AMOCO Dantian Type B digester-mounted double membrane biogas holder (biogas balloon, digester cover, digester roof) is normally installed on top of the digester tank. Its appearance is usually a small hemisphere, which belongs to the common shape of double membrane biogas holders.

The Type B biogas holder and fermentation tank are connected into an organic whole, requiring no additional space. Meanwhile, there is no need to prepare a separate foundation for the biogas holder, so the cost is usually relatively lower.

With the Dantian Type B double membrane biogas holder, there is no need to consider the roof of the digester tank, which can save the cost of the fermentation tank.

Due to its small hemispherical shape, the Type B biogas holder is more suitable for biogas projects with a daily low to medium volume of biogas production.

Photos of AMOCO Type B double membrane biogas holder projects: Inner Mongolia, China (left) and Asahan, Indonesia (right).