The anaerobic digester tank is the heart of your CBG plant. Choosing between Reinforced Cement Concrete (RCC) and Glass Fused to Steel (GFS) technologies is one of the most critical engineering decisions you will make.
RCC (Reinforced Cement Concrete)
RCC tanks are the traditional backbone of heavy infrastructure. Constructed on-site using M25 to M35 grade concrete and heavy steel reinforcement.
- Lifespan: 25 to 40 years. Highly durable.
- Construction Time: 2 to 4 months. Requires extensive on-site civil work and curing time.
- Thermal Insulation: Excellent natural thermal mass, keeping mesophilic/thermophilic temperatures stable.
- Best For: Large capacity plants (5 to 50+ TPD) where permanence is key and construction timelines are flexible.
GFS (Glass Fused to Steel)
GFS tanks are modern, modular solutions. Steel panels are coated with glass enamel and fused at 850°C in a factory, then bolted together on-site.
- Lifespan: 20 to 30 years. Highly resistant to the corrosive H2S environment inside the digester.
- Construction Time: 2 to 4 weeks. Factory-manufactured precision allows for rapid deployment.
- Modularity: Can be dismantled, relocated, or expanded in the future.
- Best For: Fast-track projects, locations with limited civil labor, or smaller capacity plants (1 to 5 TPD) where speed to commissioning is critical.
The ADON Recommendation Framework
If your primary constraint is time-to-market or you are building on leased land, GFS is the superior choice. However, if you are building a massive, multi-feedstock facility (10+ TPD) on owned land and want to optimize for the lowest possible 30-year Total Cost of Ownership (TCO), RCC remains the undisputed champion.
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