Cogatec® Double Membrane Gasholder
Optimum storage volume for your biogas plant
The Cogatec double membrane gasholder is the ideal biogas roof for storing biogas. The geometry of the different spherical shapes ensures that the optimum gas storage volume is utilised. Monitoring is carried out by our state-of-the-art laser measuring system. Our system enables a flexible mode of operation.
The roof system, designed for biogas plants, agricultural operations as well as sewage treatment and industrial plants, consists of two separate, high-frequency welded polyester membranes that are PVC-coated on both sides. The fabrics used impress with their low gas permeability, very high UV stability and the special, dirt-repellent top layer. The outer membrane of the double membrane gas reservoir absorbs the static loads caused by wind and snow loads. This allows the inner membrane to be operated almost without pressure, thus enabling a longer service life. Our membranes are provided with a keder in the clamping area, which diverts the forces arising from weather influences into the anchoring clamping rail in a form- and force-fitting manner.
Product variants
Double Membrane Gasholder
The Cogatec double membrane gasholder is a roof system for storing biogas that is placed on top of a tank. The high-frequency welded membrane roof is attached to the container crown by means of a stainless steel clamping ring. To ensure the tightness of the clamping rails, the substructure is attached directly to the inside of the container.
Construction
| (1) Outer membrane (2) Inner membrane (3) Over/underpressure protection | (4) Exhaust air duct with exhaust air flap (5) Belt substructure incl. tensioning net (6) Centre column cantilever with crown | (7) Inspection window (8) Support air fan (9) Laser level measurement |
Double Membrane Gasholder on Foundation
The Cogatec double membrane gasholder on foundation is a free-standing biogas storage tank consisting of three membranes. The gas space of the ¾-sphere or other storage heights is formed between the inner and bottom membrane. The optimised laser measuring system ensures exact measurement of the filling level. Common applications are an additional storage volume for biogas plants (clean gas storage), sewage plant storage or industrial storage for process gases. With this application, operating pressures of up to 100 mbar can be run, depending on the storage tank size.
Construction
| (1) Outer membrane (2) Inner membrane (3) Floor membrane | (4) Overpressure protection (5) Inspection window (6) Support air fan | (7) Laser level measurement |
Double Membrane Gasholder - Special Shapes
In addition to the standard spherical shape, we also offer the double membrane gasholders in various special shapes. These include, for example, the rectangular storage tank (first graphic), which is erected on a rectangular, closed container, or a hybrid ¾-ball in combination with a cylinder (second graphic), which stands on a concrete foundation.
Construction
| (1) Outer membrane (2) Inner membrane | (3) Floor membrane (4) Support air fan | (5) Exhaust air duct (6) Laser level measurement |
Technical information
European high-tech PVC membranes, fabric-reinforced
Diameter of the biogas roof possible up to over 50 m
Substructure of pre-tensionable belt system and overlying desulphurisation net
High tear resistance, adapted to your membrane roof, with low gas permeability and high UV stability
Supply and exhaust air ducts made of stainless steel pipes
Any desired storage height can be realised
Level measurement of the biogas storage tank by laser
Do you have any questions?
Are you looking for quick answers to the most important questions about our double membrane gasholders, projects or subsidies? Find out now in our FAQ section! If you still can't find the answer you're looking for, simply contact us using our contact form!
In various federal states, products to reduce CO² emissions are promoted. These include, for example, emission protection roofs for covering liquid manure tanks. We will be happy to advise you on the current subsidies. Just give us a call or use the contact form.
We use fabric types II, III, IV, V for our double diaphragm gas storage tanks. They are offered in the colour variants moss green and light grey.
We offer you various options for making your roof system as energy-efficient as possible. Feel free to contact us directly or via our contact form.
It is difficult to give a flat rate price without knowing the exact project. Feel free to fill out the contact form and we will coordinate an on-site appointment with you to discuss all the details and provide a non-binding quote.
For steel components, we use application-specific stainless steel (V2A and V4A). This results in a high resistance to corrosion.
Whether your existing wooden beam construction can be reused always depends on the condition of the wooden beams. In most cases this is possible. After our field service has gained an overview, we can advise you on how to proceed.
Yes, reuse is possible. Instead of the clamping hose, we recommend our clamping rail system for anchoring the membranes. The use of the rails increases the operational safety compared to a clamping hose.
Depending on the condition of the centre column, reuse is possible. The HUESKER centre column head can be adapted to all commercially available columns so that the existing column can continue to be used.
