Biogas Storage Free Energy From Waste

Biogas storage is a fundamental part of all Anaerobic Biogas Digestion systems. With capacities ranging from 5m3 to 5,000m3, Biogas holders are used to regulate the supply of Methane Gas produced from the decomposition of slurry and organic waste.

Our biogas storage bags are sealed and tested, the protective outer fabric skin is certified to British Standards and is engineered to withstand the worst loads the environment can throw at it in a once in 100 year storm.

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biogas storage
  • Base Structure's expert design and problem solving approach has given us one more vital component to help build the much needed UK capacity.
    Will Kirkman (Business Development Director, Burdens)

How it works

The triple membrane biogas holder is in effect two balloons that are held squeezed together in a tight constricting space. One balloon is filled with biogas, the other with air.

When the Anaerobic Digestion plant is producing more biogas than can be used, instead of losing money by flaring (or burning) off the excess (or even worse, venting it to atmosphere), it is pumped into the ‘Gas’ storage balloon for use later. To accommodate this added volume of biogas, air is simultaneously removed from the ‘Air’ balloon.

When more biogas is required than is being produced by the AD plant, air is pumped into the Air balloon forcing biogas out of the Gas balloon at a finely controlled pressure and flow rate. Because changes in volume are traded between Gas and Air balloons the total pressure contained by the Outer Skin is constant. By fixing the structure to the ground via the Outer Skin, this constant internal pressure is converted into a tension in the skin giving it a rigidity to resist external loads.

Simple failsafe pressure relief valves ensure the system can never be over-pressurised, and having two independent sources of pressure (Gas and Air) means the system can never be under-pressurised.

Our triple membrane biogas holder is held in place via a patented system of stainless steel hoops that are resin anchored into a concrete base and rolled steel tubes which are fed into a pocket that is attached to the Outer skin. The steel tube in the pocket is threaded through the hoops thereby securing the biogas holder on the base. The installation process is generally completed within one day.

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Temporary installation

Uniquely, our gas holder can be installed directly on top of the ground as a temporary structure. A ring of concrete or steel ballast weights can be supplied which overcomes the need for a concrete base.

This dramatically improves the flexibility of the system and even opens up the opportunity to introduce our gas holder as a temporary storage device or additional / emergency storage volume if your existing system fails or is being shut down for planned maintenance etc.