Case Study
SC Pet — H2S Characterization & O2 Injection
H2S characterization study and O2 injection system at a pet food processing wastewater facility, demonstrating 78-83% H2S reduction in biogas.
The Challenge
Problem
The SC Pet facility's two covered anaerobic digesters produced biogas with extremely high H2S concentrations — measured at 14,000 ppm in field testing. This level was causing severe corrosion of gas handling equipment and made the biogas unsuitable for energy recovery without extensive pretreatment.
Our Approach
Solution
EFI partnered with Blue Green Services to conduct a multi-phase H2S characterization study: benchtop testing, in-field measurement, and wet chemistry analysis. The study confirmed 78-83% H2S reduction was achievable with O2 injection. Based on the results, EFI installed a full O2 injection system in September 2023.
Outcomes
Results & Metrics
Key Outcomes
- 78% H2S reduction demonstrated via wet chemistry analysis
- 83% reduction confirmed in benchtop vs. field testing comparison
- Baseline H2S reduced from 14,000 ppm to projected 3,080 ppm post-treatment
- Complete characterization study with sulfur and sulfate measurements
- O2 injection system installed and operational
“The phased approach — study first, then install — gave us the data we needed to justify the investment. The results exceeded the study projections.”
Facility Operations Manager, GreenGas USA
Related Work
Similar Projects
Poultry / Food ProcessingPerdue Farms — Lewiston, NC
Food Processing / AgricultureSunMaid Growers — Kingsburg, CA
Food ProcessingJBS — Worthington, MN
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