crops, improving crop yield and saving costs.