Case Study
CalBio Dairy Cluster — Hanford, CA
Multi-farm covered lagoon digester cluster serving 5 dairies in Kings County, with centralized biogas collection and pipeline injection for RNG production.
The Challenge
Problem
CalBio Enterprises needed covered lagoon digesters installed across 5 dairy operations in Kings County as part of a dairy cluster biogas project. Each farm had different lagoon dimensions, soil conditions, and existing infrastructure requiring customized engineering. The aggressive CDFA DDRDP grant timeline required all 5 installations to be completed within a single construction season to meet funding milestones.
Our Approach
Solution
EFI deployed a standardized-yet-customizable CLD installation program across all 5 dairy sites. Each system uses HDPE geomembrane covers with biogas collection headers tied into CalBio's centralized pipeline network. The modular approach allowed EFI to run overlapping installation crews across sites, completing all 5 digesters in 7 months. Each site includes individual gas flow monitoring feeding CalBio's central SCADA system.
Outcomes
Results & Metrics
Key Outcomes
- 5 dairy CLD systems installed in 7 months
- 42,000+ tCO2e captured across cluster annually
- Centralized pipeline connection at all sites
- CDFA DDRDP grant milestones met on schedule
- Standardized design cut per-site costs by 25%
- Individual site monitoring via central SCADA
“Five digesters in seven months — most contractors couldn't do one in that time. EFI's crew rotation model and standardized engineering made the cluster timeline possible.”
CalBio Operations Manager, CalBio Enterprises
Related Work
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