Case Study
Blue Sky Dairy — O2/Air Injection System
O2 and air injection system evaluation for Blue Sky Dairy's covered lagoon project, added as a change order with budget comparison analysis.
The Challenge
Problem
Blue Sky Dairy's new covered lagoon digester project needed H2S reduction capability but the optimal approach — pure O2 injection vs. air injection — was not immediately clear. The client needed a data-driven comparison of both approaches considering capital cost, operating cost, and impact on downstream biogas quality.
Our Approach
Solution
EFI developed detailed budget estimates for both O2 and air injection approaches (v3 and v4 with side-by-side comparison), enabling an informed decision. The selected system was added as Change Order #1 to the existing covered lagoon liner and cover project, minimizing mobilization costs and schedule impact.
Outcomes
Results & Metrics
Key Outcomes
- Detailed O2 vs. air injection budget comparison provided
- System integrated as change order to existing cover project
- Currently in estimating/change order phase as of March 2026
- Covered lagoon construction drawings completed
“Having both options priced out side by side made the decision easy. EFI gave us the data we needed to make the right call for our operation.”
Lewis Biofuels Project Lead, Lewis Biofuels / Hartman
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