Biogas Technology provides tailor made tank tops to fit any size or type (concrete, steel, etc) of digesters. The tank top advantage compare to the slab mounted is the footprint savings and the savings related to the double function of the tank top: as a tank cover and as a buffer tank. The disadvantage of this type of gasholder are: more expensive maintenance and a higher technical complexity when we are designing a high pressure gasholder.
Standard Tank top
The standard tank top gasholders work form 2mbar to 10mbar.
High pressure Tank top
Biogas Technology provides tank top gasholders working up to 50mbar.
TANK TOP GASHOLDER ADDITIONAL EQUIPMENT
Biogas Technology provide various combinations for this type of gasholder depending the digester type, pressure storage capacity, etc. Bellow we show some of the additional equipment:
The catcher system keeps out the inner membrane form the digester.
Digester access box
It provides access to the digester to install sensors or remove agitators from the digester.