Glass-Fused-to-Steel Tanks are acting as various anaerobic digesters. It could be thermophilic digesters, mesophilic digesters or hydrolysis tanks amongst all of these processes where anaerobic environment is required.
When it comes to the cover solutions of an anaerobic digester, it could be a Glass-Fused-to-Steel roof or PVC coated double membrane gasholder. It will be determined by the AD process requirements. When AD tank is covered with double membrane gas holder, the anaerobic digester itself is also acting as a biogas storage tank of whose top is collecting biogas, this is common to be seen at many plants.
Considering the plant investment in a long-term on a whole, Glass-Fused-to-Steel tank is the most suitable and cost-effective choice of the anaerobic digester.
The integrated design can greatly save both on space and cost.