Description
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The characteristics of beverage wastewater are as follows:
• High concentration of organic matter. The raw materials contain sugars, proteins, organic acids, pectin, etc., making it easily biodegradable wastewater.
• High amount of suspended solids. It contains fruit pulp, pomace, residues, colloids, and fine fibers, resulting in large fluctuations in suspended solids (SS), which can easily clog pipes and packing materials.
• Prone to acidification and putrefaction. The high sugar content leads to rapid fermentation and acid production after settling, causing a drop in pH, producing odors, and promoting sludge bulking.
UASB (up-flow anaerobic sludge blanket reactor) tanks made of GFS are the mainstream high-efficiency equipment for treating high-concentration organic wastewater from the beverage industry.
Glass fused to steel is a permanent, molecular bond created by fusing a specially formulated silica-based glass enamel to a base sheet of steel at very high temperatures (around 820°C / 1500°F), combines the advantages of both materials — the strength and flexibility of steel and excellent anti-corrosion properties of glass.
Core Advantages
The core advantages of glass-lined bolted tanks used as UASB reactors include excellent corrosion resistance, superior sealing performance, rapid construction, long service life, expandability and high cost-effectiveness. They are an ideal solution for the anaerobic treatment of high-concentration organic wastewater such as beverage wastewater.
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High Corrosion Resistance
Broad acid & alkali resistance. Sintered at 820–930℃, the enamel coating tolerates pH 1–14 and resists long-term corrosion from VFA, organic acids and H₂S in UASB biogas.
Extended service life: Carbon steel tanks last 5–8 years, while glass-fused steel tanks have a 20–30 year design life with low long-term maintenance expenses.
Dense & smooth surface: Anti-scaling and sludge non-adhesive, it prevents clogging and sludge bulking, and suits stable operation of UASB upflow and granular sludge bed.
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Superior Tightness
High air tightness: Adopting standard glass-fused steel plates, Grade 8.8/10.9 high-strength bolts and dedicated sealant. Biogas leakage < 1%, with collection rate increased by around 15% for better energy recovery.
High pressure bearing capacity: Withstands internal pressure up to 0.5 MPa. Suits UASB upflow velocity and biogas pressure variation, free from deformation and leakage.
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Modular Bolted Assembly
Short lead time: Factory prefabricated panels + on-site bolt assembly reduces installation time by 40%.
Flexible capacity: Customizable from 50 to 20,000 m³ per unit. Supports on-site expansion, disassembly and relocation, ideal for phased construction and capacity adjustment of beverage factories.
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Low Cost & High Value
Economical cost: Total investment cuts by 20–25% versus concrete UASB, requiring no long-term corrosion protection.
Simple O&M: Smooth interior for easy cleaning and low sludge output. Modular structure enables rapid repair of damaged coating without full shutdown.
Energy efficient: Excellent thermal insulation reduces UASB heating consumption. High biogas recovery helps offset operating costs via power generation and waste heat reuse.
Frequently Asked Questions
❓What is a GFS UASB reactor and why is it used for beverage wastewater?
A GFS (Glass-Fused-to-Steel) UASB (Up-flow Anaerobic Sludge Blanket) reactor is a high-efficiency anaerobic treatment system built with enamel-coated steel panels. It is widely used for beverage wastewater because the wastewater contains high concentrations of organic matter, sugars, and suspended solids that are effectively broken down through anaerobic digestion, while the glass-fused steel construction resists the corrosive byproducts such as organic acids and H₂S generated in the process.
❓What pH range can a glass-fused-to-steel tank tolerate?
Standard grade glass-fused-to-steel tanks tolerate a pH range of 3–11, while special grade tanks can handle the full range of pH 1–14. This broad chemical resistance makes them suitable for the highly variable and often acidic conditions found in beverage wastewater treatment systems.
❓How long is the service life of a glass-fused-to-steel UASB tank?
Glass-fused-to-steel UASB tanks are designed for a service life of 20–30 years, significantly longer than conventional carbon steel tanks which typically last only 5–8 years. The durable enamel coating sintered at 820–930°C provides long-term protection against corrosion with minimal maintenance requirements.
❓How does a GFS UASB tank compare in cost to a concrete UASB reactor?
GFS UASB tanks offer a total investment reduction of approximately 20–25% compared to concrete UASB reactors. Additional savings come from lower long-term maintenance costs, no need for corrosion protection treatments, and the ability to recover energy from biogas, which can offset operating expenses through power generation and waste heat reuse.
❓Can the capacity of a GFS UASB tank be expanded after installation?
Yes. The modular bolted design of GFS UASB tanks allows for flexible capacity adjustments. Units can be customized from 50 to 20,000 m³ and support on-site expansion, disassembly, and relocation. This makes them ideal for beverage factories that require phased construction or future capacity increases.
❓How is biogas leakage controlled in a GFS UASB reactor?
Biogas leakage is controlled through the use of standard glass-fused steel panels, Grade 8.8/10.9 high-strength bolts, and dedicated sealants applied at all joints. This construction achieves a biogas leakage rate of less than 1%, improving the biogas collection rate by approximately 15% and enabling better energy recovery compared to less tightly sealed reactor types.
