TPU Double-Membrane Covers for Biogas Storage Domes and Digesters
High-Performance Biogas Membrane Systems by DERFLEX
Overview of TPU Double-Membrane Biogas Storage Systems
TPU double-membrane covers are advanced flexible membrane systems specifically engineered for biogas storage domes and anaerobic digesters. These systems play a critical role in modern renewable energy infrastructure by enabling safe, efficient, and continuous storage of biogas generated during anaerobic digestion processes.
As a professional manufacturer and global supplier, DERFLEX develops high-performance TPU double-membrane covers that deliver superior gas-tightness, chemical resistance, UV stability, and long-term mechanical durability. Our membranes are widely used in agricultural biogas plants, industrial waste treatment facilities, municipal wastewater digesters, and large-scale renewable energy projects worldwide.
The double-membrane design consists of an inner gas-tight membrane and an outer protective membrane. This structure ensures stable gas pressure, enhanced safety, and extended service life even under harsh environmental conditions.
What Is a TPU Double-Membrane Cover?
A TPU double-membrane cover is a flexible gas holder system composed of two separate but integrated membrane layers:
- Inner membrane – gas-tight TPU membrane for biogas storage
- Outer membrane – weather-resistant TPU membrane for environmental protection
TPU (Thermoplastic Polyurethane) is chosen for its exceptional elasticity, high tear resistance, excellent chemical compatibility with biogas components, and long-term resistance to UV radiation and weathering.
Why Choose TPU Material for Biogas Storage Domes?
Superior Gas Tightness
Gas impermeability is one of the most critical performance indicators for biogas storage systems. DERFLEX TPU membranes feature extremely low gas permeability, ensuring minimal methane loss and maximizing energy efficiency.
Excellent Chemical Resistance
Biogas contains methane, carbon dioxide, hydrogen sulfide, and moisture. TPU membranes offer outstanding resistance to these aggressive components, preventing material degradation over time.
High Elasticity & Flexibility
TPU membranes maintain flexibility across a wide temperature range, allowing stable operation under varying gas pressures without cracking or mechanical fatigue.
Long-Term UV & Weather Resistance
The outer membrane is specially formulated with UV stabilizers to withstand prolonged exposure to sunlight, rain, wind, and temperature fluctuations.
Structure of TPU Double-Membrane Biogas Covers
DERFLEX double-membrane systems are engineered with precision-controlled layers:
- High-strength polyester base fabric
- TPU coating on both sides
- Optional anti-microbial and anti-static treatments
- Reinforced welding seams
This multilayer construction provides optimal balance between strength, flexibility, and gas tightness.
Technical Specifications of DERFLEX TPU Biogas Membranes
| Parameter | Specification Range |
|---|---|
| Base Fabric | High Tenacity Polyester |
| Coating Material | Thermoplastic Polyurethane (TPU) |
| Total Weight | 900gsm – 1600gsm |
| Thickness | 0.8mm – 1.5mm |
| Gas Permeability | Extremely Low |
| Operating Temperature | -40°C to +70°C |
| UV Resistance | ≥ 10–15 Years Outdoor Exposure |
| Flame Retardancy | Optional (EN / DIN Standards) |
Applications of TPU Double-Membrane Covers
- Agricultural biogas plants
- Industrial anaerobic digesters
- Municipal wastewater treatment facilities
- Organic waste and food waste digesters
- Renewable energy biogas power plants
Manufacturing Process & Quality Control
DERFLEX controls the entire production chain of TPU biogas membranes, including raw material selection, coating formulation, precision coating, curing, high-frequency welding, and final inspection.
Each membrane is tested for gas tightness, tensile strength, tear resistance, seam strength, UV aging, and chemical resistance before delivery.
Installation & Engineering Support
DERFLEX TPU double-membrane covers are designed for easy installation and compatibility with different biogas dome structures. We provide detailed installation guidance and technical documentation to engineering contractors and project owners.
OEM & Custom Biogas Membrane Solutions
As an experienced biogas membrane manufacturer, DERFLEX offers OEM and fully customized solutions, including:
- Custom sizes and dome diameters
- Customized membrane weights and thickness
- Special chemical resistance formulations
- Private labeling for EPC contractors
Why DERFLEX for Biogas Double-Membrane Systems?
- Factory-direct manufacturer
- Proven performance in global biogas projects
- Strict quality control and testing
- Strong R&D and material engineering capability
- Global logistics and export experience
Frequently Asked Questions
What is the service life of TPU double-membrane biogas covers?
DERFLEX TPU biogas membranes are designed for a service life of 10–15 years under normal operating conditions.
Is TPU suitable for methane storage?
Yes. TPU offers excellent gas tightness and chemical compatibility with methane-rich biogas.
Can DERFLEX provide custom biogas membrane solutions?
Yes. DERFLEX supports full customization for biogas storage dome and digester membrane projects.