Case Study
Oliveira Dairy — O2 Addition with Mixer Controls
O2 injection system with mixer controls added to Oliveira Dairy's covered lagoon digester project, including skid and precision flow measurement.
The Challenge
Problem
The Oliveira Dairy covered lagoon digester project was already underway for liner and cover installation when the need for H2S reduction became apparent. Adding O2 injection to an active construction site required careful coordination with the ongoing liner and cover work, plus integration of mixer controls for optimal oxygen distribution.
Our Approach
Solution
EFI added the O2 system as Change Order #2 to the existing project (Job 23788), including an O2 skid, mixer control panels, rotameters for precision flow measurement, and an O2 flow meter box. The injection point locations were designed to work with the existing covered lagoon geometry and mixer placement for maximum contact time between oxygen and the biogas-producing liquid.
Outcomes
Results & Metrics
Key Outcomes
- O2 injection seamlessly integrated into active liner/cover project
- Mixer control panels for optimized oxygen distribution
- Rotameter-based precision flow measurement installed
- Construction progressing through March 2026
- Coordinated O2 skid placement with existing site layout
“Adding O2 injection mid-project could have been a headache, but EFI integrated it cleanly into the existing scope.”
Maas Energy Works Site Supervisor, Aemetis / Maas Energy Works
Related Work
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