Double Membrane Biogas Balloon/ holders are used for biogas storage. It’s mounted tightly on the roof of the Digester and separated sphere on surface of Land. The Biogas holder system has a double membrane structure.
The external cover dome is made of PVC and produced with special additives that are ultraviolet and precipitation resistant. Internal membrane, which is in direct contact with biogas, is made of a special material. The internal membrane is stretched by the pressure of the produced biogas. Air is pumped between the cover dome and internal membrane so that it provides pressure to the upper side of the membrane and gives a spherical shape to the cover dome.