Gas Storage

Biogas Storage Systems

Gas holders are an indispensable component in the operation of an efficient biogas plant.
An adequate gas holder improves the safety and efficiency of the biogas plant by reducing gas losses and creating “buffer storage” to cater for temperature changes and fluctuating gas volumes produced by the digester – which will not operate if steady gas production and withdrawal is not maintained.


Renew have partnered with Sattler who, in 1981, invented the double membrane gas holder for storing digester gas from waste water treatment plants. This design has proven successful over the decades and is now an integral feature in the design of modern waste water treatment works.


  • Storage can be retrofitted on top of existing digesters or as a standalone structure
  • Maintenance free long service life
  • Quick to install
  • Excellent reliability
  • Permanently gas-tight membrane

Other Applications

Gas pre-conditioning with an optional sulphur removal net:
By adding a small amount of oxygen into the digester solid sulphur forms on the catchment net. This measure ensures some sulphur is collected before entering upstream equipment. Biogas contains high levels of sulphur and its removal is critical when operating gas engines.

Different gas types:
Gas holders can also be employed for storage of a wide range of combustible gases and although they are mainly used for biogas systems, this is by no means a restriction for other gas applications.