In the global shift toward renewable energy, efficient biogas management is critical for maximizing the ROI of anaerobic digestion facilities. As a leading China Double Membrane Biogas Storage Balloon Manufacturer, Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) engineers high-performance, low-pressure containment solutions that ensure energy security and operational excellence.
Center Enamel’s systems provide high methane retention and structural resilience. Use the data below for project planning and procurement.
Parameter | Specification Range | Engineering Significance |
Operating Pressure | 20 mbar – 50 mbar | Optimized for low-pressure AD systems. |
Temperature Resistance | -30°C to +70°C | Resilience in arctic to tropical climates. |
Methane Permeability | < 400 cm3/m2. d .bar | Minimizes gas loss; maximizes energy yield. |
Volume Capacity | 50 m3 to 10,000 m3+ | Scalable from pilot to industrial projects. |
Design Life | 20+ Years | High UV and H2S resistance for long-term ROI. |
The core of our Double Membrane Gas Holder is a dual-layer system constructed from high-tensile, PVC-coated polyester fabric.
● Inner Membrane (Gas-Holding): Formulated for methane impermeability and H2S resistance. It dynamically adjusts to gas volume, ensuring a hermetically sealed environment.
● Outer Membrane (Protective Dome): A UV-stabilized biogas membrane maintained by an explosion-proof blower system. It shields the inner tank from wind, rain, and snow.
● Safety Systems: Includes integrated gas leakage detection and high-precision pressure relief valves to maintain a safe operating range.
In the high-stakes biogas industry, compliance with international codes is mandatory for safety and insurance.
Standard / Code | Technical Focus | Impact on Project Safety |
DIN 4102-B1 | Flame Retardancy | Certified low-flammability; prevents fire spread. |
DIN 1055 | Wind & Snow Loading | Ensures structural stability in extreme weather. |
ISO 9001:2015 | Production Quality | Verifiable audit trail for material and weld strength. |
ATEX / CE | Explosion Protection | Blowers and sensors certified for Zone 1 & 2 environments. |
Eurocode 3 | Structural Integrity | Seismic-resistant anchoring for high-capacity systems. |
Feature | Stand-alone Balloon | Digester-mounted Cover |
Best For | Large storage (5,000 m3+). | Space-constrained sites. |
Maintenance | High accessibility; independent of tank. | Requires tank downtime for roof service. |
CAPEX | Higher (Requires foundation). | Lower (Dual-purpose roof/storage). |
Feature | Double Membrane Balloon | Traditional Steel Gas Holder |
Corrosion Risk | Zero (Inert to H2S). | High (Acidic corrosion). |
Installation | 3–5 Days (Modular). | 4–8 Weeks (Welding/Heavy Lifting). |
Total Cost | Low TCO; minimal maintenance. | High; requires frequent recoating. |
Our distinction as a premier manufacturer is evidenced by non-fictitious projects in our global biogas case library:
● Jiangsu Xuzhou Project: 4 units, total capacity 30,532 m3.
● Inner Mongolia Hinggan League: 4 units, total volume 16,760 m3.
● Sweden Biogas Project: 1 unit, 5,510 m3, meeting stringent EU environmental standards.
● Shandong Heze Project: 2 units, 15,266 m3, supporting large-scale municipal waste.
How long does a biogas balloon last?
With UV-stabilized and H2S-resistant materials, the design life is 20 to 25 years, depending on proper air-blower maintenance and tensioning.
What is the difference between inner and outer membranes?
The inner layer is the gas-tight storage vessel (methane-focused), while the outer layer is a structural shell kept inflated to protect the system from wind, snow, and UV.
How is the gas level measured?
We utilize ultrasonic level sensors or physical cable-pull sensors that send a 4-20mA signal to the plant's PLC for real-time monitoring.
How does it handle extreme weather?
Our designs comply with DIN 1055, using air-support blowers to increase internal pressure during storm events, ensuring the dome remains aerodynamically stable.
