Double Membrane Biogas Holder for Biogas Digester Tank: The Functional Roof and Storage System for the Gas Co-product of Digestion

Double Membrane Biogas Holder for Biogas Digester Tank: The Functional Roof and Storage System for the Gas Co-product of Digestion

The Biogas Digester Tank is the core operational unit in any anaerobic digestion (AD) plant, serving to convert organic waste into stabilized digestate and the valuable gas co-product of digestion: biogas. The efficient and profitable operation of the entire facility relies on the immediate, secure capture, and management of this gas. Since biogas is produced at a low, variable pressure, the storage solution must be highly flexible and integrated directly at the point of production. Furthermore, the system must be functional, offering reliable performance and structural integrity to withstand continuous operation.

The Double Membrane Biogas Holder is the industry-recognized technology that meets these requirements. It is the functional roof and storage system for the gas co-product of digestion. By serving as the flexible dome over the digester tank, this holder performs a dual, integrated function: it provides a durable, gas-tight seal for the digester contents and simultaneously acts as a large, flexible reservoir. This system ensures every cubic meter of gas is captured, pressure fluctuations are safely managed, and a stable, continuous supply is maintained for downstream energy utilization.

Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), a global leader in advanced containment solutions, specializes in engineering high-performance storage systems. Our Double Membrane Biogas Holders are state-of-the-art gas holders designed to integrate perfectly with various digester tanks, offering superior gas containment, pressure regulation, and long-term durability.

Product Advantages of the Functional Integrated System

Center Enamel’s Double Membrane Biogas Holders are meticulously engineered to maximize the efficiency, safety, and operational functionality of biogas digester tanks. The flexible dome design provides distinct advantages over traditional rigid caps.

Integrated Functional Roof and Seal

The most significant functional benefit is the system's ability to act as the integrated flexible roof of the digester tank. This placement ensures maximum gas capture efficiency by collecting the gas immediately as it rises from the fermentation slurry. The system provides a crucial hermetic seal, preventing the escape of valuable biogas and odors while protecting the digester contents from atmospheric contamination. This gas-tight integrity is fundamental to maximizing energy yield and ensuring environmental compliance.

Dynamic Pressure and Volume Regulation

Biogas production rates are never constant, fluctuating with factors like temperature and feedstock quality. The balloon's core function is to provide dynamic pressure and volume regulation. The volume of the inner membrane dynamically expands and contracts to accommodate the natural volume fluctuations. This capability acts as a perfect buffer, regulating the head pressure on the digester contents, preventing stress on the tank structure, and ensuring a smooth, stable flow of gas to utilization equipment.

Superior Durability and Operational Visibility

The double-membrane architecture ensures exceptional structural resilience. The inner membrane securely contains the biogas, while the outer membrane is inflated with air to form a structurally rigid, protective dome. This outer shell shields the inner membrane and the gas beneath from external environmental stresses, including high winds, heavy snow loads, and ultraviolet (UV) radiation. Furthermore, the external dome provides a visible indicator of the stored gas volume, allowing operators to make proactive adjustments to energy management.

Company Advantages

Center Enamel’s standing as a premier global supplier is built on our deep technical expertise and commitment to quality. As a pioneering manufacturer of Glass-Fused-to-Steel (GFS) tanks in China, our company possesses decades of proven history in high-performance containment solutions. Our advanced production capabilities are backed by more than 20 patents in enameling technology and a dedicated research and development team focused on innovation.

Our dedication to quality is demonstrated through our strict adherence to international standards. Our products and processes conform to the most demanding international benchmarks, including standards for quality management, drinking water safety, and occupational health. These certifications provide an independent and verifiable guarantee of quality, safety, and compliance with the most stringent regulations, which is critical for successful operation in international markets. This commitment, combined with our proven global track record of successful projects in over 100 countries, makes us a reliable and expert partner for any biogas digester project.

Product Application Areas

Center Enamel's Double Membrane Biogas Holders are essential components across all sectors utilizing anaerobic digestion technology:

Biogas Digester Tank (Functional Roof/Storage): Used for instantaneous capture and buffering of biogas generated from manure, slurry, municipal sludge, or organic waste.

Agricultural and Livestock Wastewater Treatment: Essential for farms processing manure and agricultural residues, enabling stable on-site energy generation.

Industrial Wastewater and Food Waste Treatment: Capturing and storing biogas generated from high-strength organic effluent to offset high energy consumption.

Biomethane and Compressed Biogas (CBG) Plants: Providing the essential intermediary buffer storage before high-pressure purification and compression.

Global Reach and Proven Excellence: Project Cases

Our extensive portfolio of successful containment projects showcases our capability to engineer robust, sealed, and durable solutions—expertise directly applied to our high-performance biogas holders. The following non-fictitious cases demonstrate our global reach and technical excellence:

France Biogas Project: We supplied 1 tank with a total capacity of 2,215 cubic meters for a biogas project in France, demonstrating our capacity to deliver high-integrity solutions for European renewable energy markets.

Beijing Fengtai Food Waste Treatment Project: We provided 3 tanks with a total capacity of 5,244 cubic meters for a food waste treatment facility in Beijing, highlighting our role in sustainable waste-to-energy solutions crucial for biogas production.

Muyuan Group Jiangsu Lianyungang Livestock Wastewater Project: For a major agricultural client, we supplied 7 tanks with a total capacity of 10,360 cubic meters for a livestock wastewater project, demonstrating our expertise in large-volume, sealed agricultural containment critical for biogas management.

Conclusion

For Biogas Digester Tanks, the Double Membrane Biogas Holder is the optimal, most functional solution. By providing the functional roof and storage system for the gas co-product of digestion, it ensures the complete capture and effective pressure stabilization of the methane-rich fuel. Our systems empower AD operators to maximize gas output, ensure stable energy utilization, and drive their facilities toward greater sustainability and profitability with a reliable, integrated solution.