Center Enamel: One-Stop Solution Provider with GFS Tanks and CSTR Process

Global biogas policy has evolved from a purely waste treatment orientation to a core component of energy strategy and climate action. The EU, through the Renewable Gas Directive and REPowerEU Plan, has set mandatory targets for biomethane production growth and uses the Carbon Border Adjustment Mechanism to incentivize member states to improve organic waste treatment rates, incorporating biogas into the green hydrogen certification system. The US, under relevant energy legislation, provides multiple incentives such as production tax credits and investment tax credits for biogas and biomethane projects, and includes biogas in the Renewable Fuel Standard system.

China has incorporated biogas into its rural revitalization strategy and the "Rural Energy Revolution" priority development catalog, updated national standards for automotive biomethane, and promotes the integration of biomethane into urban gas pipeline networks. The global policy framework is shifting from fiscal subsidy-driven to carbon market-driven and quota-mandatory approaches, with more countries incorporating biogas into their Nationally Determined Contributions.

GFS tanks: Adaptable to Extreme Climates and Geological Conditions Worldwide

GFS tanks can undergo customized wind and seismic design based on project site climate and geological conditions, with environmental adaptability far superior to concrete tanks. Concrete tanks are cast-in-place monolithic structures, with seismic and wind resistance entirely dependent on on-site construction quality. In remote areas, typhoon-prone zones, and earthquake belts, construction quality is difficult to control. Under strong earthquakes or typhoons, concrete tanks are prone to cracking and base settlement damage, with subsequent reinforcement costs equivalent to rebuilding.

GFS tanks undergo collection of local seismic intensity, maximum wind pressure, and foundation bearing capacity data before construction, with customized thickened steel panels, stiffening ribs, and anchored base components—all factory-prefabricated to standardized specifications. The bolted panel structure has excellent stress distribution capability, making it less prone to overall fracture under seismic and typhoon impacts, and minor foundation settlement will not cause through-cracking. Structural parameters can be flexibly adjusted for mountainous, coastal typhoon-zone, and high-seismic-zone projects, providing long-term protection against extreme natural climate damage.

CSTR Reaction Process

CSTR operates in continuous feed, continuous reaction, and intermittent/continuous sludge discharge mode, with a concise and coherent process flow. High-solids organic wastewater, after pretreatment to remove large-particle impurities, is fed at a constant rate into the sealed anaerobic reactor via feed pumps. Continuous mechanical stirring maintains uniform mixing throughout the reactor, creating a stable anaerobic environment. Within the reactor, acidogenic bacteria and methanogens decompose macromolecular organic matter in stages, first hydrolyzing and acidifying polysaccharides, proteins, and lipids into volatile fatty acids, then further degrading them into methane and carbon dioxide biogas. Throughout the reaction, no material stratification occurs, pollutants are continuously degraded, treated supernatant overflows from the upper portion of the reactor, aged sludge is periodically discharged from the bottom, and biogas is uniformly collected for resource utilization, maintaining stable sludge concentration and reaction equilibrium for consistent treatment performance.

Biogas Application Benefits

After desulfurization, dehydration, and upgrading, biogas can be utilized in multiple high-efficiency applications, achieving closed-loop value conversion of organic waste to energy and resources.

Biogas CHP: Biogas is fed into gas engines/turbines for power generation—electricity can be grid-sold or self-consumed, with waste heat recovered for digester heating and plant heating—overall energy efficiency exceeding 80%, the most mainstream biogas utilization method.

Biogas upgrading to biomethane: After carbon dioxide removal to >95% methane purity, it is equivalent to pipeline natural gas and can be injected into city gas networks or compressed as CNG/LNG for vehicles—significant economic benefits.

Direct combustion for heating: Biogas can be burned directly for boiler heating, sludge drying, agricultural product drying, greenhouse heating, and other industrial/agricultural heating applications—replacing coal/natural gas and reducing fossil fuel consumption.

Flare combustion for emergency disposal: When biogas production exceeds utilization capacity, it is flared to reduce direct methane greenhouse gas emissions, meeting environmental compliance requirements. Each cubic meter of biogas has a calorific value of approximately 21-25 MJ, can generate 1.5-2.0 kWh of electricity, or replace 0.7-0.8 cubic meters of natural gas.

Large-scale biogas plants produce thousands to tens of thousands of cubic meters of biogas daily, with annual power generation reaching millions to tens of millions of kWh—carbon reductions can be developed as CCER carbon credits for trading income, delivering triple value in environmental management, clean energy, and carbon assets.

Center Enamel-Over a Decade of Global Installation Experience

Unmatched global practical experience among domestic peers—over a decade covering multiple regions and all industry sectors. In 2009, Center Enamel completed the first overseas GFS tank installation—sending a team to Niger, Africa for drinking water storage tank installation. In 2015, it broke industry ground with China's first GFS tank export and installation to the US—passing strict US acceptance standards. All installed projects have operated stably for many years, covering livestock biogas, POME, municipal wastewater, and drinking water storage applications. Construction has covered Southeast Asia, Africa, the Americas, and other regions—accumulating specialized solutions for complex sites including mountainous terrain, coastal salt spray, tropical high temperatures, and high-standard European/American facility conditions—maturely addressing global special construction requirements.

Full-Industry-Chain Integrated Delivery Capability

Center Enamel is the only company globally integrating proprietary enamel frit R&D, self-manufactured tanks, and EPC general contracting—full-process self-control from solution design, equipment production, cross-border logistics, overseas construction, to post-construction O&M—significantly reducing client coordination and time costs.

Glass-Fused-to-Steel Roof Cover Solution

Glass-Fused-to-Steel Roof is a specialized tank cover solution designed for high air-tightness applications, primarily suited for CSTR anaerobic fermentation tanks and other biogas reactor tanks, serving as a core supporting component in organic waste anaerobic treatment projects. The roof is manufactured with the same material system as glass-fused-to-steel assembled tanks, with steel substrate and high-temperature fused glass coating integrated into one unit. The roof panel joints are equipped with specialized sealant strips and fasteners, achieving high-level overall air-tightness that completely seals biogas generated from anaerobic reactions inside the tank, preventing methane and odorous gas leakage while enabling biogas recovery and on-site odor control.

The product resists long-term corrosion from fermentation liquid and acid/alkaline biogas slurry, and will not be corroded or delaminate due to microorganisms or sulfides in the anaerobic environment. Its service life is synchronized with the glass-fused-to-steel tank, significantly reducing maintenance frequency. The structure employs steel truss supports for the glass-coated panels, providing stable load-bearing capacity. It can accommodate various process openings for mixers, biogas collection, monitoring, and manways, offering high integration. Modular components enable rapid on-site assembly, suitable for large-volume anaerobic fermentation tanks. It is widely used in livestock manure treatment, food waste anaerobic digestion, straw biogas, and municipal sludge disposal projects, and is the mainstream reliable roof selection for anaerobic fermentation tanks.