Case Study
Aemetis Borba Dairy — Skidded O2 System
Packaged skidded O2 injection system for a single dairy digester, featuring an integrated compressor, dryer, filters, and AirSep oxygen generator on one skid.
The Challenge
Problem
Aemetis needed an H2S reduction system for their Borba Dairy covered lagoon digester in Hilmar, California. The system needed to be compact, easy to install, and scalable — the initial design called for 2 SCFM but the dairy's biogas production required a larger capacity before installation was complete.
Our Approach
Solution
EFI designed a fully packaged skid system including compressor, oil/water separator, dryer, filters, AirSep oxygen generator, receivers, tubing, and single-point power panel. When biogas volumes proved higher than initially estimated, EFI executed Change Order #1 to upgrade from 2 SCFM to 3 SCFM O2 generator capacity — a 50% increase handled with minimal schedule impact.
Project Photos
Gallery
Outcomes
Results & Metrics
Key Outcomes
- Complete packaged O2 system on single skid — minimal site work required
- Successfully upgraded from 2 to 3 SCFM mid-project via change order
- Full submittal package with PID, electrical one-line, and controller drawings
- Single-point power connection simplifies installation
- Installation in progress as of March 2026
“The skidded approach made this straightforward. When we needed more capacity, EFI handled the upgrade without derailing the schedule.”
Aemetis Project Manager, Aemetis Biogas LLC
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