Fusion Bonded Epoxy Tank for Edible Oil and Fat Wastewater: Prevents corrosion from FOG and high organic acids

Fusion Bonded Epoxy Tank for Edible Oil and Fat Wastewater: Prevents corrosion from FOG and high organic acids

Edible oil and fat wastewater is one of the most challenging waste streams in the food processing industry. It is characterized by high concentrations of FOG (Fats, Oils, and Grease) and an extremely high organic acid content resulting from the rapid breakdown of residual organic matter. This combination creates a severe corrosive threat to containment vessels: FOG penetrates porous linings, while organic acids attack steel and concrete. Consequently, a specialized tank is required that actively prevents corrosion from FOG and high organic acids to ensure long-term structural integrity and process efficiency. The Fusion Bonded Epoxy (FBE) Tank is specifically designed with a high-density, chemically inert barrier to resist this dual threat. At Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel), we engineer FBE bolted steel tanks to provide the durable, non-porous containment essential for the reliable treatment of oil and fat effluent.

The Triple Threat of Oil and Fat Effluent

Containment solutions for edible oil and fat wastewater face a synergistic challenge that rapidly degrades standard materials:

FOG Penetration and Adhesion: Fats, oils, and grease are hydrophobic and readily adhere to and penetrate porous surfaces like concrete or compromised linings. Once FOG penetrates, it creates pathways for acidic attack and undermines the liner's bond to the substrate, making it impossible to prevent corrosion.

High Organic Acid Generation: The high organic load in fat wastewater rapidly breaks down, generating volatile fatty acids (VFAs). These high organic acids create a corrosive low-pH environment that continuously attacks the containment vessel, demanding an exceptionally resilient coating.

Temperature and High BOD: The effluent often discharges at elevated temperatures from cleaning or refining processes, subjecting the coating to continuous thermal stress. Simultaneously, the high BOD content necessitates large, robust biological reactors.

Process Complication: The presence of FOG interferes with crucial wastewater treatment steps, such as aeration and sludge settling, requiring effective, reliable pre-treatment vessels, often in the form of Dissolved Air Flotation (DAF) units.

The essential goal is to utilize a tank lining that acts as an impermeable barrier against FOG while resisting the high organic acids generated during effluent decomposition.

The FBE Solution: Prevents Corrosion from FOG and High Organic Acids

Center Enamel’s Fusion Bonded Epoxy Bolted Steel Tanks are engineered to effectively prevent corrosion from FOG and high organic acids, ensuring durability in oil and fat processing environments:

Impenetrable FOG Barrier: The FBE coating is a dense, non-porous thermoset polymer that is molecularly bonded to the steel. Unlike conventional porous linings, the FBE structure effectively blocks the penetration and adhesion of FOG, eliminating the primary pathway for sub-surface corrosion and degradation.

Superior Resistance to High Organic Acids: The FBE formulation is highly resistant to the continuous corrosive attack from volatile fatty acids (VFAs) and other high organic acids generated by the breakdown of fat and oil residues. This chemical defense ensures the steel remains protected for decades.

High Structural Integrity: Constructed from high-strength, factory-engineered steel, FBE tanks offer the superior structural capability required to safely contain the immense hydraulic load of large equalization basins and high-density DAF or anaerobic digester units.

Hygienic and Anti-Fouling Surface: The smooth FBE finish minimizes the adherence of sticky FOG and organic matter, simplifying cleaning procedures and maintaining the efficiency of the wastewater process equipment inside the tank.

Corrosion Protection in DAF Units: FBE tanks are perfectly suited for Dissolved Air Flotation (DAF) containment, resisting both the corrosive effluent and the chemical agents (coagulants/flocculants) used in the separation process.

Product Industry Application: FBE Tanks in Edible Oil and Fat Wastewater Treatment

The resilience and anti-FOG properties of FBE tanks make them essential across the entire spectrum of edible oil and fat wastewater management:

Oil/Water Separation and FOG Removal: Used in the critical initial pre-treatment stage to separate free oil and grease from the wastewater stream, relying on the FBE’s non-porous surface.

Dissolved Air Flotation (DAF) Containment: FBE tanks serve as the main, chemically resistant vessel for the DAF process, providing structural stability and corrosion resistance under continuous operation.

Equalization Basins: Used to stabilize the flow, temperature, and pH of the volatile fat wastewater stream before biological treatment, requiring the FBE coating's resistance to rapid pH swings.

Anaerobic Digestion (AD) Reactors: FBE tanks serve as robust, gas-tight vessels for converting the high organic load into biogas, resisting both the FOG and the sulfuric acid (H2​S byproducts) generated during the digestion process.

Sludge Holding: Providing secure, chemically resistant storage for the concentrated, dense sludge and skimmed FOG that is removed from the DAF and clarification stages.

Project Case Studies: FBE Tanks in Edible Oil and Fat Wastewater Treatment

Center Enamel has provided high-integrity containment solutions for major food and oil processing facilities, confirming the FBE tank's capability to prevent corrosion from FOG and high organic acids.

Center Enamel's Role in Sustainable Food Processing

Shijiazhuang Zhengzhong Technology Co., Ltd. (Center Enamel) is committed to supplying infrastructure that ensures the environmental compliance and operational efficiency of the food processing industry. Our FBE tanks for edible oil and fat wastewater are manufactured with uncompromising quality control, guaranteeing a molecularly-bonded, high-performance coating that provides a permanent, impermeable defense against chemical and FOG penetration. By choosing Center Enamel, clients invest in a vessel that definitively prevents corrosion from FOG and high organic acids, drastically reducing maintenance costs and securing the long-term reliability of their wastewater infrastructure.

Conclusion: Impermeable Defense for Corrosive Effluent

The severe combined challenge of FOG and high organic acids in edible oil and fat wastewater requires a specialized and resilient containment solution. The Fusion Bonded Epoxy Tank, with its non-porous structure, superior chemical resistance, and high structural strength, is the definitive vessel that actively prevents corrosion from FOG and high organic acids. It provides processors with a durable, low-maintenance asset that ensures effective pre-treatment, protects downstream biological reactors, and secures long-term compliance in this aggressive industrial environment.
To deploy a high-integrity containment system engineered to resist the combined threat of fats, oils, grease, and high organic corrosivity, choose Center Enamel's Fusion Bonded Epoxy Bolted Steel Tanks. Contact us today to secure your essential industrial infrastructure.

Shijiazhuang Zhengzhong Technology Co.,Ltd is a professional manufacturer dedicated to the design and fabrication of bolted storage tanks since 1989. Our products range includes Glass-Fused-to-Steel (GFS) tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks and aluminum geodesic dome roofs. With professional enameling R&D team and more than 20 enameling patents, Shijiazhuang Zhengzhong Technology Co.,Ltd has become the leader in bolted tanks industry of Asia. Our products are certified to ISO 9001, CE, NSF/ANSI 61, WRAS, ISO 28765, LFGB, BSCI, ISO 45001 and other international standards.

Shijiazhuang Zhengzhong Technology Co., Ltd is not only the first manufacturer in China which produces Glass-Fused-to-Steel tanks, but also the most experienced professional bolted tanks manufacturer in Asia. The engineering & design, product testing and quality system of Center Enamel Glass-Fused-to-Steel tanks is in strict accordance with AWWA D103-09, OSHA, ISO 28765, NSF/ANSI 61, NFPA and other international standards. Center Enamel Glass-Fused-to-Steel tanks are wildly used in drinking / potable water, industrial effluents, municipal sewage, bio-energy, landfill leachate, agriculture and other applications. Until 2023, Center Enamel bolted tanks have been exported to more than 100 countries including USA, Australia, Canada, Malaysia, Indonesia, Russia, UAE, Panama, Brazil and South Africa etc., the superior tank quality and prompt service gains us worldwide recognition.

As an outstanding containment and cover system provider with more than 30 years of experience, Shijiazhuang Zhengzhong Technology Co., Ltd sincerely expects to establish long-term cooperation with the local partners throughout the world and make continuous contribution to the development of the industry.