The farm milks 3,100 cows and has about 6,000 head. The farm’s anaerobic digester system has been operating since 2009, powering a 500 kW genset. The electricity produced was used directly on the farm and excess sold to the local utility.
Renewable products generated by the project include biofertilizer, digested dairy fiber for use as cow bedding, and reclaimed irrigation water.
In 2019, MCR was contracted to refurbish the biogas system. This included upgrading the digester with new technology capable of cleaning the methane gas and converting it into high quality (RNG) Renewable Natural Gas for use in heating or transportation.
A total of five farms contribute RNG to the system cluster. The gas processed at each farm is transported a central location where it is injected into the interstate gas pipeline. The five-farm system generates about 305,000 million British thermal units (MMBtu) of RNG each year.
RNG production: 150 MMBtus/day
MCR Work Order Approval: April 2019
MCR Start Up and Commissioning: December 2019
Original anaerobic digester: 2009
Digester system type:
Mixed Plug Flow
Dairy manure, Agricultural residues
Engine-generator set: 500 kW Guascor CHP unit