Center Enamel: A Professional One-Stop Solution Provider for Wastewater Treatment Projects

The global biogas industry is in a phase of large-scale expansion, with China contributing the major share of new capacity, becoming the fastest-growing single market. Europe's mainstream model focuses on combined heat and power (CHP) and biomethane grid injection, with active biomethane certificate trading and application scenarios covering power generation, heating, and transportation fuel. China, in contrast, emphasizes vehicle fuel and industrial heating while actively promoting the fertilizer utilization of digestate, showing significant differentiation in application scenarios.

Southeast Asian emerging markets show rapidly growing food waste treatment demand, becoming key areas for global companies; while African and Latin American markets remain in the early stages, primarily relying on low-cost direct application models. Countries show differentiated development paths in biogas resource utilization: Europe focuses on energy output, China emphasizes comprehensive utilization, and emerging markets prioritize pollution control.

Center Enamel’s Supporting Equipment

The core equipment is a vertical sealed anaerobic reactor tank, with Center Enamel GFS tanks as the mainstream choice for high-corrosion, high-viscosity wastewater conditions. The key operating equipment is a low-speed mechanical stirrer, comprising motor, gearbox, and impeller blades, achieving uniform mixing throughout the reactor and preventing sedimentation and crusting.

Supporting equipment includes corrosion-resistant feed pumps, flow control valves, and inlet piping for precise feed flow control; biogas collection systems (piping, water seals, dual-membrane gas holders, desulfurization units) for biogas collection, purification, and storage. Online monitoring equipment for temperature, pH, and liquid level is integrated for real-time reaction parameter monitoring. Sludge discharge pumps, return piping, and emergency drain systems complete the equipment package, with convenient operation and maintenance, low failure rates, and support for long-term continuous stable operation.

Biogas Plant Wastewater Sources 

Biogas plant wastewater is secondary wastewater from organic waste resource recovery—primarily digestate from anaerobic digestion, distinct from primary production wastewater. It originates from anaerobic digestion of livestock manure, crop straw, food waste, and brewery residues, as a byproduct of biogas fermentation. Auxiliary wastewater includes equipment washing, digester tank cleaning, desulfurization system drainage, and plant floor washdown. Continuous stable production with only minor variations with feedstock input and fermentation cycles. Pollutants are significantly transformed through anaerobic digestion, with composition distinct from primary high-concentration organic wastewater—it is the core wastewater requiring treatment in biogas plants.

Malaysia Palm Oil Biogas Project

The project uses Center Enamel GFS tanks as the core anaerobic digestion facility with 5 tanks, each with effective volume of 5,400 m³, total effective volume 27,000 m³. Influent COD ≥ 60,000 mg/L, BOD ≤ 25,000 mg/L. After anaerobic digestion, effluent COD drops to below 12,000 mg/L, BOD ≤ 5,000 mg/L—overall organic removal efficiency approximately 80%. Single tank daily biogas production 4,400 m³, total project daily biogas 22,000 m³—stable biogas yield of 0.45 m³ per kg COD removed—efficient biogas energy recovery while solving palm oil processing wastewater pollution.

Center Enamel’s Full-Category Complete Product Matrix

Center Enamel has built a complete product matrix of "core storage tanks + supporting covers + specialty pressure vessels + complete environmental engineering services"—the only company globally to achieve integrated enamel frit R&D, self-manufacturing, and GFS tank application.

① Core: Proprietary GFS Tanks

Using proprietary double-sided hot-rolled double-layer enamel anti-corrosion technology—resistant to strong acids/alkalis, high salinity, and microbial corrosion—modular quick assembly—suitable for all strong-corrosion conditions in wastewater, biogas, and chemical applications.

② Supporting: Fusion Bonded Epoxy Tanks

Produced on China's first intelligent standardized production line—primarily for drinking water, fire water, and neutral medium storage.

③ Sealing: Aluminum Dome Covers

Proprietary high-strength aluminum alloy self-supporting structure—meeting international waterproof and load-bearing standards—suitable for tank sealing and biogas collection.

④ Other Tanks: Carbon Steel Tanks, Stainless Steel Tanks, Composting Tanks, Various Non-Standard Pressure Vessels.

⑤ Engineering Services: Environmental EPC General Contracting, Anaerobic Process Section Subcontracting—one-stop coverage across food waste, leachate, municipal wastewater, livestock biogas, petrochemical/metallurgical, and seawater desalination industries—customizable tank volume, corrosion protection grade, and complete process solutions with integrated equipment manufacturing and engineering construction.

Center Enamel Comprehensive International Authoritative Certifications

Center Enamel holds CE, NSF, WRAS, ISO9001, BSCI, ASME, and other global certifications—fully clearing EU, North American, Southeast Asian, and African project tendering barriers—providing critical hard credential advantages for large overseas project bidding.

Single and Double Membrane Roof Cover Solution

Single and Double Membrane Roofs are proprietary airtight tank cover systems for anaerobic digestion and biogas storage projects, specifically developed for biogas collection and odor containment, representing a benchmark lightweight sealing solution for fermentation tanks. The single-layer membrane roof features a simple structure with economical cost, meeting basic biogas containment needs. The double-layer membrane roof consists of inner and outer corrosion-resistant membrane materials, with pressurized air in the interlayer forming rigid support, providing outstanding thermal insulation that reduces biogas condensate formation inside the tank, with enhanced wind and snow load resistance suitable for high-altitude and windy outdoor sites.

The membrane material is specialized aging-resistant and biogas-slurry-corrosion-resistant PVDF membrane, which will not leak or degrade from long-term contact with biogas or hydrogen sulfide. The flexible structure accommodates tank settlement and slight deformation without cracking or gas leakage. The lightweight design eliminates heavy steel support trusses, significantly reducing the load on the tank and foundation, saving construction costs.

The roof integrates biogas outlets, safety pressure relief valves, and access channels, fully enabling closed gas collection for anaerobic fermentation tanks, recovering biogas for power generation and heating while blocking odor diffusion to meet environmental odor control requirements. It is widely used in large-scale livestock biogas projects, municipal sludge anaerobic digestion, and food waste fermentation projects, compatible with large-volume glass-fused-to-steel anaerobic tanks, with fast construction and simple maintenance requiring only periodic membrane seal integrity checks, offering significant overall engineering advantages.