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

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

The efficiency of an anaerobic digestion (AD) facility is measured by its dual output: the stabilization of organic waste and the successful recovery of biogas, the valuable gas co-product of digestion. Within the Digester Tank, organic materials are continuously converted, yielding a low-pressure gas flow that is inherently variable due to biological fluctuations. To fully capitalize on this renewable fuel for energy generation or upgrading, the gas must be captured instantly, stored securely, and stabilized into a constant supply. Furthermore, the storage system must be functional, providing easy operational control and visibility to the plant's operators.

The Double Membrane Biogas Holder is the industry-recognized technology that meets these requirements. It is the functional and visible storage system for the gas co-product of digestion. By serving as the flexible dome over the digester tank, this holder performs three essential functions: it seals the digester contents, dynamically buffers the gas volume and pressure, and provides an immediate, visual indicator of the stored gas reserve, which is crucial for efficient plant management.

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 a superior, visible, and safe gas containment solution.

Product Advantages of the Functional Storage System

Center Enamel’s Double Membrane Biogas Holders are meticulously engineered to maximize the efficiency, safety, and operational control of digester tanks. The flexible dome design provides distinct advantages for AD facilities.

Visible Gas Volume and Operational Control

A key functional advantage is the visible indicator of the stored gas volume provided by the external membrane. Operators can quickly and easily assess the current gas reserve by observing the height or inflation level of the dome. This feature is vital for operational control, allowing managers to proactively adjust the rate of gas utilization (e.g., generator run-time) or the digester's feeding schedule based on the real-time gas balance, thereby preventing costly flaring or system shutdowns.

Integrated Capture and Pressure Stabilization

The system acts as the integrated flexible roof of the digester tank, ensuring maximum gas capture efficiency by collecting the gas instantly as it is produced. The volume of the inner membrane dynamically expands and contracts to accommodate the natural fluctuations in biogas production. This acts as a perfect buffer, stabilizing internal pressure to prevent stress on the tank structure and ensuring a smooth, stable flow of gas to downstream equipment.

Superior Durability and Safety

The double-membrane architecture provides exceptional 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 strong winds, heavy precipitation, and ultraviolet (UV) radiation. Operating at a naturally low pressure, the system is inherently safe, minimizing the risks associated with storing flammable gas.

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 project.

Product Application Areas

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

Digester Tanks (Integrated Domes): 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 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:

Inner Mongolia Xing'an League Bio-natural Gas Project: We supplied 4 tanks with a total capacity of 16,760 cubic meters for a large-scale bio-natural gas project in Inner Mongolia, showcasing our capability in major energy recovery infrastructure.

Anhui Hefei Food Waste Treatment Project: We provided 6 tanks with a total capacity of 685 cubic meters for a food waste treatment facility in Anhui, China, highlighting our role in sustainable waste-to-energy solutions crucial for biogas production.

Muyuan Group Suining 3rd Farm Livestock Wastewater Project: For a major agricultural client, we supplied 2 tanks with a total capacity of 17,962 cubic meters for a livestock wastewater project, demonstrating our expertise in large-volume, sealed agricultural containment critical for biogas management.

Conclusion

For Digester Tanks, the Double Membrane Biogas Holder is the optimal, most functional solution. By providing a flexible, durable, and visible integrated storage system, it ensures the complete capture and effective pressure regulation 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 enhanced operational control.