Case Study

SC Pet — H2S Characterization & O2 Injection

Comprehensive H2S characterization study followed by O2 injection system installation at a pet food processing wastewater facility, demonstrating 78-83% H2S reduction.

14,000 ppm

Baseline H2S

2,400 ppm

Benchtop H2S

78%

H2S Reduction (Wet Chem)

Client

GreenGas USA

Location

South Carolina

Completed

2023

Industry

Pet Food Processing

System Type

H2S Study + O2 Injection System

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.

H2S Characterization StudyBenchtop TestingWet Chemistry AnalysisO2 Injection SystemPerformance Verification

Outcomes

Results & Metrics

14,000 ppm

Baseline H2S

2,400 ppm

Benchtop H2S

78%

H2S Reduction (Wet Chem)

83%

H2S Reduction (Bench vs Field)

7,600 mg/kg

Pre-Treatment Sulfur

160,000 mg/kg

Post-Treatment Sulfate

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 Processing

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Results & Metrics

14,000 ppm

Baseline H2S

2,400 ppm

Benchtop H2S

78%

H2S Reduction (Wet Chem)

83%

H2S Reduction (Bench vs Field)

7,600 mg/kg

Pre-Treatment Sulfur

160,000 mg/kg

Post-Treatment Sulfate

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

SC Pet — H2S Characterization & O2 Injection

Problem

Solution

Results & Metrics

Key Outcomes

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SC Pet — H2S Characterization & O2 Injection

Problem

Solution

Results & Metrics

Key Outcomes

Similar Projects

Perdue Farms — Lewiston, NC

SunMaid Growers — Kingsburg, CA

JBS — Worthington, MN

Have a Similar Project?