Fully inflated spherical red mud biogas balloon for farm digester
Close up of double layer reinforced seam on red mud biogas storage balloon
Stainless steel flange and ball valve on flexible biogas gas holder
Fully inflated spherical red mud biogas balloon for farm digester

2.5m3 Flexible Biogas Storage Bags for Low Pressure Methane

Bancy's flexible biogas storage bags provide a safe, cost-effective solution for capturing excess methane. Engineered with double-layer reinforced seams, our bags offer superior gas-tightness for low-pressure digester systems, ensuring your renewable energy never goes to waste.

Specifications of Flexible Biogas Storage Bags

Parameter
Specifications
Product Name
Flexible Biogas Storage Bag (Low-Pressure Methane Holder)
Material
0.9mm Heavy-Duty PVC / Red Mud PVC (Highly Recommended)
Color
Red (Standard for Red Mud), Grey, Black, Custom Colors Available
Capacity Range
1m³ to 500m³ (Custom Sizes Supported)
Working Pressure
Low Pressure Application: < 3 kPa
Application
  • Anaerobic Digester Systems
  • Livestock Manure Energy Recovery
  • Rural & Home Biogas Systems
  • Waste-to-Energy Projects
  • Industrial Off-Gas Buffer Storage
Key Advantages
  • 99% Gas-Tight Retention: Exclusive Double-Layer Reinforced Welding prevents methane leakage
  • Low-Pressure Safety: Reliable buffer to stabilize gas flow for stoves/generators
  • Highly Foldable: Low shipping costs, easy deployment without heavy machinery
  • Weatherproof: Excellent anti-corrosion & UV resistance for long-term outdoor use
Working Temperature
-30℃ to 70℃
Standard Accessories
1/2" or 3/4" Gas Ball Valve (Inlet/Outlet), Safety Air-Vent (Optional)
Custom valve sizes available for your digester pipeline
OEM Service
Logo Printing, Custom Dimensions & Thickness
Simple schematic drawings provided for pre-production confirmation
Service Life
7-10+ Years Under Normal Outdoor Use

Biogas Storage Bags Product Gallery

Fully inflated spherical red mud biogas balloon for anaerobic digester systems in factory.

Spherical Red Mud Biogas Balloon

Close up of reinforced tie-down anchor loops on a flexible red mud biogas holder.

Heavy-Duty Tie-Down Anchors

Detailed view of the black double-layer reinforced welded seam on red mud biogas fabric.

99% Leak-Proof Double Welding

Stainless steel ball valve and heavy-duty metal flange installed on a biogas storage bag.

Industrial-Grade Gas Valve & Flange

Inflated flexible methane gas holder undergoing pressure testing in Bancy manufacturing facility.

Factory-Tested Methane Storage

Versatile Applications for Biogas Storage Bags

Livestock & Poultry Farms: Biogas Storage Bags for Waste-to-Energy

Livestock farms generate massive amounts of manure daily, which is an excellent source of biogas through anaerobic digestion. Our flexible biogas storage bags act as a crucial low-pressure buffer. They safely store the excess methane produced during peak fermentation times, ensuring a steady and reliable gas supply to power farm generators, heat barns, or fuel boilers, drastically reducing the farm’s electricity costs.

Domestic Biogas Storage Bags for Rural Off-Grid Communities

Industrial food processing, breweries, and slaughterhouses produce high volumes of organic wastewater. When treated in anaerobic reactors, this effluent generates valuable biogas. Bancy’s Red Mud biogas balloons provide a secure, corrosion-resistant containment solution to capture this off-gas. By buffering the gas pressure, factories can efficiently feed the recovered methane back into their factory burners or CHP (Combined Heat and Power) systems.

Palm Oil Mills & Agro-Processing Facilities

Agro-industrial facilities, particularly Palm Oil Mills (treating POME – Palm Oil Mill Effluent) or tapioca starch factories, are massive producers of biogas. Our heavy-duty, UV-resistant spherical gas holders are engineered to withstand the harsh, tropical outdoor environments typical of these industries. They provide large-scale, scalable buffer storage to prevent gas flaring and maximize renewable energy utilization.

Rural Off-Grid Communities & Domestic Systems

For remote villages and eco-communities without access to natural gas grids, small-scale household digesters are life-changing. Our customized, compact biogas bags safely store purified methane from kitchen waste or small animal pens. This provides rural families with a consistent, low-pressure supply of clean cooking fuel, eliminating the health hazards of burning firewood and reducing deforestation.

Municipal Solid Waste (MSW) & Landfill Gas Recovery

Landfills and municipal organic waste treatment centers emit potent greenhouse gases. Our double-layer welded biogas storage bags offer an eco-friendly containment solution to harvest this landfill gas. By securely capturing the methane before it escapes into the atmosphere, environmental projects can convert community waste into sustainable electricity while strictly complying with emission regulations.

Greenhouse Heating & Agricultural Operations

During colder months, maintaining optimal temperatures in commercial greenhouses is extremely energy-intensive. Farms utilizing anaerobic digesters can store their generated biogas in our flexible gas holders during the day. At night, the stored gas is steadily fed into biogas boilers to heat the greenhouses, creating a completely self-sustaining and circular agricultural ecosystem.

Frequently Asked
Questions

Answers to common queries regarding installation and materials.

How do you ensure the biogas bag doesn't leak methane?

Methane molecules are highly volatile, making gas storage much more demanding than water storage. That is why we do not use standard single welds. Bancy utilizes an exclusive Double-Layer Reinforced Welding Technology. By applying an extra strengthening strip over every seam, we provide a 99% gas-tight retention rate, ensuring maximum safety and preventing valuable energy loss.

Absolutely. For outdoor applications, we highly recommend our Red Mud PVC material. This industrial-grade fabric offers 3x the UV resistance of standard PVC, preventing the material from degrading or cracking under intense sunlight. Furthermore, the red color effectively absorbs solar heat, which helps maintain internal temperature and pressure stability.

Yes, high flexibility is our core advantage. We can manufacture customized shapes (spherical, rectangular, or cylindrical) and exact dimensions to perfectly fit your site’s footprint. Moreover, we can customize the size and placement of the gas inlet/outlet valves to match your existing anaerobic digester pipeline seamlessly.

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Company Advantages

Why Choose Bancy

As a direct source factory with 20+ years of manufacturing expertise, Bancy Solutions excels in delivering leak-proof, durable, and cost-effective liquid storage solutions. Our advantage lies in unique Double-Layer Reinforced Seam Technology ensuring superior reliability and longevity, backed by CE Certification.

Source Factory Direct

 

Direct from our factory floor to your site. Eliminate middlemen for competitive wholesale pricing and complete control over customization. With 5 production lines, we ensure rapid order fulfillment.

 

Our proprietary Dual-Layer Welding technology creates seams that are stronger than the fabric itself. Combined with High-Frequency welding for TPU, we guarantee a zero-leakage performance for critical liquids.

 

Certified by ISO 9001 and CE. Our products meet international safety standards, ensuring smooth customs clearance and reliable performance in over 50 countries worldwide.

 

From 500L to 500,000L, we engineer tanks to fit your exact specifications. Custom dimensions, specialized fittings (Camlock/NPT), and material selection (TPU/PVC) are our specialty.

Certifications

CE Certificate

CE Certificate

TUV Verified

TUV Verified

CCIC Inspection Report

CCIC Inspection Report