500 m³ Double Membrane Gas Holder Successfully Installed for a Biological Wastewater Treatment Project
Another Benchmark Project for Green Gas Storage Equipment, Supporting the Resource Recovery and Utilization of Biogas
Recently, a 500 m³ biogas balloon constructed by Qingdao Haiyue Membrane Structure Co., Ltd. for a biological wastewater treatment project in Dezhou, Shandong, was successfully installed and passed the gas-tightness test on the first attempt. This milestone marks the full completion of the project’s biogas collection and storage system, laying a solid foundation for subsequent biogas utilization, including power generation and heating.
I. Project Overview
This project serves a biological wastewater treatment facility in Dezhou, Shandong Province. The facility handles a large volume of wastewater with a high organic load, enabling its anaerobic digestion unit to produce biogas steadily.
To address the challenges of immediate flaring and the lack of peak-shaving capacity, the project is equipped with a 500 m³ biogas storage for buffer storage and constant-pressure delivery of biogas.
During installation, the project team overcame a tight schedule and simultaneous on-site operations. Every stage—from laying the bottom membrane and installing the inner membrane to tensioning the outer membrane and commissioning the intelligent control cabinet—was carried out strictly in accordance with technical procedures. The installation was ultimately completed ahead of schedule and received high recognition from the project owner.
II. What Is a Double Membrane Gas Holder?
A biogas domes is a flexible gas storage system widely used in biogas plants, wastewater treatment facilities, food waste treatment projects, and other applications. It consists of three main components: an outer membrane, an inner membrane, and a bottom membrane.
- Outer membrane: Made of high-strength coated fabric with excellent UV and ageing resistance. It is continuously inflated at a controlled pressure to maintain the gas holder’s shape while protecting the internal structure against wind, rain, and snow loads.
- Inner membrane: Rises and falls according to the volume of biogas stored, completely separating the biogas from the supporting air chamber.
- Bottom membrane: Securely anchored to the foundation to ensure the overall gas tightness of the system.
The supporting air chamber between the inner and outer membranes is automatically regulated by intelligent blowers and a pressure control system. This allows the gas holder to maintain a stable shape and constant outlet pressure during operation, without requiring the water-seal system or winter anti-freezing facilities used by traditional wet gas holders.
III. Core Advantages of the Double Membrane Gas Holder
Compared with traditional wet gas holders and steel gas storage systems, the double membrane gas holder offers the following advantages in this project:
Long service life: High-quality imported membrane materials offer excellent corrosion and ageing resistance, with a design service life of up to 15 years or more.
Constant storage pressure: The intelligent constant-pressure control system provides stable outlet pressure, supporting the efficient operation of downstream biogas generator sets.
Short construction period: Factory prefabrication and on-site assembly reduce the installation period to approximately one-third of that required for a conventional gas holder.
Lower overall cost: No water-seal system or winter anti-freezing facilities are required. The lightweight structure also reduces foundation loads and civil construction costs.
Excellent gas tightness and safety: The isolated inner membrane effectively prevents biogas leakage. The system is also equipped with multiple safety measures, including combustible-gas leakage alarms and overpressure interlock protection.
IV. Project Significance
Dezhou is located within the Beijing–Tianjin–Hebei regional air-pollution transmission corridor. In recent years, the city has continuously promoted the recovery and utilization of biogas from livestock manure, wastewater treatment, and other organic waste streams.
Once commissioned, the project’s 500 m³ double membrane gas holder will efficiently collect and store biogas produced by the anaerobic treatment unit. The stored biogas can then be used for heating and power generation within the facility, achieving both pollution reduction and energy recovery. The project also provides a valuable reference for similar biological wastewater treatment facilities.
We has long specialized in the research, development, and manufacture of equipment for biogas storage and resource utilization. Its product portfolio includes double membrane gas holders ranging from 50 m³ to 5,000 m³, widely used in wastewater treatment, livestock farming, food waste treatment, and alcohol and starch wastewater treatment projects.
Building on the successful completion of this project, the company will continue to provide customers with safe, efficient, and cost-effective gas storage solutions.
Conclusion
The successful installation of the 500 m³ double membrane gas holder marks an important milestone for the biological wastewater treatment project in Dezhou, Shandong. By providing safe storage, effective buffering, and stable-pressure delivery of biogas, the system will improve biogas utilization efficiency and ensure reliable operation of downstream heating and power generation equipment.
This project not only demonstrates the reliability and practical advantages of double membrane gas holders in biological wastewater treatment applications but also provides a valuable reference for the resource recovery of organic wastewater. Qingdao Haiyue will continue to deliver professional, safe, and efficient biogas storage solutions, helping customers turn waste into clean energy and achieve greener, low-carbon development.
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