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Un-pressurized gas holder


  • minimized investment costs
  • long life span due to gentle operation
  • low operation and maintenance costs
  • no steel parts exposed to biogas
  • gas pressure can be adjusted to demand of downstream consumers
  • membrane housing can be adapted to local site conditions
  • membrane installation in existing building is possible


  • membrane (un-pressurized)
  • safety devices
  • level indication
  • gas blower
  • membrane housing (between membrane and housing an aerated space serves as heat buffer and inspection area)