Many people believe that anaerobic digestion only works in a laboratory setting. However, this is not the case. Anaerobic conditions, without the presence of oxygen, allow the microbes that produce biogas to develop and thrive. When storage basins are left open with no cover, they can be influenced by sunlight and wind. The introduction of oxygen is non-conducive for anaerobic microbial activity in the top 3 to 4 feet of any lagoon, pond, or reservoir.
Adding a floating cover for the digester, such as a double membrane cover, converts the full pond or reservoir into an effective anaerobic digester. A double membrane cover not only helps to keep out light and oxygen but also provides enhanced insulation and structural integrity, supporting consistent biogas production even in varying environmental conditions.
The process of anaerobic digestion requires an environment completely devoid of oxygen for bacteria to do their work effectively. IEC Covers offers world-class anaerobic digester covers, including the double membrane cover, which helps maintain stable temperatures for microbial activity and eliminates odors by containing methane. Our covers are designed, fabricated, and installed for a wide range of industries, including farms, food processing plants, paper mills, and other facilities that produce organic waste.
IEC Covers’ anaerobic digester covers, such as the double membrane cover, are perfect for both new and retrofit installations. These covers are expertly engineered by certified IEC Covers technicians and engineers with decades of experience in meeting customer specifications for biogas production and odor control. The double membrane design enhances insulation, provides additional structural stability, and allows for internal gas pressure regulation—making it ideal for efficient and long-term biogas containment.
We integrate the latest structural standards to ensure complete customer satisfaction. Our floating covers for digesters can be designed in fixed or buoyant configurations, and the double membrane cover is one of the most versatile and high-performing options available on the market today. Our tank mount designs also offer innovative and cost-effective solutions for both new and replacement anaerobic digester covers.
Effectively keeps oxygen out of anaerobic environments
Prevents biogas odors from escaping to the atmosphere
Reduces the possibility of explosion hazards due to CH4 biogas
Effectively insulates the top of the digester
A double membrane cover, also known as a dual membrane cover, offers one of the most versatile solutions for anaerobic digestion systems. The tank mount design provides an innovative and cost-effective answer for both new and replacement covers.
Benefits include:
Variable liquid level capabilities
Significant gas storage capabilities
Low installation cost
Complete odor containment
The function of the slide guides permits the double membrane cover to travel above the wall of the tank, thereby increasing gas storage capacity at high liquid levels. IEC Covers uses ultra-high molecular weight polyethylene slide plates on three sides of the structural steel tube to prevent double membrane covers from tipping and binding as they move vertically within the tank. These slide guides feature strong resistance against wind, seismic, and unbalanced loads in both radial and tangential directions.
Our versatile, low-friction ultra-high molecular weight polyethylene slide plate surfaces eliminate the need for lubrication, enabling convenient, maintenance-free operation.
About our slide guides:
Retrofits and upgrades with existing covers in place
Elimination of tipping and binding of anaerobic digester covers
Corrosion proof
No need for lubrication
Loads redistributed over several guides
Completely adjustable for convenient installation and alignment
Very minimal wear and tear