Single and Double Membrane Roofs

The single and double-membrane roofs are made of specially formulated, high-quality, reinforced thermoplastic materials for biogas storage. These materials have special surface treatment formulations that provide high resistance to penetration while protecting the fabric from the damaging effects of UV rays. Use different membrane strengths to provide the best operating performance while maintaining strict safety factors and standards.

Glass-Fused-to-Steel tanks with single membrane and double membrane roofs are the well-established anaerobic digester solutions and biogas storage solutions for anaerobic digestion processes. All of our biogas storage solutions are fully supported by structural calculations, giving you full confidence in the completion of the installation for many years to come.

The single-membrane roof can be used for less demanding applications and consists of a central column supported fabric roof fixed on the wall of the GFS tank. They are commonly used for biogas collection purposes with air-tightness.

The double membrane roof provides a durable and cost-effective solution for anaerobic digestion and biogas applications. The outer membrane is always inflated, while the inner membrane will expand and contract in proportion to biogas production, making it a suitable choice for pressurized applications.

Center Enamel provides single and double membrane roofs for biogas storage. Due to the special design of the membrane roof, the penetration of biogas is very small. Membrane roofs are characterized by minimal gas permeability, durability, and maximum gas storage.

For some cases of continuous biogas utilization (such as power generation), the storage of biogas does not require a separate biogas storage device, and the storage time of biogas is short. Therefore, combining the production, collection, and storage of biogas into one device can greatly save investment.

In the biogas project and wastewater treatment project, we recommend using the integrated anaerobic fermentation tank which covers the double membrane roof on top of the GFS tank. Advantages of integrated anaerobic fermentation tank:

Less investment and less floor space

Short installation period and low construction cost

Factory manufacturing, quality is well guaranteed

The flexible top cover is relatively convenient to open, which is conducive to the maintenance of the anaerobic tank.

It can adopt a double-layer structure to maintain a certain constant working pressure and enhance the look and feel.

The gas storage film is lighter, and the pressure on the tank body is smaller than that of the rigid top cover, which is beneficial to protect the tank body.

Shijiazhuang Zhengzhong Technology Co.,Ltd is a professional manufacturer dedicated to the design and fabrication of bolted storage tanks since 1989. Our products range includes Glass-Fused-to-Steel (GFS) tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks and aluminum geodesic dome roofs. With professional enameling R&D team and more than 20 enameling patents, Shijiazhuang Zhengzhong Technology Co.,Ltd has become the leader in bolted tanks industry of Asia. Our products are certified to ISO 9001, CE, NSF/ANSI 61, WRAS, ISO 28765, LFGB, BSCI, ISO 45001 and other international standards.

Shijiazhuang Zhengzhong Technology Co., Ltd is not only the first manufacturer in China which produces Glass-Fused-to-Steel tanks, but also the most experienced professional bolted tanks manufacturer in Asia. The engineering & design, product testing and quality system of Center Enamel Glass-Fused-to-Steel tanks is in strict accordance with AWWA D103-09, OSHA, ISO 28765, NSF/ANSI 61, NFPA and other international standards. Center Enamel Glass-Fused-to-Steel tanks are wildly used in drinking / potable water, industrial effluents, municipal sewage, bio-energy, landfill leachate, agriculture and other applications. Until 2023, Center Enamel bolted tanks have been exported to more than 100 countries including USA, Australia, Canada, Malaysia, Indonesia, Russia, UAE, Panama, Brazil and South Africa etc., the superior tank quality and prompt service gains us worldwide recognition.

As an outstanding containment and cover system provider with more than 30 years of experience, Shijiazhuang Zhengzhong Technology Co., Ltd sincerely expects to establish long-term cooperation with the local partners throughout the world and make continuous contribution to the development of the industry.