Biogas Membrane / Biogas Digester Liner
Overview
DERFLEX’s Biogas Membrane is specially engineered for biogas plants, anaerobic digesters, farm biogas systems, landfill gas collection, and other methane-producing applications. Made from high-quality PVC or TPU coated fabric, our membrane provides excellent gas tightness, chemical resistance, UV resistance, and long service life, ensuring reliable performance even under harsh conditions.
Key Features & Benefits
- Gas-tight & Leak-proof: Designed to prevent biogas leakage, ensuring maximum methane capture and safe operation.
- Durable & Long-lasting: Resistant to UV, oxidation, chemicals and microbial attack — suitable for outdoor and underground digesters.
- Flexible & Easy Installation: Available in large-width rolls or custom-cut panels; compatible with welded seams and anchoring systems.
- Customizable: Thickness, width, color, backing material, and coatings can be customized per your project specifications.
- Low Maintenance: Once installed, the membrane requires minimal maintenance — ideal for large-scale biogas plants.
Technical Specifications
| Parameter | Typical Value / Range | Unit |
|---|---|---|
| Material | PVC-coated polyester / TPU-coated fabric | - |
| Fabric weight (gsm) | 650 – 1200 | gsm |
| Total thickness | 0.9 – 2.0 | mm |
| Tensile strength (warp/weft) | ≥ 1500 / ≥ 1400 | N / 5 cm |
| Elongation at break (warp/weft) | ≥ 15 / ≥ 15 | % |
| Tear strength | ≥ 300 / ≥ 300 | N |
| Gas impermeability | ≤ 0.02 | ml / (m²·h·bar) |
| UV resistance (color & strength retention) | ≥ 2000 hours (QUV test) | hours |
| Operating temperature | -30 ~ +80 | °C |
Applications
- Biogas plants (agricultural, municipal waste, landfill gas)
- Anaerobic digesters for livestock farms, food waste processing plants
- Landfill gas collection & containment systems
- Agricultural slurry storage and digesters
- Biomethane production & gas storage systems
OEM / Customization Services
DERFLEX offers flexible customization options to meet your project requirements, including custom width, length, thickness, backing fabric, coating type (PVC or TPU), color, and printing or labeling. Whether you need small batches for pilot plants or large orders for industrial-scale digesters, we can accommodate and deliver fast. Contact us for a quote and project consultation.
Installation & Handling
Proper installation is critical to ensure gas-tightness and long service life:
- Ensure the base surface is clean, dry, and smooth (no sharp stones or debris) before laying the membrane.
- Weld seams using hot-air welding machines when PVC; for TPU, follow TPU welding or bonding procedures as per your project specs.
- Install anchoring and protective measures (e.g. geotextile cushion, drainage layer) if used in landfill or biogas pit applications.
- Avoid direct contact with sharp objects, heavy machinery, or concentrated chemical leaks to extend service life.
Frequently Asked Questions (FAQ)
Q: What is the difference between PVC and TPU biogas membranes?
A: PVC-coated fabric is cost-effective and widely used, with good gas-tightness and durability under normal conditions. TPU-coated fabric offers better chemical resistance, lower gas permeability and longer lifespan — suitable for harsh environments or high-demand applications.
Q: Can DERFLEX supply custom sizes for large-scale digesters?
A: Yes. DERFLEX supports custom width, length, thickness and backing to match your project specs, whether for small farm digesters or large industrial biogas plants.
Q: How do you ensure gas-tightness and quality of the membrane?
A: We perform strict quality control including raw material inspection, coating uniformity, tensile and tear strength tests, gas permeability testing, and welding/seam integrity checks. Each batch is inspected before dispatch.
Q: How to store the membrane before installation?
A: Store in a cool, dry, shaded warehouse. Avoid direct sunlight, high temperature, sharp edges or heavy load on the rolls. Normally shelf life is 6–12 months without performance degradation if stored properly.
Get a Quote / Contact Us
Interested in DERFLEX Biogas Membrane? Contact our sales team with your project specifications (digester size, required thickness, coating type, quantity, delivery address) and we will provide you with a competitive quote and technical support.
Why Choose DERFLEX
DERFLEX is a professional manufacturer focusing on PVC tarpaulin, coated fabrics and industrial membranes for more than two decades. Our products are exported to dozens of countries worldwide, and we maintain a strict quality control system and provide OEM/ODM services for customized orders. With years of experience, a dedicated R&D team and reliable factory capabilities, we guarantee that our biogas membrane meets international standards and delivers stable performance for your biogas projects.
