Reduce biogas H₂S to <1 ppm with our ASME/DOT-certified desulfurization units. Trusted by 40+ countries, delivered in 45 days. Free pilot testing for qualified projects.
Biogas is a game-changer for renewable energy, but H₂S (hydrogen sulfide) contamination can turn your investment into a liability. According to the IEA’s 2025 Biogas Report, corrosion and sulfur poisoning account for 42% of biogas plant failures globally. Here’s what’s at stake:
H₂S concentrations >50 ppm accelerate pipeline and engine corrosion, leading to $500K+ in annual maintenance costs (Source: EPA Biogas Guidelines 2024).
Even 10 ppm H₂S can deactivate palladium catalysts in CHP systems, reducing efficiency by 30-40% (MIT Energy Study, 2023).
EU and US biogas standards require H₂S < 5 ppm for grid injection. Non-compliance risks fines up to $100K/day (EPA 40 CFR Part 60).
H₂S at >250 ppm is toxic and flammable. Poor desulfurization risks OSHA violations and workplace accidents.
Inefficient desulfurization media (e.g., iron sponge) requires frequent replacements, increasing OPEX by 20-30% annually.
Unplanned shutdowns due to H₂S buildup cost $10K–$50K per day in lost revenue for landfill/AD plants.
Your current solution isn’t cutting it. Traditional methods like iron sponge, caustic scrubbing, or biological desulfurization either:
Shijiazhuang Enric Gas’s biogas desulfurization systems solve these problems with 99.9% H₂S removal efficiency, zero waste discharge, and 5-year media lifespan.
For over 50 years, Shijiazhuang Enric Gas Equipment Co., Ltd. (a subsidiary of CIMC Group) has engineered high-pressure gas processing solutions for the world’s most demanding industries. Our biogas desulfurization units are deployed in 40+ countries, from US landfills to European AD plants.
| Feature | Enric Gas | Iron Sponge | Biological Scrubbing | Caustic Wash |
|---|---|---|---|---|
| H₂S Removal Efficiency | 99.9% (<1 ppm) | 85-90% (10-50 ppm) | 90-95% (5-10 ppm) | 95% (5-20 ppm) |
| Media Lifespan | 5+ years | 3-6 months | 2-3 years (with maintenance) | 1-2 years |
| Waste Generation | Zero (regenerative) | Hazardous sulfur sludge | Biomass waste | Caustic wastewater |
| OPEX (Annual) | $5K–$15K | $20K–$50K | $15K–$30K | $30K–$60K |
| Maintenance | Fully automated | Weekly media replacement | Monthly monitoring | High (chemical handling) |
| Scalability | 100–50,000 Nm³/h | Limited (<5,000 Nm³/h) | Moderate (<10,000 Nm³/h) | Moderate (<10,000 Nm³/h) |
| Certifications | ASME, DOT, CE, ISO 9001 | None | Limited | None |
Our systems use proprietary activated carbon and catalytic oxidation to achieve unmatched purity. Below are the specs for our flagship EG-BDS Series:
| Model | Flow Rate (Nm³/h) | Inlet H₂S (ppm) | Outlet H₂S (ppm) | Pressure Drop (mbar) | Media Volume (m³) | Lifespan (Years) | Power (kW) |
|---|---|---|---|---|---|---|---|
| EG-BDS-100 | 100–500 | Up to 5,000 | <1 | <5 | 0.1–0.5 | 5–7 | 0.5 |
| EG-BDS-1000 | 500–2,000 | Up to 10,000 | <1 | <10 | 0.5–1.5 | 5–7 | 1.5 |
| EG-BDS-5000 | 2,000–10,000 | Up to 15,000 | <1 | <15 | 2–4 | 5–7 | 3.0 |
| EG-BDS-20000 | 10,000–50,000 | Up to 20,000 | <1 | <20 | 5–10 | 5–7 | 5.0 |
EG-BDS Series assembly line at Shijiazhuang Enric Gas Equipment Co., Ltd.
Our systems are trusted by municipalities, energy producers, and industrial facilities worldwide:
Challenge: 20,000 Nm³/h landfill gas with 12,000 ppm H₂S required <1 ppm for RNG upgrade.
Solution: 2x EG-BDS-20000 units in parallel.
Result: 99.99% H₂S removal, $2M/year savings in maintenance costs.
Challenge: Agricultural biogas with 3,000 ppm H₂S causing engine corrosion.
Solution: EG-BDS-5000 with heat recovery.
Result: Zero downtime in 3 years; CE-certified for EU grid injection.
Challenge: Sewage biogas with 8,000 ppm H₂S and high moisture content.
Solution: EG-BDS-1000 + integrated dryer.
Result: Consistent <1 ppm H₂S; ASME-certified for export.
Left: EG-BDS Series production line. Right: Rigorous quality testing.
Compliant with: EU EN 16723-2, US ASTM D7846, China GB/T 40008-2021, and local regulations in 40+ countries.
"Enric Gas’s desulfurization system reduced our H₂S from 8,000 ppm to <1 ppm without any downtime. The 5-year media lifespan saved us $150K/year in replacements."
"We needed a CE-certified solution for our German AD plant. Enric Gas delivered a turnkey system in 6 weeks—2x faster than European suppliers."
"The automated regeneration feature eliminated our hazardous waste disposal costs. A game-changer for our landfill gas project."
Our EG-BDS Series can treat biogas with H₂S levels from 10 ppm to 20,000 ppm. For concentrations >20,000 ppm, we offer custom multi-stage systems.
We use a 3-stage process:
The sulfur is stored on-site and can be sold as a byproduct (agricultural/industrial use).
Standard models (EG-BDS-100 to EG-BDS-5000): 45 days from order confirmation.
Custom systems (EG-BDS-20000+): 90–120 days, including engineering and certification.
Expedited delivery available for urgent projects (surcharge applies).
Yes! We provide full OEM/ODM customization, including:
2-year warranty on all components, including:
Extended warranties (up to 5 years) available for service contracts.
We provide 3 options:
Training includes: Operation, maintenance, troubleshooting, and H₂S safety protocols.
Based on a 5,000 Nm³/h biogas plant with 5,000 ppm H₂S:
| Cost Factor | Iron Sponge (Annual) | Enric Gas (Annual) | Savings |
|---|---|---|---|
| Media Replacement | $40,000 | $0 | $40,000 |
| Waste Disposal | $15,000 | $0 | $15,000 |
| Maintenance Labor | $25,000 | $5,000 | $20,000 |
| Downtime Costs | $30,000 | $0 | $30,000 |
| Total Savings | $110,000/year |
Payback period: 1.5–2.5 years for most projects.
Yes! We provide free pilot testing for qualified projects. Here’s how it works:
Contact us to schedule a pilot test.
"We installed Enric Gas’s EG-BDS-5000 at our RNG production facility. The system exceeded our expectations—H₂S levels dropped from 2,500 ppm to 0.5 ppm consistently. The automated controls saved us 20 hours/week in manual monitoring. Highly recommended!"
"Other suppliers promised low H₂S but failed under real-world conditions. Enric Gas’s system delivered from day one. The CE certification made compliance a breeze. Their team even trained our staff on-site at no extra cost."
"In the Middle East, heat and humidity are major challenges for gas equipment. Enric Gas’s EG-BDS-1000 handled our 40°C ambient temperatures without issues. The stainless steel construction prevents corrosion—critical for our coastal location."
Real Conversations with Our Clients:
Limited-time offer: Order before June 30, 2026 and get:
Zero risk: 30-day money-back guarantee if H₂S >1 ppm.
Contact us:
Senior Biogas Engineer | Shijiazhuang Enric Gas Equipment Co., Ltd.
Dr. Zhang Wei holds a Ph.D. in Chemical Engineering from Tsinghua University and has 20+ years of experience in gas purification and desulfurization. As the lead engineer for Enric Gas’s EG-BDS Series, he has designed systems for 50+ biogas projects globally. His work has been published in Journal of Cleaner Production and Renewable Energy. He is also a member of the International Gas Union (IGU) and a certified ASME pressure vessel inspector.
-Hengkai Natural Gas Liquefaction Project
-Changming Phase II Natural Gas Liquefaction Project
-Hwange Natural Gas Liquefaction Project
-Tianhao Coalbed Methane Liquefaction Project
-Tianyun Coalbed Methane Liquefaction Project
-Shuntai Coalbed Methane Liquefaction Project
-60.000 cubic meters/day
-60.000 cubic meters/day
-60.000 m3/day*2 sets
-200.000 cubic meters/day
